Replaced double-underscores in java and java-compat

6 files changed, 1156 insertions, 1009 deletions

diff --git a/cpp/src/Slice/JavaUtil.cpp b/cpp/src/Slice/JavaUtil.cpp
index 0a20815d592..ba141e904c0 100644
--- a/cpp/src/Slice/JavaUtil.cpp
+++ b/cpp/src/Slice/JavaUtil.cpp
@@ -1299,19 +1299,25 @@ Slice::JavaCompatGenerator::typeToObjectString(const TypePtr& type,
 
 void
 Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
-                                                 const string& package,
-                                                 const TypePtr& type,
-                                                 OptionalMode mode,
-                                                 bool optionalMapping,
-                                                 int tag,
-                                                 const string& param,
-                                                 bool marshal,
-                                                 int& iter,
-                                                 bool holder,
-                                                 const StringList& metaData,
-                                                 const string& patchParams)
+                                                      const string& package,
+                                                      const TypePtr& type,
+                                                      OptionalMode mode,
+                                                      bool optionalMapping,
+                                                      int tag,
+                                                      const string& param,
+                                                      bool marshal,
+                                                      int& iter,
+                                                      bool holder,
+                                                      const string& customStream,
+                                                      const StringList& metaData,
+                                                      const string& patchParams)
 {
-    string stream = marshal ? "__os" : "__is";
+    string stream = customStream;
+    if(stream.empty())
+    {
+        stream = marshal ? "ostr" : "istr";
+    }
+
     string v;
     if(holder)
     {
@@ -1585,9 +1591,9 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                     }
                     else if(mode == OptionalMember)
                     {
-                        out << nl << "int __pos = " << stream << ".startSize();";
+                        out << nl << "int pos = " << stream << ".startSize();";
                         out << nl << stream << ".writeProxy(" << v << ");";
-                        out << nl << stream << ".endSize(__pos);";
+                        out << nl << stream << ".endSize(pos);";
                     }
                     else
                     {
@@ -1634,26 +1640,26 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                     out << nl << "if(" << v << " != null && " << v << ".isSet() && " << stream << ".writeOptional("
                         << tag << ", " << getOptionalFormat(type) << "))";
                     out << sb;
-                    out << nl << "int __pos = " << stream << ".startSize();";
+                    out << nl << "int pos = " << stream << ".startSize();";
                     out << nl << typeS << "Helper.write(" << stream << ", " << v << ".get());";
-                    out << nl << stream << ".endSize(__pos);";
+                    out << nl << stream << ".endSize(pos);";
                     out << eb;
                 }
                 else
                 {
                     out << nl << "if(" << stream << ".writeOptional(" << tag << ", " << getOptionalFormat(type) << "))";
                     out << sb;
-                    out << nl << "int __pos = " << stream << ".startSize();";
+                    out << nl << "int pos = " << stream << ".startSize();";
                     out << nl << typeS << "Helper.write(" << stream << ", " << v << ");";
-                    out << nl << stream << ".endSize(__pos);";
+                    out << nl << stream << ".endSize(pos);";
                     out << eb;
                 }
             }
             else if(mode == OptionalMember)
             {
-                out << nl << "int __pos = " << stream << ".startSize();";
+                out << nl << "int pos = " << stream << ".startSize();";
                 out << nl << typeS << "Helper.write(" << stream << ", " << v << ");";
-                out << nl << stream << ".endSize(__pos);";
+                out << nl << stream << ".endSize(pos);";
             }
             else
             {
@@ -1776,9 +1782,9 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
 
                 if(st->isVariableLength())
                 {
-                    out << nl << "int __pos = " <<  stream << ".startSize();";
+                    out << nl << "int pos = " <<  stream << ".startSize();";
                     out << nl << typeS << ".write(" << stream << ", " << val << ");";
-                    out << nl << stream << ".endSize(__pos);";
+                    out << nl << stream << ".endSize(pos);";
                 }
                 else
                 {
@@ -1811,9 +1817,9 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                     out << nl << stream << ".skipSize();";
                 }
 
-                out << nl << typeS << " __tmpOpt = new " << typeS << "();";
-                out << nl << "__tmpOpt.__read(" << stream << ");";
-                out << nl << v << ".set(__tmpOpt);";
+                out << nl << typeS << " tmpOpt = new " << typeS << "();";
+                out << nl << "tmpOpt.read(" << stream << ");";
+                out << nl << v << ".set(tmpOpt);";
 
                 out << eb;
 
@@ -1928,9 +1934,9 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                 if(keyType->isVariableLength() || valueType->isVariableLength())
                 {
                     string d = optionalParam && optionalMapping ? v + ".get()" : v;
-                    out << nl << "int __pos = " <<  stream << ".startSize();";
-                    writeDictionaryMarshalUnmarshalCode(out, package, dict, d, marshal, iter, true, metaData);
-                    out << nl << stream << ".endSize(__pos);";
+                    out << nl << "int pos = " <<  stream << ".startSize();";
+                    writeDictionaryMarshalUnmarshalCode(out, package, dict, d, marshal, iter, true, customStream, metaData);
+                    out << nl << stream << ".endSize(pos);";
                 }
                 else
                 {
@@ -1938,17 +1944,17 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                     string tmpName;
                     if(optionalParam && optionalMapping)
                     {
-                        tmpName = "__optDict";
+                        tmpName = "optDict";
                         out << nl << "final " << typeS << ' ' << tmpName << " = " << v << ".get();";
                     }
                     else
                     {
                         tmpName = v;
                     }
-                    out << nl << "final int __optSize = " << tmpName << " == null ? 0 : " << tmpName << ".size();";
-                    out << nl << stream << ".writeSize(__optSize > 254 ? __optSize * " << wireSize
-                        << " + 5 : __optSize * " << wireSize << " + 1);";
-                    writeDictionaryMarshalUnmarshalCode(out, package, dict, tmpName, marshal, iter, true, metaData);
+                    out << nl << "final int optSize = " << tmpName << " == null ? 0 : " << tmpName << ".size();";
+                    out << nl << stream << ".writeSize(optSize > 254 ? optSize * " << wireSize
+                        << " + 5 : optSize * " << wireSize << " + 1);";
+                    writeDictionaryMarshalUnmarshalCode(out, package, dict, tmpName, marshal, iter, true, customStream, metaData);
                 }
 
                 if(optionalParam)
@@ -1962,7 +1968,7 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
 
                 if(optionalParam)
                 {
-                    tmpName = "__optDict";
+                    tmpName = "optDict";
                     out << nl << "if(" << stream << ".readOptional(" << tag << ", " << getOptionalFormat(type) << "))";
                     out << sb;
                     out << nl << typeS << ' ' << tmpName << ';';
@@ -1981,7 +1987,7 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                     out << nl << stream << ".skipSize();";
                 }
 
-                writeDictionaryMarshalUnmarshalCode(out, package, dict, tmpName, marshal, iter, true, metaData);
+                writeDictionaryMarshalUnmarshalCode(out, package, dict, tmpName, marshal, iter, true, customStream, metaData);
 
                 if(optionalParam)
                 {
@@ -1999,7 +2005,7 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
         }
         else
         {
-            writeDictionaryMarshalUnmarshalCode(out, package, dict, v, marshal, iter, true, metaData);
+            writeDictionaryMarshalUnmarshalCode(out, package, dict, v, marshal, iter, true, customStream, metaData);
         }
         return;
     }
@@ -2090,9 +2096,9 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                 if(elemType->isVariableLength())
                 {
                     string s = optionalParam && optionalMapping ? v + ".get()" : v;
-                    out << nl << "int __pos = " <<  stream << ".startSize();";
-                    writeSequenceMarshalUnmarshalCode(out, package, seq, s, marshal, iter, true, metaData);
-                    out << nl << stream << ".endSize(__pos);";
+                    out << nl << "int pos = " <<  stream << ".startSize();";
+                    writeSequenceMarshalUnmarshalCode(out, package, seq, s, marshal, iter, true, customStream, metaData);
+                    out << nl << stream << ".endSize(pos);";
                 }
                 else if(findMetaData("java:type:", metaData, ignore) ||
                         findMetaData("java:type:", seq->getMetaData(), ignore))
@@ -2105,7 +2111,7 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                     string tmpName;
                     if(optionalParam && optionalMapping)
                     {
-                        tmpName = "__optSeq";
+                        tmpName = "optSeq";
                         out << nl << "final " << typeS << ' ' << tmpName << " = " << v << ".get();";
                     }
                     else
@@ -2115,11 +2121,11 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
 
                     if(wireSize > 1)
                     {
-                        out << nl << "final int __optSize = " << tmpName << " == null ? 0 : " << tmpName << ".size();";
-                        out << nl << stream << ".writeSize(__optSize > 254 ? __optSize * " << wireSize
-                            << " + 5 : __optSize * " << wireSize << " + 1);";
+                        out << nl << "final int optSize = " << tmpName << " == null ? 0 : " << tmpName << ".size();";
+                        out << nl << stream << ".writeSize(optSize > 254 ? optSize * " << wireSize
+                            << " + 5 : optSize * " << wireSize << " + 1);";
                     }
-                    writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, metaData);
+                    writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, customStream, metaData);
                 }
                 else if(findMetaData("java:protobuf:", seq->getMetaData(), ignore) ||
                         findMetaData("java:serializable:", seq->getMetaData(), ignore))
@@ -2128,7 +2134,7 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                     // This just writes a byte sequence.
                     //
                     string s = optionalParam && optionalMapping ? v + ".get()" : v;
-                    writeSequenceMarshalUnmarshalCode(out, package, seq, s, marshal, iter, true, metaData);
+                    writeSequenceMarshalUnmarshalCode(out, package, seq, s, marshal, iter, true, customStream, metaData);
                 }
                 else
                 {
@@ -2139,7 +2145,7 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                     string tmpName;
                     if(optionalParam && optionalMapping)
                     {
-                        tmpName = "__optSeq";
+                        tmpName = "optSeq";
                         out << nl << "final " << typeS << ' ' << tmpName << " = " << v << ".get();";
                     }
                     else
@@ -2149,12 +2155,12 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
 
                     if(wireSize > 1)
                     {
-                        out << nl << "final int __optSize = " << tmpName << " == null ? 0 : " << tmpName << ".length;";
-                        out << nl << stream << ".writeSize(__optSize > 254 ? __optSize * " << wireSize
-                            << " + 5 : __optSize * " << wireSize << " + 1);";
+                        out << nl << "final int optSize = " << tmpName << " == null ? 0 : " << tmpName << ".length;";
+                        out << nl << stream << ".writeSize(optSize > 254 ? optSize * " << wireSize
+                            << " + 5 : optSize * " << wireSize << " + 1);";
                     }
 
-                    writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, metaData);
+                    writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, customStream, metaData);
                 }
 
                 if(optionalParam)
@@ -2167,7 +2173,7 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                 string tmpName;
                 if(optionalParam)
                 {
-                    tmpName = "__optSeq";
+                    tmpName = "optSeq";
                     out << nl << "if(" << stream << ".readOptional(" << tag << ", " << getOptionalFormat(type) << "))";
                     out << sb;
                     out << nl << typeS << ' ' << tmpName << ';';
@@ -2199,7 +2205,7 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
                     }
                 }
 
-                writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, metaData);
+                writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, customStream, metaData);
 
                 if(optionalParam)
                 {
@@ -2217,7 +2223,7 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
         }
         else
         {
-            writeSequenceMarshalUnmarshalCode(out, package, seq, v, marshal, iter, true, metaData);
+            writeSequenceMarshalUnmarshalCode(out, package, seq, v, marshal, iter, true, customStream, metaData);
         }
         return;
     }
@@ -2237,15 +2243,21 @@ Slice::JavaCompatGenerator::writeMarshalUnmarshalCode(Output& out,
 
 void
 Slice::JavaCompatGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
-                                                           const string& package,
-                                                           const DictionaryPtr& dict,
-                                                           const string& param,
-                                                           bool marshal,
-                                                           int& iter,
-                                                           bool useHelper,
-                                                           const StringList& metaData)
+                                                                const string& package,
+                                                                const DictionaryPtr& dict,
+                                                                const string& param,
+                                                                bool marshal,
+                                                                int& iter,
+                                                                bool useHelper,
+                                                                const string& customStream,
+                                                                const StringList& metaData)
 {
-    string stream = marshal ? "__os" : "__is";
+    string stream = customStream;
+    if(stream.empty())
+    {
+        stream = marshal ? "ostr" : "istr";
+    }
+
     string v = param;
 
     string instanceType;
@@ -2305,14 +2317,14 @@ Slice::JavaCompatGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
     {
         out << nl << "if(" << v << " == null)";
         out << sb;
-        out << nl << "__os.writeSize(0);";
+        out << nl << "ostr.writeSize(0);";
         out << eb;
         out << nl << "else";
         out << sb;
-        out << nl << "__os.writeSize(" << v << ".size());";
+        out << nl << "ostr.writeSize(" << v << ".size());";
         string keyObjectS = typeToObjectString(key, TypeModeIn, package);
         string valueObjectS = typeToObjectString(value, TypeModeIn, package);
-        out << nl << "for(java.util.Map.Entry<" << keyObjectS << ", " << valueObjectS << "> __e : " << v
+        out << nl << "for(java.util.Map.Entry<" << keyObjectS << ", " << valueObjectS << "> e : " << v
             << ".entrySet())";
         out << sb;
         for(int i = 0; i < 2; i++)
@@ -2321,15 +2333,15 @@ Slice::JavaCompatGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
             TypePtr type;
             if(i == 0)
             {
-                arg = "__e.getKey()";
+                arg = "e.getKey()";
                 type = key;
             }
             else
             {
-                arg = "__e.getValue()";
+                arg = "e.getValue()";
                 type = value;
             }
-            writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, arg, true, iter, false);
+            writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, arg, true, iter, false, customStream);
         }
         out << eb;
         out << eb;
@@ -2337,8 +2349,8 @@ Slice::JavaCompatGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
     else
     {
         out << nl << v << " = new " << instanceType << "();";
-        out << nl << "int __sz" << iterS << " = __is.readSize();";
-        out << nl << "for(int __i" << iterS << " = 0; __i" << iterS << " < __sz" << iterS << "; __i" << iterS << "++)";
+        out << nl << "int sz" << iterS << " = " << stream << ".readSize();";
+        out << nl << "for(int i" << iterS << " = 0; i" << iterS << " < sz" << iterS << "; i" << iterS << "++)";
         out << sb;
         for(int i = 0; i < 2; i++)
         {
@@ -2347,13 +2359,13 @@ Slice::JavaCompatGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
             string typeS;
             if(i == 0)
             {
-                arg = "__key";
+                arg = "key";
                 type = key;
                 typeS = keyS;
             }
             else
             {
-                arg = "__value";
+                arg = "value";
                 type = value;
                 typeS = valueS;
             }
@@ -2364,9 +2376,9 @@ Slice::JavaCompatGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
                 string keyTypeStr = typeToObjectString(key, TypeModeIn, package);
                 string valueTypeStr = typeToObjectString(value, TypeModeIn, package);
                 writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, arg, false, iter, false,
-                                          StringList(),
+                                          customStream, StringList(),
                                           "new IceInternal.DictionaryPatcher<" + keyTypeStr + ", " + valueTypeStr +
-                                          ">(" + v + ", " + typeS + ".class, __key)");
+                                          ">(" + v + ", " + typeS + ".class, key)");
             }
             else
             {
@@ -2378,13 +2390,13 @@ Slice::JavaCompatGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
                 {
                     out << nl << typeS << ' ' << arg << ';';
                 }
-                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, arg, false, iter, false);
+                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, arg, false, iter, false, customStream);
             }
         }
         BuiltinPtr builtin = BuiltinPtr::dynamicCast(value);
         if(!(builtin && builtin->usesClasses()) && !ClassDeclPtr::dynamicCast(value))
         {
-            out << nl << "" << v << ".put(__key, __value);";
+            out << nl << "" << v << ".put(key, value);";
         }
         out << eb;
     }
@@ -2392,15 +2404,20 @@ Slice::JavaCompatGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
 
 void
 Slice::JavaCompatGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
-                                                         const string& package,
-                                                         const SequencePtr& seq,
-                                                         const string& param,
-                                                         bool marshal,
-                                                         int& iter,
-                                                         bool useHelper,
-                                                         const StringList& metaData)
+                                                              const string& package,
+                                                              const SequencePtr& seq,
+                                                              const string& param,
+                                                              bool marshal,
+                                                              int& iter,
+                                                              bool useHelper,
+                                                              const string& customStream,
+                                                              const StringList& metaData)
 {
-    string stream = marshal ? "__os" : "__is";
+    string stream = customStream;
+    if(stream.empty())
+    {
+        stream = marshal ? "ostr" : "istr";
+    }
     string v = param;
 
     //
@@ -2443,9 +2460,9 @@ Slice::JavaCompatGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                 out << sb;
                 out << nl << v << " = " << type << ".parseFrom(" << stream << ".readByteSeq());";
                 out << eb;
-                out << nl << "catch(com.google.protobuf.InvalidProtocolBufferException __ex)";
+                out << nl << "catch(com.google.protobuf.InvalidProtocolBufferException ex)";
                 out << sb;
-                out << nl << "throw new Ice.MarshalException(__ex);";
+                out << nl << "throw new Ice.MarshalException(ex);";
                 out << eb;
             }
             return;
@@ -2641,9 +2658,9 @@ Slice::JavaCompatGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
             out << sb;
             out << nl << stream << ".writeSize(" << v << ".size());";
             string typeS = typeToString(type, TypeModeIn, package);
-            out << nl << "for(" << typeS << " __elem : " << v << ')';
+            out << nl << "for(" << typeS << " elem : " << v << ')';
             out << sb;
-            writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "__elem", true, iter, false);
+            writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "elem", true, iter, false, customStream);
             out << eb;
             out << eb; // else
         }
@@ -2656,9 +2673,9 @@ Slice::JavaCompatGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                 isObject = true;
             }
             out << nl << v << " = new " << instanceType << "();";
-            out << nl << "final int __len" << iter << " = " << stream << ".readAndCheckSeqSize(" << type->minWireSize()
+            out << nl << "final int len" << iter << " = " << stream << ".readAndCheckSeqSize(" << type->minWireSize()
                 << ");";
-            out << nl << "for(int __i" << iter << " = 0; __i" << iter << " < __len" << iter << "; __i" << iter
+            out << nl << "for(int i" << iter << " = 0; i" << iter << " < len" << iter << "; i" << iter
                 << "++)";
             out << sb;
             if(isObject)
@@ -2669,25 +2686,25 @@ Slice::JavaCompatGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                 out << nl << v << ".add(null);";
                 ostringstream patchParams;
                 patchParams << "new IceInternal.ListPatcher<" << origContentS << ">(" << v << ", " << origContentS
-                            << ".class, __i" << iter << ')';
-                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "__elem", false, iter,
-                                          false, StringList(), patchParams.str());
+                            << ".class, i" << iter << ')';
+                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "elem", false, iter,
+                                          false, customStream, StringList(), patchParams.str());
             }
             else
             {
                 if(StructPtr::dynamicCast(type))
                 {
-                    out << nl << cont << " __elem = null;";
+                    out << nl << cont << " elem = null;";
                 }
                 else
                 {
-                    out << nl << cont << " __elem;";
+                    out << nl << cont << " elem;";
                 }
-                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "__elem", false, iter, false);
+                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "elem", false, iter, false, customStream);
             }
             if(!isObject)
             {
-                out << nl << v << ".add(__elem);";
+                out << nl << v << ".add(elem);";
             }
             out << eb;
             iter++;
@@ -2819,13 +2836,13 @@ Slice::JavaCompatGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                 out << nl << "else";
                 out << sb;
                 out << nl << stream << ".writeSize(" << v << ".length);";
-                out << nl << "for(int __i" << iter << " = 0; __i" << iter << " < " << v << ".length; __i" << iter
+                out << nl << "for(int i" << iter << " = 0; i" << iter << " < " << v << ".length; i" << iter
                     << "++)";
                 out << sb;
                 ostringstream o;
-                o << v << "[__i" << iter << "]";
+                o << v << "[i" << iter << "]";
                 iter++;
-                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, o.str(), true, iter, false);
+                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, o.str(), true, iter, false, customStream);
                 out << eb;
                 out << eb;
             }
@@ -2837,7 +2854,7 @@ Slice::JavaCompatGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                 {
                     isObject = true;
                 }
-                out << nl << "final int __len" << iter << " = " << stream << ".readAndCheckSeqSize("
+                out << nl << "final int len" << iter << " = " << stream << ".readAndCheckSeqSize("
                     << type->minWireSize() << ");";
                 //
                 // We cannot allocate an array of a generic type, such as
@@ -2868,11 +2885,11 @@ Slice::JavaCompatGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                     {
                         out << "[]";
                     }
-                    out << ")new " << nonGenericType << "[__len" << iter << "]";
+                    out << ")new " << nonGenericType << "[len" << iter << "]";
                 }
                 else
                 {
-                    out << nl << v << " = new " << origContentS << "[__len" << iter << "]";
+                    out << nl << v << " = new " << origContentS << "[len" << iter << "]";
                 }
                 int d = depth;
                 while(d--)
@@ -2880,22 +2897,23 @@ Slice::JavaCompatGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                     out << "[]";
                 }
                 out << ';';
-                out << nl << "for(int __i" << iter << " = 0; __i" << iter << " < __len" << iter << "; __i" << iter
+                out << nl << "for(int i" << iter << " = 0; i" << iter << " < len" << iter << "; i" << iter
                     << "++)";
                 out << sb;
                 ostringstream o;
-                o << v << "[__i" << iter << "]";
+                o << v << "[i" << iter << "]";
                 ostringstream patchParams;
                 if(isObject)
                 {
                     patchParams << "new IceInternal.SequencePatcher(" << v << ", " << origContentS
-                                << ".class, __i" << iter << ')';
+                                << ".class, i" << iter << ')';
                     writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, o.str(), false, iter,
-                                              false, StringList(), patchParams.str());
+                                              false, customStream, StringList(), patchParams.str());
                 }
                 else
                 {
-                    writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, o.str(), false, iter, false);
+                    writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, o.str(), false,
+                                              iter, false, customStream);
                 }
                 out << eb;
                 iter++;
@@ -3361,15 +3379,15 @@ Slice::JavaGenerator::getStaticId(const TypePtr& type, const string& package) co
 
     if(b && b->kind() == Builtin::KindObject)
     {
-        return "com.zeroc.Ice.Object.ice_staticId";
+        return "com.zeroc.Ice.Object.ice_staticId()";
     }
     else if(b && b->kind() == Builtin::KindValue)
     {
-        return "com.zeroc.Ice.Value.ice_staticId";
+        return "com.zeroc.Ice.Value.ice_staticId()";
     }
     else
     {
-        return getAbsolute(cl, package) + ".ice_staticId";
+        return getAbsolute(cl, package) + ".ice_staticId()";
     }
 }
 
@@ -3695,10 +3713,15 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                                                 const string& param,
                                                 bool marshal,
                                                 int& iter,
+                                                const string& customStream,
                                                 const StringList& metaData,
                                                 const string& patchParams)
 {
-    const string stream = marshal ? "__os" : "__is";
+    string stream = customStream;
+    if(stream.empty())
+    {
+        stream = marshal ? "ostr" : "istr";
+    }
     const bool optionalParam = mode == OptionalInParam || mode == OptionalOutParam || mode == OptionalReturnParam;
 
     const BuiltinPtr builtin = BuiltinPtr::dynamicCast(type);
@@ -3952,9 +3975,9 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                     }
                     else if(mode == OptionalMember)
                     {
-                        out << nl << "int __pos = " << stream << ".startSize();";
+                        out << nl << "int pos = " << stream << ".startSize();";
                         out << nl << stream << ".writeProxy(" << param << ");";
-                        out << nl << stream << ".endSize(__pos);";
+                        out << nl << stream << ".endSize(pos);";
                     }
                     else
                     {
@@ -4001,26 +4024,26 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                     out << nl << "if(" << param << " != null && " << param << ".isPresent() && " << stream
                         << ".writeOptional(" << tag << ", " << getOptionalFormat(type) << "))";
                     out << sb;
-                    out << nl << "int __pos = " << stream << ".startSize();";
+                    out << nl << "int pos = " << stream << ".startSize();";
                     out << nl << stream << ".writeProxy(" << param << ".get());";
-                    out << nl << stream << ".endSize(__pos);";
+                    out << nl << stream << ".endSize(pos);";
                     out << eb;
                 }
                 else
                 {
                     out << nl << "if(" << stream << ".writeOptional(" << tag << ", " << getOptionalFormat(type) << "))";
                     out << sb;
-                    out << nl << "int __pos = " << stream << ".startSize();";
+                    out << nl << "int pos = " << stream << ".startSize();";
                     out << nl << stream << ".writeProxy(" << param << ");";
-                    out << nl << stream << ".endSize(__pos);";
+                    out << nl << stream << ".endSize(pos);";
                     out << eb;
                 }
             }
             else if(mode == OptionalMember)
             {
-                out << nl << "int __pos = " << stream << ".startSize();";
+                out << nl << "int pos = " << stream << ".startSize();";
                 out << nl << stream << ".writeProxy(" << param << ");";
-                out << nl << stream << ".endSize(__pos);";
+                out << nl << stream << ".endSize(pos);";
             }
             else
             {
@@ -4116,9 +4139,9 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
 
                 if(st->isVariableLength())
                 {
-                    out << nl << "int __pos = " <<  stream << ".startSize();";
+                    out << nl << "int pos = " <<  stream << ".startSize();";
                     out << nl << typeS << ".write(" << stream << ", " << val << ");";
-                    out << nl << stream << ".endSize(__pos);";
+                    out << nl << stream << ".endSize(pos);";
                 }
                 else
                 {
@@ -4260,9 +4283,9 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                 if(keyType->isVariableLength() || valueType->isVariableLength())
                 {
                     string d = optionalParam && optionalMapping ? param + ".get()" : param;
-                    out << nl << "int __pos = " <<  stream << ".startSize();";
-                    writeDictionaryMarshalUnmarshalCode(out, package, dict, d, marshal, iter, true, metaData);
-                    out << nl << stream << ".endSize(__pos);";
+                    out << nl << "int pos = " <<  stream << ".startSize();";
+                    writeDictionaryMarshalUnmarshalCode(out, package, dict, d, marshal, iter, true, customStream, metaData);
+                    out << nl << stream << ".endSize(pos);";
                 }
                 else
                 {
@@ -4270,17 +4293,17 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                     string tmpName;
                     if(optionalParam && optionalMapping)
                     {
-                        tmpName = "__optDict";
+                        tmpName = "optDict";
                         out << nl << "final " << typeS << ' ' << tmpName << " = " << param << ".get();";
                     }
                     else
                     {
                         tmpName = param;
                     }
-                    out << nl << "final int __optSize = " << tmpName << " == null ? 0 : " << tmpName << ".size();";
-                    out << nl << stream << ".writeSize(__optSize > 254 ? __optSize * " << wireSize
-                        << " + 5 : __optSize * " << wireSize << " + 1);";
-                    writeDictionaryMarshalUnmarshalCode(out, package, dict, tmpName, marshal, iter, true, metaData);
+                    out << nl << "final int optSize = " << tmpName << " == null ? 0 : " << tmpName << ".size();";
+                    out << nl << stream << ".writeSize(optSize > 254 ? optSize * " << wireSize
+                        << " + 5 : optSize * " << wireSize << " + 1);";
+                    writeDictionaryMarshalUnmarshalCode(out, package, dict, tmpName, marshal, iter, true, customStream, metaData);
                 }
 
                 if(optionalParam)
@@ -4294,7 +4317,7 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
 
                 if(optionalParam)
                 {
-                    tmpName = "__optDict";
+                    tmpName = "optDict";
                     out << nl << "if(" << stream << ".readOptional(" << tag << ", " << getOptionalFormat(type) << "))";
                     out << sb;
                     out << nl << typeS << ' ' << tmpName << ';';
@@ -4313,7 +4336,7 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                     out << nl << stream << ".skipSize();";
                 }
 
-                writeDictionaryMarshalUnmarshalCode(out, package, dict, tmpName, marshal, iter, true, metaData);
+                writeDictionaryMarshalUnmarshalCode(out, package, dict, tmpName, marshal, iter, true, customStream, metaData);
 
                 if(optionalParam)
                 {
@@ -4328,7 +4351,7 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
         }
         else
         {
-            writeDictionaryMarshalUnmarshalCode(out, package, dict, param, marshal, iter, true, metaData);
+            writeDictionaryMarshalUnmarshalCode(out, package, dict, param, marshal, iter, true, customStream, metaData);
         }
         return;
     }
@@ -4419,9 +4442,9 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                 if(elemType->isVariableLength())
                 {
                     string s = optionalParam && optionalMapping ? param + ".get()" : param;
-                    out << nl << "int __pos = " <<  stream << ".startSize();";
-                    writeSequenceMarshalUnmarshalCode(out, package, seq, s, marshal, iter, true, metaData);
-                    out << nl << stream << ".endSize(__pos);";
+                    out << nl << "int pos = " <<  stream << ".startSize();";
+                    writeSequenceMarshalUnmarshalCode(out, package, seq, s, marshal, iter, true, customStream, metaData);
+                    out << nl << stream << ".endSize(pos);";
                 }
                 else if(findMetaData("java:type:", metaData, ignore) ||
                         findMetaData("java:type:", seq->getMetaData(), ignore))
@@ -4434,7 +4457,7 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                     string tmpName;
                     if(optionalParam && optionalMapping)
                     {
-                        tmpName = "__optSeq";
+                        tmpName = "optSeq";
                         out << nl << "final " << typeS << ' ' << tmpName << " = " << param << ".get();";
                     }
                     else
@@ -4444,11 +4467,11 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
 
                     if(wireSize > 1)
                     {
-                        out << nl << "final int __optSize = " << tmpName << " == null ? 0 : " << tmpName << ".size();";
-                        out << nl << stream << ".writeSize(__optSize > 254 ? __optSize * " << wireSize
-                            << " + 5 : __optSize * " << wireSize << " + 1);";
+                        out << nl << "final int optSize = " << tmpName << " == null ? 0 : " << tmpName << ".size();";
+                        out << nl << stream << ".writeSize(optSize > 254 ? optSize * " << wireSize
+                            << " + 5 : optSize * " << wireSize << " + 1);";
                     }
-                    writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, metaData);
+                    writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, customStream, metaData);
                 }
                 else if(findMetaData("java:protobuf:", seq->getMetaData(), ignore) ||
                         findMetaData("java:serializable:", seq->getMetaData(), ignore))
@@ -4457,7 +4480,7 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                     // This just writes a byte sequence.
                     //
                     string s = optionalParam && optionalMapping ? param + ".get()" : param;
-                    writeSequenceMarshalUnmarshalCode(out, package, seq, s, marshal, iter, true, metaData);
+                    writeSequenceMarshalUnmarshalCode(out, package, seq, s, marshal, iter, true, customStream, metaData);
                 }
                 else
                 {
@@ -4468,7 +4491,7 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                     string tmpName;
                     if(optionalParam && optionalMapping)
                     {
-                        tmpName = "__optSeq";
+                        tmpName = "optSeq";
                         out << nl << "final " << typeS << ' ' << tmpName << " = " << param << ".get();";
                     }
                     else
@@ -4478,12 +4501,12 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
 
                     if(wireSize > 1)
                     {
-                        out << nl << "final int __optSize = " << tmpName << " == null ? 0 : " << tmpName << ".length;";
-                        out << nl << stream << ".writeSize(__optSize > 254 ? __optSize * " << wireSize
-                            << " + 5 : __optSize * " << wireSize << " + 1);";
+                        out << nl << "final int optSize = " << tmpName << " == null ? 0 : " << tmpName << ".length;";
+                        out << nl << stream << ".writeSize(optSize > 254 ? optSize * " << wireSize
+                            << " + 5 : optSize * " << wireSize << " + 1);";
                     }
 
-                    writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, metaData);
+                    writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, customStream, metaData);
                 }
 
                 if(optionalParam)
@@ -4496,7 +4519,7 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                 string tmpName;
                 if(optionalParam)
                 {
-                    tmpName = "__optSeq";
+                    tmpName = "optSeq";
                     out << nl << "if(" << stream << ".readOptional(" << tag << ", " << getOptionalFormat(type) << "))";
                     out << sb;
                     out << nl << typeS << ' ' << tmpName << ';';
@@ -4528,7 +4551,7 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
                     }
                 }
 
-                writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, metaData);
+                writeSequenceMarshalUnmarshalCode(out, package, seq, tmpName, marshal, iter, true, customStream, metaData);
 
                 if(optionalParam)
                 {
@@ -4543,7 +4566,7 @@ Slice::JavaGenerator::writeMarshalUnmarshalCode(Output& out,
         }
         else
         {
-            writeSequenceMarshalUnmarshalCode(out, package, seq, param, marshal, iter, true, metaData);
+            writeSequenceMarshalUnmarshalCode(out, package, seq, param, marshal, iter, true, customStream, metaData);
         }
         return;
     }
@@ -4569,9 +4592,15 @@ Slice::JavaGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
                                                           bool marshal,
                                                           int& iter,
                                                           bool useHelper,
+                                                          const string& customStream,
                                                           const StringList& metaData)
 {
-    string stream = marshal ? "__os" : "__is";
+    string stream = customStream;
+    if(stream.empty())
+    {
+        stream = marshal ? "ostr" : "istr";
+    }
+
     string v = param;
 
     string instanceType;
@@ -4631,14 +4660,14 @@ Slice::JavaGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
     {
         out << nl << "if(" << v << " == null)";
         out << sb;
-        out << nl << "__os.writeSize(0);";
+        out << nl << "ostr.writeSize(0);";
         out << eb;
         out << nl << "else";
         out << sb;
-        out << nl << "__os.writeSize(" << v << ".size());";
+        out << nl << "ostr.writeSize(" << v << ".size());";
         string keyObjectS = typeToObjectString(key, TypeModeIn, package);
         string valueObjectS = typeToObjectString(value, TypeModeIn, package);
-        out << nl << "for(java.util.Map.Entry<" << keyObjectS << ", " << valueObjectS << "> __e : " << v
+        out << nl << "for(java.util.Map.Entry<" << keyObjectS << ", " << valueObjectS << "> e : " << v
             << ".entrySet())";
         out << sb;
         for(int i = 0; i < 2; i++)
@@ -4647,15 +4676,15 @@ Slice::JavaGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
             TypePtr type;
             if(i == 0)
             {
-                arg = "__e.getKey()";
+                arg = "e.getKey()";
                 type = key;
             }
             else
             {
-                arg = "__e.getValue()";
+                arg = "e.getValue()";
                 type = value;
             }
-            writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, arg, true, iter);
+            writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, arg, true, iter, customStream);
         }
         out << eb;
         out << eb;
@@ -4663,8 +4692,8 @@ Slice::JavaGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
     else
     {
         out << nl << v << " = new " << instanceType << "();";
-        out << nl << "int __sz" << iterS << " = __is.readSize();";
-        out << nl << "for(int __i" << iterS << " = 0; __i" << iterS << " < __sz" << iterS << "; __i" << iterS << "++)";
+        out << nl << "int sz" << iterS << " = " << stream << ".readSize();";
+        out << nl << "for(int i" << iterS << " = 0; i" << iterS << " < sz" << iterS << "; i" << iterS << "++)";
         out << sb;
         for(int i = 0; i < 2; i++)
         {
@@ -4673,13 +4702,13 @@ Slice::JavaGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
             string typeS;
             if(i == 0)
             {
-                arg = "__key";
+                arg = "key";
                 type = key;
                 typeS = keyS;
             }
             else
             {
-                arg = "__value";
+                arg = "value";
                 type = value;
                 typeS = valueS;
             }
@@ -4689,10 +4718,10 @@ Slice::JavaGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
             {
                 string keyTypeStr = typeToObjectString(key, TypeModeIn, package);
                 string valueTypeStr = typeToObjectString(value, TypeModeIn, package);
-                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, arg, false, iter, StringList(),
+                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, arg, false, iter, customStream, StringList(),
                                           "new com.zeroc.IceInternal.DictionaryPatcher<" + keyTypeStr + ", " +
                                           valueTypeStr + ">(" + v + ", " + typeS + ".class, " + typeS +
-                                          ".ice_staticId, __key)");
+                                          ".ice_staticId(), key)");
             }
             else
             {
@@ -4704,13 +4733,13 @@ Slice::JavaGenerator::writeDictionaryMarshalUnmarshalCode(Output& out,
                 {
                     out << nl << typeS << ' ' << arg << ';';
                 }
-                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, arg, false, iter);
+                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, arg, false, iter, customStream);
             }
         }
         BuiltinPtr builtin = BuiltinPtr::dynamicCast(value);
         if(!(builtin && builtin->usesClasses()) && !ClassDeclPtr::dynamicCast(value))
         {
-            out << nl << "" << v << ".put(__key, __value);";
+            out << nl << "" << v << ".put(key, value);";
         }
         out << eb;
     }
@@ -4724,9 +4753,15 @@ Slice::JavaGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                                                         bool marshal,
                                                         int& iter,
                                                         bool useHelper,
+                                                        const string& customStream,
                                                         const StringList& metaData)
 {
-    string stream = marshal ? "__os" : "__is";
+    string stream = customStream;
+    if(stream.empty())
+    {
+        stream = marshal ? "ostr" : "istr";
+    }
+
     string v = param;
 
     //
@@ -4769,9 +4804,9 @@ Slice::JavaGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                 out << sb;
                 out << nl << v << " = " << type << ".parseFrom(" << stream << ".readByteSeq());";
                 out << eb;
-                out << nl << "catch(com.google.protobuf.InvalidProtocolBufferException __ex)";
+                out << nl << "catch(com.google.protobuf.InvalidProtocolBufferException ex)";
                 out << sb;
-                out << nl << "throw new com.zeroc.Ice.MarshalException(__ex);";
+                out << nl << "throw new com.zeroc.Ice.MarshalException(ex);";
                 out << eb;
             }
             return;
@@ -4967,9 +5002,9 @@ Slice::JavaGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
             out << sb;
             out << nl << stream << ".writeSize(" << v << ".size());";
             string typeS = typeToString(type, TypeModeIn, package);
-            out << nl << "for(" << typeS << " __elem : " << v << ')';
+            out << nl << "for(" << typeS << " elem : " << v << ')';
             out << sb;
-            writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "__elem", true, iter);
+            writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "elem", true, iter, customStream);
             out << eb;
             out << eb; // else
         }
@@ -4982,9 +5017,9 @@ Slice::JavaGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                 isObject = true;
             }
             out << nl << v << " = new " << instanceType << "();";
-            out << nl << "final int __len" << iter << " = " << stream << ".readAndCheckSeqSize(" << type->minWireSize()
+            out << nl << "final int len" << iter << " = " << stream << ".readAndCheckSeqSize(" << type->minWireSize()
                 << ");";
-            out << nl << "for(int __i" << iter << " = 0; __i" << iter << " < __len" << iter << "; __i" << iter
+            out << nl << "for(int i" << iter << " = 0; i" << iter << " < len" << iter << "; i" << iter
                 << "++)";
             out << sb;
             if(isObject)
@@ -4995,25 +5030,25 @@ Slice::JavaGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                 out << nl << v << ".add(null);";
                 ostringstream patchParams;
                 patchParams << "new com.zeroc.IceInternal.ListPatcher<" << origContentS << ">(" << v << ", "
-                            << origContentS << ".class, " << origContentS << ".ice_staticId, __i" << iter << ')';
-                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "__elem", false, iter,
-                                          StringList(), patchParams.str());
+                            << origContentS << ".class, " << origContentS << ".ice_staticId(), i" << iter << ')';
+                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "elem", false, iter,
+                                          customStream, StringList(), patchParams.str());
             }
             else
             {
                 if(StructPtr::dynamicCast(type))
                 {
-                    out << nl << cont << " __elem = null;";
+                    out << nl << cont << " elem = null;";
                 }
                 else
                 {
-                    out << nl << cont << " __elem;";
+                    out << nl << cont << " elem;";
                 }
-                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "__elem", false, iter);
+                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, "elem", false, iter, customStream);
             }
             if(!isObject)
             {
-                out << nl << v << ".add(__elem);";
+                out << nl << v << ".add(elem);";
             }
             out << eb;
             iter++;
@@ -5145,13 +5180,13 @@ Slice::JavaGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                 out << nl << "else";
                 out << sb;
                 out << nl << stream << ".writeSize(" << v << ".length);";
-                out << nl << "for(int __i" << iter << " = 0; __i" << iter << " < " << v << ".length; __i" << iter
+                out << nl << "for(int i" << iter << " = 0; i" << iter << " < " << v << ".length; i" << iter
                     << "++)";
                 out << sb;
                 ostringstream o;
-                o << v << "[__i" << iter << "]";
+                o << v << "[i" << iter << "]";
                 iter++;
-                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, o.str(), true, iter);
+                writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, o.str(), true, iter, customStream);
                 out << eb;
                 out << eb;
             }
@@ -5163,7 +5198,7 @@ Slice::JavaGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                 {
                     isObject = true;
                 }
-                out << nl << "final int __len" << iter << " = " << stream << ".readAndCheckSeqSize("
+                out << nl << "final int len" << iter << " = " << stream << ".readAndCheckSeqSize("
                     << type->minWireSize() << ");";
                 //
                 // We cannot allocate an array of a generic type, such as
@@ -5194,11 +5229,11 @@ Slice::JavaGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                     {
                         out << "[]";
                     }
-                    out << ")new " << nonGenericType << "[__len" << iter << "]";
+                    out << ")new " << nonGenericType << "[len" << iter << "]";
                 }
                 else
                 {
-                    out << nl << v << " = new " << origContentS << "[__len" << iter << "]";
+                    out << nl << v << " = new " << origContentS << "[len" << iter << "]";
                 }
                 int d = depth;
                 while(d--)
@@ -5206,23 +5241,23 @@ Slice::JavaGenerator::writeSequenceMarshalUnmarshalCode(Output& out,
                     out << "[]";
                 }
                 out << ';';
-                out << nl << "for(int __i" << iter << " = 0; __i" << iter << " < __len" << iter << "; __i" << iter
+                out << nl << "for(int i" << iter << " = 0; i" << iter << " < len" << iter << "; i" << iter
                     << "++)";
                 out << sb;
                 ostringstream o;
-                o << v << "[__i" << iter << "]";
+                o << v << "[i" << iter << "]";
                 if(isObject)
                 {
                     ostringstream patchParams;
                     patchParams << "new com.zeroc.IceInternal.SequencePatcher<" << origContentS << ">(" << v << ", "
-                                << origContentS << ".class, " << origContentS << ".ice_staticId, __i" << iter
+                                << origContentS << ".class, " << origContentS << ".ice_staticId(), i" << iter
                                 << ')';
                     writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, o.str(), false, iter,
-                                              StringList(), patchParams.str());
+                                              customStream, StringList(), patchParams.str());
                 }
                 else
                 {
-                    writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, o.str(), false, iter);
+                    writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, o.str(), false, iter, customStream);
                 }
                 out << eb;
                 iter++;
diff --git a/cpp/src/Slice/JavaUtil.h b/cpp/src/Slice/JavaUtil.h
index d9375be077e..fcc77d30f63 100644
--- a/cpp/src/Slice/JavaUtil.h
+++ b/cpp/src/Slice/JavaUtil.h
@@ -168,21 +168,22 @@ protected:
     };
 
     void writeMarshalUnmarshalCode(::IceUtilInternal::Output&, const std::string&, const TypePtr&, OptionalMode,
-                                   bool, int, const std::string&, bool, int&, bool = false,
-                                   const StringList& = StringList(), const std::string& patchParams = "");
+                                   bool, int, const std::string&, bool, int&, bool = false, const std::string& = "",
+                                   const StringList& = StringList(), const std::string& = "");
 
     //
     // Generate code to marshal or unmarshal a dictionary type.
     //
     void writeDictionaryMarshalUnmarshalCode(::IceUtilInternal::Output&, const std::string&, const DictionaryPtr&,
-                                           const std::string&, bool, int&, bool,
-                                           const StringList& = StringList());
+                                             const std::string&, bool, int&, bool,
+                                             const std::string& = "", const StringList& = StringList());
 
     //
     // Generate code to marshal or unmarshal a sequence type.
     //
     void writeSequenceMarshalUnmarshalCode(::IceUtilInternal::Output&, const std::string&, const SequencePtr&,
-                                           const std::string&, bool, int&, bool, const StringList& = StringList());
+                                           const std::string&, bool, int&, bool,
+                                           const std::string& = "", const StringList& = StringList());
 
     //
     // Search metadata for an entry with the given prefix and return the entire string.
@@ -334,21 +335,22 @@ protected:
     };
 
     void writeMarshalUnmarshalCode(::IceUtilInternal::Output&, const std::string&, const TypePtr&, OptionalMode,
-                                   bool, int, const std::string&, bool, int&, const StringList& = StringList(),
-                                   const std::string& patchParams = "");
+                                   bool, int, const std::string&, bool, int&, const std::string& = "",
+                                   const StringList& = StringList(), const std::string& = "");
 
     //
     // Generate code to marshal or unmarshal a dictionary type.
     //
     void writeDictionaryMarshalUnmarshalCode(::IceUtilInternal::Output&, const std::string&, const DictionaryPtr&,
                                              const std::string&, bool, int&, bool,
-                                             const StringList& = StringList());
+                                             const std::string& = "", const StringList& = StringList());
 
     //
     // Generate code to marshal or unmarshal a sequence type.
     //
     void writeSequenceMarshalUnmarshalCode(::IceUtilInternal::Output&, const std::string&, const SequencePtr&,
-                                           const std::string&, bool, int&, bool, const StringList& = StringList());
+                                           const std::string&, bool, int&, bool,
+                                           const std::string& = "", const StringList& = StringList());
 
     //
     // Search metadata for an entry with the given prefix and return the entire string.
diff --git a/cpp/src/slice2java/Gen.cpp b/cpp/src/slice2java/Gen.cpp
index 8c3769c0fb6..0e196df0626 100644
--- a/cpp/src/slice2java/Gen.cpp
+++ b/cpp/src/slice2java/Gen.cpp
@@ -70,6 +70,21 @@ opFormatTypeToString(const OperationPtr& op)
     return format;
 }
 
+string
+getEscapedParamName(const OperationPtr& p, const string& name)
+{
+    ParamDeclList params = p->parameters();
+
+    for(ParamDeclList::const_iterator i = params.begin(); i != params.end(); ++i)
+    {
+        if((*i)->name() == name)
+        {
+            return name + "_";
+        }
+    }
+    return name;
+}
+
 bool
 isDeprecated(const ContainedPtr& p1, const ContainedPtr& p2)
 {
@@ -292,20 +307,20 @@ Slice::JavaVisitor::writeResultType(Output& out, const OperationPtr& op, const s
         ParamDeclList required, optional;
         op->outParameters(required, optional);
 
-        out << sp << nl << "public void write(com.zeroc.Ice.OutputStream __os)";
+        out << sp << nl << "public void write(com.zeroc.Ice.OutputStream ostr)";
         out << sb;
 
         int iter = 0;
         for(ParamDeclList::const_iterator pli = required.begin(); pli != required.end(); ++pli)
         {
             const string paramName = fixKwd((*pli)->name());
-            writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalNone, false, 0, paramName, true, iter,
+            writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalNone, false, 0, paramName, true, iter, "",
                                       (*pli)->getMetaData());
         }
 
         if(ret && !op->returnIsOptional())
         {
-            writeMarshalUnmarshalCode(out, package, ret, OptionalNone, false, 0, retval, true, iter, op->getMetaData());
+            writeMarshalUnmarshalCode(out, package, ret, OptionalNone, false, 0, retval, true, iter, "", op->getMetaData());
         }
 
         //
@@ -318,24 +333,24 @@ Slice::JavaVisitor::writeResultType(Output& out, const OperationPtr& op, const s
             if(checkReturnType && op->returnTag() < (*pli)->tag())
             {
                 writeMarshalUnmarshalCode(out, package, ret, OptionalReturnParam, true, op->returnTag(), retval, true,
-                                          iter, op->getMetaData());
+                                          iter, "", op->getMetaData());
                 checkReturnType = false;
             }
 
             const string paramName = fixKwd((*pli)->name());
             writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalOutParam, true, (*pli)->tag(), paramName,
-                                      true, iter, (*pli)->getMetaData());
+                                      true, iter, "", (*pli)->getMetaData());
         }
 
         if(checkReturnType)
         {
             writeMarshalUnmarshalCode(out, package, ret, OptionalReturnParam, true, op->returnTag(), retval, true, iter,
-                                      op->getMetaData());
+                                      "", op->getMetaData());
         }
 
         out << eb;
 
-        out << sp << nl << "public void read(com.zeroc.Ice.InputStream __is)";
+        out << sp << nl << "public void read(com.zeroc.Ice.InputStream istr)";
         out << sb;
 
         iter = 0;
@@ -344,13 +359,13 @@ Slice::JavaVisitor::writeResultType(Output& out, const OperationPtr& op, const s
             const string paramName = fixKwd((*pli)->name());
             const string patchParams = getPatcher((*pli)->type(), package, paramName, false);
             writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalNone, false, 0, paramName, false, iter,
-                                      (*pli)->getMetaData(), patchParams);
+                                      "", (*pli)->getMetaData(), patchParams);
         }
 
         if(ret && !op->returnIsOptional())
         {
             const string patchParams = getPatcher(ret, package, retval, false);
-            writeMarshalUnmarshalCode(out, package, ret, OptionalNone, false, 0, retval, false, iter, op->getMetaData(),
+            writeMarshalUnmarshalCode(out, package, ret, OptionalNone, false, 0, retval, false, iter, "", op->getMetaData(),
                                       patchParams);
         }
 
@@ -365,21 +380,21 @@ Slice::JavaVisitor::writeResultType(Output& out, const OperationPtr& op, const s
             {
                 const string patchParams = getPatcher(ret, package, retval, true);
                 writeMarshalUnmarshalCode(out, package, ret, OptionalReturnParam, true, op->returnTag(), retval, false,
-                                          iter, op->getMetaData(), patchParams);
+                                          iter, "", op->getMetaData(), patchParams);
                 checkReturnType = false;
             }
 
             const string paramName = fixKwd((*pli)->name());
             const string patchParams = getPatcher((*pli)->type(), package, paramName, true);
             writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalOutParam, true, (*pli)->tag(), paramName,
-                                      false, iter, (*pli)->getMetaData(), patchParams);
+                                      false, iter, "", (*pli)->getMetaData(), patchParams);
         }
 
         if(checkReturnType)
         {
             const string patchParams = getPatcher(ret, package, retval, true);
             writeMarshalUnmarshalCode(out, package, ret, OptionalReturnParam, true, op->returnTag(), retval, false,
-                                      iter, op->getMetaData(), patchParams);
+                                      iter, "", op->getMetaData(), patchParams);
         }
 
         out << eb;
@@ -402,7 +417,9 @@ Slice::JavaVisitor::writeMarshaledResultType(Output& out, const OperationPtr& op
     const ClassDefPtr cl = ClassDefPtr::dynamicCast(op->container());
     assert(cl);
     const ParamDeclList outParams = op->outParameters();
-    const string retval = "__ret";
+    const string retval = getEscapedParamName(op, "returnValue");
+    const string currentParamName = getEscapedParamName(op, "current");
+    const string currentParam = "com.zeroc.Ice.Current " + currentParamName;
 
     out << sp;
 
@@ -429,7 +446,7 @@ Slice::JavaVisitor::writeMarshaledResultType(Output& out, const OperationPtr& op
                 writeDocCommentLines(out, q->second);
             }
         }
-        out << nl << " * @param __current The Current object for the invocation.";
+        out << nl << " * @param " << currentParamName << " The Current object for the invocation.";
         out << nl << " **/";
     }
 
@@ -444,10 +461,10 @@ Slice::JavaVisitor::writeMarshaledResultType(Output& out, const OperationPtr& op
         out << (typeToString((*p)->type(), TypeModeIn, package, (*p)->getMetaData(), true, (*p)->optional(),
                              cl->isLocal()) + " " + fixKwd((*p)->name()));
     }
-    out << "com.zeroc.Ice.Current __current" << epar;
+    out << currentParam << epar;
     out << sb;
-    out << nl << "__os = com.zeroc.IceInternal.Incoming.createResponseOutputStream(__current);";
-    out << nl << "__os.startEncapsulation(__current.encoding, " << opFormatTypeToString(op) << ");";
+    out << nl << "_ostr = com.zeroc.IceInternal.Incoming.createResponseOutputStream(" << currentParamName << ");";
+    out << nl << "_ostr.startEncapsulation(" << currentParamName << ".encoding, " << opFormatTypeToString(op) << ");";
 
     ParamDeclList required, optional;
     op->outParameters(required, optional);
@@ -456,12 +473,13 @@ Slice::JavaVisitor::writeMarshaledResultType(Output& out, const OperationPtr& op
     {
         const string paramName = fixKwd((*pli)->name());
         writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalNone, false, 0, paramName, true, iter,
-                                  (*pli)->getMetaData());
+                                  "_ostr", (*pli)->getMetaData());
     }
 
     if(ret && !op->returnIsOptional())
     {
-        writeMarshalUnmarshalCode(out, package, ret, OptionalNone, false, 0, retval, true, iter, op->getMetaData());
+        writeMarshalUnmarshalCode(out, package, ret, OptionalNone, false, 0, retval, true, iter, "_ostr",
+                                  op->getMetaData());
     }
 
     //
@@ -474,27 +492,27 @@ Slice::JavaVisitor::writeMarshaledResultType(Output& out, const OperationPtr& op
         if(checkReturnType && op->returnTag() < (*pli)->tag())
         {
             writeMarshalUnmarshalCode(out, package, ret, OptionalReturnParam, true, op->returnTag(), retval, true,
-                                      iter, op->getMetaData());
+                                      iter, "_ostr", op->getMetaData());
             checkReturnType = false;
         }
 
         const string paramName = fixKwd((*pli)->name());
         writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalOutParam, true, (*pli)->tag(), paramName,
-                                  true, iter, (*pli)->getMetaData());
+                                  true, iter, "_ostr", (*pli)->getMetaData());
     }
 
     if(checkReturnType)
     {
         writeMarshalUnmarshalCode(out, package, ret, OptionalReturnParam, true, op->returnTag(), retval, true, iter,
-                                  op->getMetaData());
+                                  "_ostr", op->getMetaData());
     }
 
     if(op->returnsClasses(false))
     {
-        out << nl << "__os.writePendingValues();";
+        out << nl << "_ostr.writePendingValues();";
     }
 
-    out << nl << "__os.endEncapsulation();";
+    out << nl << "_ostr.endEncapsulation();";
 
     out << eb;
 
@@ -502,11 +520,11 @@ Slice::JavaVisitor::writeMarshaledResultType(Output& out, const OperationPtr& op
     out << nl << "@Override"
         << nl << "public com.zeroc.Ice.OutputStream getOutputStream()"
         << sb
-        << nl << "return __os;"
+        << nl << "return _ostr;"
         << eb;
 
     out << sp;
-    out << nl << "private com.zeroc.Ice.OutputStream __os;";
+    out << nl << "private com.zeroc.Ice.OutputStream _ostr;";
     out << eb;
 }
 
@@ -528,7 +546,7 @@ Slice::JavaVisitor::allocatePatcher(Output& out, const TypePtr& type, const stri
     }
 
     out << nl << "com.zeroc.IceInternal.Patcher<" << clsName << "> " << name << " = new com.zeroc.IceInternal.Patcher<"
-        << clsName << ">(" << clsName << ".class, " << clsName << ".ice_staticId);";
+        << clsName << ">(" << clsName << ".class, " << clsName << ".ice_staticId());";
 }
 
 string
@@ -550,14 +568,14 @@ Slice::JavaVisitor::getPatcher(const TypePtr& type, const string& package, const
         }
 
         ostr << "new com.zeroc.IceInternal.Patcher<" << clsName << ">(" << clsName << ".class, "
-             << clsName << ".ice_staticId, " << "__v -> ";
+             << clsName << ".ice_staticId(), " << "v -> ";
         if(optionalMapping)
         {
-            ostr << dest << " = java.util.Optional.ofNullable(__v)";
+            ostr << dest << " = java.util.Optional.ofNullable(v)";
         }
         else
         {
-            ostr << dest << " = __v";
+            ostr << dest << " = v";
         }
         ostr << ')';
     }
@@ -610,7 +628,7 @@ Slice::JavaVisitor::getParams(const OperationPtr& op, const string& package)
 }
 
 vector<string>
-Slice::JavaVisitor::getParamsProxy(const OperationPtr& op, const string& package, bool optionalMapping)
+Slice::JavaVisitor::getParamsProxy(const OperationPtr& op, const string& package, bool optionalMapping, bool internal)
 {
     vector<string> params;
 
@@ -619,7 +637,7 @@ Slice::JavaVisitor::getParamsProxy(const OperationPtr& op, const string& package
     {
         const string typeString = typeToString((*q)->type(), TypeModeIn, package, (*q)->getMetaData(), true,
                                                optionalMapping && (*q)->optional());
-        params.push_back(typeString + ' ' + fixKwd((*q)->name()));
+        params.push_back(typeString + ' ' + (internal ? "iceP_" + (*q)->name() : fixKwd((*q)->name())));
     }
 
     return params;
@@ -640,18 +658,14 @@ Slice::JavaVisitor::getArgs(const OperationPtr& op)
 }
 
 vector<string>
-Slice::JavaVisitor::getInArgs(const OperationPtr& op, bool patcher)
+Slice::JavaVisitor::getInArgs(const OperationPtr& op, bool internal)
 {
     vector<string> args;
 
     ParamDeclList paramList = op->inParameters();
     for(ParamDeclList::const_iterator q = paramList.begin(); q != paramList.end(); ++q)
     {
-        string s = fixKwd((*q)->name());
-        if(patcher && isValue((*q)->type()))
-        {
-            s += ".value";
-        }
+        string s = internal ? "iceP_" + (*q)->name() : fixKwd((*q)->name());
         args.push_back(s);
     }
 
@@ -667,9 +681,9 @@ Slice::JavaVisitor::writeMarshalProxyParams(Output& out, const string& package,
     op->inParameters(required, optional);
     for(ParamDeclList::const_iterator pli = required.begin(); pli != required.end(); ++pli)
     {
-        string paramName = fixKwd((*pli)->name());
+        string paramName = "iceP_" + (*pli)->name();
         writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalNone, false, 0, paramName, true,
-                                  iter, (*pli)->getMetaData());
+                                  iter, "", (*pli)->getMetaData());
     }
 
     //
@@ -678,12 +692,12 @@ Slice::JavaVisitor::writeMarshalProxyParams(Output& out, const string& package,
     for(ParamDeclList::const_iterator pli = optional.begin(); pli != optional.end(); ++pli)
     {
         writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalInParam, optionalMapping,
-                                  (*pli)->tag(), fixKwd((*pli)->name()), true, iter, (*pli)->getMetaData());
+                                  (*pli)->tag(), "iceP_" + (*pli)->name(), true, iter, "", (*pli)->getMetaData());
     }
 
     if(op->sendsClasses(false))
     {
-        out << nl << "__os.writePendingValues();";
+        out << nl << "ostr.writePendingValues();";
     }
 }
 
@@ -692,16 +706,16 @@ Slice::JavaVisitor::writeUnmarshalProxyResults(Output& out, const string& packag
 {
     const ParamDeclList outParams = op->outParameters();
     const TypePtr ret = op->returnType();
-    const string name = "__ret";
+    const string name = "ret";
 
     if(op->returnsMultipleValues())
     {
         string resultType = getResultType(op, package, false, false);
         out << nl << resultType << ' ' << name << " = new " << resultType << "();";
-        out << nl << name << ".read(__is);";
+        out << nl << name << ".read(istr);";
         if(op->returnsClasses(false))
         {
-            out << nl << "__is.readPendingValues();";
+            out << nl << "istr.readPendingValues();";
         }
         out << nl << "return " << name << ';';
     }
@@ -744,7 +758,7 @@ Slice::JavaVisitor::writeUnmarshalProxyResults(Output& out, const string& packag
                 out << nl << resultType << ' ' << name << ';';
             }
             writeMarshalUnmarshalCode(out, package, type, ret ? OptionalReturnParam : OptionalOutParam, true,
-                                      tag, name, false, iter, metaData, name);
+                                      tag, name, false, iter, "", metaData, name);
         }
         else
         {
@@ -760,12 +774,12 @@ Slice::JavaVisitor::writeUnmarshalProxyResults(Output& out, const string& packag
             {
                 out << nl << resultType << ' ' << name << ';';
             }
-            writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, name, false, iter, metaData, name);
+            writeMarshalUnmarshalCode(out, package, type, OptionalNone, false, 0, name, false, iter, "", metaData, name);
         }
 
         if(op->returnsClasses(false))
         {
-            out << nl << "__is.readPendingValues();";
+            out << nl << "istr.readPendingValues();";
         }
 
         if(optional && val)
@@ -789,7 +803,7 @@ Slice::JavaVisitor::writeMarshalServantResults(Output& out, const string& packag
 {
     if(op->returnsMultipleValues())
     {
-        out << nl << param << ".write(__os);";
+        out << nl << param << ".write(ostr);";
     }
     else
     {
@@ -818,12 +832,12 @@ Slice::JavaVisitor::writeMarshalServantResults(Output& out, const string& packag
         }
 
         int iter = 0;
-        writeMarshalUnmarshalCode(out, package, type, mode, true, tag, param, true, iter, metaData);
+        writeMarshalUnmarshalCode(out, package, type, mode, true, tag, param, true, iter, "", metaData);
     }
 
     if(op->returnsClasses(false))
     {
-        out << nl << "__os.writePendingValues();";
+        out << nl << "ostr.writePendingValues();";
     }
 }
 
@@ -852,26 +866,34 @@ Slice::JavaVisitor::writeThrowsClause(const string& package, const ExceptionList
 }
 
 void
-Slice::JavaVisitor::writeMarshalDataMember(Output& out, const string& package, const DataMemberPtr& member, int& iter)
+Slice::JavaVisitor::writeMarshalDataMember(Output& out, const string& package, const DataMemberPtr& member, int& iter, bool forStruct)
 {
-    if(!member->optional())
-    {
-        writeMarshalUnmarshalCode(out, package, member->type(), OptionalNone, false, 0, fixKwd(member->name()),
-                                  true, iter, member->getMetaData());
-    }
-    else
+    if(member->optional())
     {
-        out << nl << "if(__has_" << member->name() << " && __os.writeOptional(" << member->tag() << ", "
+        assert(!forStruct);
+        out << nl << "if(_" << member->name() << " && ostr_.writeOptional(" << member->tag() << ", "
             << getOptionalFormat(member->type()) << "))";
         out << sb;
         writeMarshalUnmarshalCode(out, package, member->type(), OptionalMember, false, 0, fixKwd(member->name()), true,
-                                  iter, member->getMetaData());
+                                  iter, "ostr_", member->getMetaData());
         out << eb;
     }
+    else
+    {
+        string stream = forStruct ? "" : "ostr_";
+        string memberName = fixKwd(member->name());
+        if(forStruct)
+        {
+            memberName = "this." + memberName;
+        }
+
+        writeMarshalUnmarshalCode(out, package, member->type(), OptionalNone, false, 0, memberName,
+                                  true, iter, stream, member->getMetaData());
+    }
 }
 
 void
-Slice::JavaVisitor::writeUnmarshalDataMember(Output& out, const string& package, const DataMemberPtr& member, int& iter)
+Slice::JavaVisitor::writeUnmarshalDataMember(Output& out, const string& package, const DataMemberPtr& member, int& iter, bool forStruct)
 {
     // TBD: Handle passing interface-by-value
 
@@ -879,17 +901,25 @@ Slice::JavaVisitor::writeUnmarshalDataMember(Output& out, const string& package,
 
     if(member->optional())
     {
-        out << nl << "if(__has_" << member->name() << " = __is.readOptional(" << member->tag() << ", "
+        assert(!forStruct);
+        out << nl << "if(_" << member->name() << " = istr_.readOptional(" << member->tag() << ", "
             << getOptionalFormat(member->type()) << "))";
         out << sb;
         writeMarshalUnmarshalCode(out, package, member->type(), OptionalMember, false, 0, fixKwd(member->name()), false,
-                                  iter, member->getMetaData(), patchParams);
+                                  iter, "istr_", member->getMetaData(), patchParams);
         out << eb;
     }
     else
     {
-        writeMarshalUnmarshalCode(out, package, member->type(), OptionalNone, false, 0, fixKwd(member->name()), false,
-                                  iter, member->getMetaData(), patchParams);
+        string stream = forStruct ? "" : "istr_";
+        string memberName = fixKwd(member->name());
+        if(forStruct)
+        {
+            memberName = "this." + memberName;
+        }
+
+        writeMarshalUnmarshalCode(out, package, member->type(), OptionalNone, false, 0, memberName, false,
+                                  iter, stream, member->getMetaData(), patchParams);
     }
 }
 
@@ -922,6 +952,7 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
         }
 
         vector<string> params = getParams(op, package);
+        const string currentParam = "com.zeroc.Ice.Current " + getEscapedParamName(op, "current");
 
         const bool amd = p->hasMetaData("amd") || op->hasMetaData("amd");
 
@@ -939,14 +970,14 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
         if(amd)
         {
             out << nl << "java.util.concurrent.CompletionStage<" << getResultType(op, package, true, true) << "> "
-                << op->name() << "Async" << spar << params << "com.zeroc.Ice.Current __current" << epar;
+                << op->name() << "Async" << spar << params << currentParam << epar;
             writeThrowsClause(package, throws);
             out << ';';
         }
         else
         {
             out << nl << getResultType(op, package, false, true) << ' ' << fixKwd(op->name()) << spar << params
-                << "com.zeroc.Ice.Current __current" << epar;
+                << currentParam << epar;
             writeThrowsClause(package, throws);
             out << ';';
         }
@@ -966,7 +997,7 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
     assert(scopedIter != ids.end());
 #endif
 
-    out << sp << nl << "static final String[] __ids =";
+    out << sp << nl << "static final String[] _iceIds =";
     out << sb;
 
     for(StringList::const_iterator q = ids.begin(); q != ids.end();)
@@ -979,12 +1010,12 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
     }
     out << eb << ';';
 
-    out << sp << nl << "@Override" << nl << "default String[] ice_ids(com.zeroc.Ice.Current __current)";
+    out << sp << nl << "@Override" << nl << "default String[] ice_ids(com.zeroc.Ice.Current current)";
     out << sb;
-    out << nl << "return __ids;";
+    out << nl << "return _iceIds;";
     out << eb;
 
-    out << sp << nl << "@Override" << nl << "default String ice_id(com.zeroc.Ice.Current __current)";
+    out << sp << nl << "@Override" << nl << "default String ice_id(com.zeroc.Ice.Current current)";
     out << sb;
     out << nl << "return ice_staticId();";
     out << eb;
@@ -994,11 +1025,11 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
     out << sb;
     if(p->isInterface())
     {
-        out << nl << "return ice_staticId;";
+        out << nl << "return \"" << p->scoped() << "\";";
     }
     else
     {
-        out << nl << "return " << fixKwd(p->name()) << ".ice_staticId;";
+        out << nl << "return " << fixKwd(p->name()) << ".ice_staticId();";
     }
     out << eb;
 
@@ -1020,7 +1051,7 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
         {
             out << nl << "@Deprecated";
         }
-        out << nl << "static java.util.concurrent.CompletionStage<com.zeroc.Ice.OutputStream> ___" << opName << '(';
+        out << nl << "static java.util.concurrent.CompletionStage<com.zeroc.Ice.OutputStream> _iceD_" << opName << '(';
         if(p->isInterface())
         {
             out << name;
@@ -1029,7 +1060,7 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
         {
             out << '_' << p->name() << "Disp";
         }
-        out << " __obj, final com.zeroc.IceInternal.Incoming __inS, com.zeroc.Ice.Current __current)";
+        out << " obj, final com.zeroc.IceInternal.Incoming inS, com.zeroc.Ice.Current current)";
         if(!op->throws().empty())
         {
             out.inc();
@@ -1045,7 +1076,7 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
         const ParamDeclList inParams = op->inParameters();
         const ParamDeclList outParams = op->outParameters();
 
-        out << nl << "com.zeroc.Ice.Object.__checkMode(" << sliceModeToIceMode(op->mode()) << ", __current.mode);";
+        out << nl << "com.zeroc.Ice.Object._iceCheckMode(" << sliceModeToIceMode(op->mode()) << ", current.mode);";
 
         if(!inParams.empty())
         {
@@ -1054,18 +1085,18 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
             //
             // Declare 'in' parameters.
             //
-            out << nl << "com.zeroc.Ice.InputStream __is = __inS.startReadParams();";
+            out << nl << "com.zeroc.Ice.InputStream istr = inS.startReadParams();";
             for(ParamDeclList::const_iterator pli = inParams.begin(); pli != inParams.end(); ++pli)
             {
                 const TypePtr paramType = (*pli)->type();
                 if(isValue(paramType))
                 {
-                    allocatePatcher(out, paramType, package, "__" + (*pli)->name());
+                    allocatePatcher(out, paramType, package, "icePP_" + (*pli)->name());
                     values.push_back(*pli);
                 }
                 else
                 {
-                    const string paramName = fixKwd((*pli)->name());
+                    const string paramName = "iceP_" + (*pli)->name();
                     const string typeS = typeToString(paramType, TypeModeIn, package, (*pli)->getMetaData(), true,
                                                       (*pli)->optional());
                     if((*pli)->optional())
@@ -1094,66 +1125,66 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
             int iter = 0;
             for(ParamDeclList::const_iterator pli = required.begin(); pli != required.end(); ++pli)
             {
-                const string paramName = isValue((*pli)->type()) ? ("__" + (*pli)->name()) : fixKwd((*pli)->name());
+                const string paramName = isValue((*pli)->type()) ? ("icePP_" + (*pli)->name()) : "iceP_" + (*pli)->name();
                 writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalNone, false, 0, paramName, false,
-                                          iter, (*pli)->getMetaData(), paramName);
+                                          iter, "", (*pli)->getMetaData(), paramName);
             }
             for(ParamDeclList::const_iterator pli = optional.begin(); pli != optional.end(); ++pli)
             {
-                const string paramName = isValue((*pli)->type()) ? ("__" + (*pli)->name()) : fixKwd((*pli)->name());
+                const string paramName = isValue((*pli)->type()) ? ("icePP_" + (*pli)->name()) : "iceP_" + (*pli)->name();
                 writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalInParam, true, (*pli)->tag(),
-                                          paramName, false, iter, (*pli)->getMetaData(), paramName);
+                                          paramName, false, iter, "", (*pli)->getMetaData(), paramName);
             }
             if(op->sendsClasses(false))
             {
-                out << nl << "__is.readPendingValues();";
+                out << nl << "istr.readPendingValues();";
             }
-            out << nl << "__inS.endReadParams();";
+            out << nl << "inS.endReadParams();";
 
             for(ParamDeclList::const_iterator pli = values.begin(); pli != values.end(); ++pli)
             {
                 const TypePtr paramType = (*pli)->type();
-                const string paramName = fixKwd((*pli)->name());
+                const string paramName = "iceP_" + (*pli)->name();
                 const string typeS = typeToString(paramType, TypeModeIn, package, (*pli)->getMetaData(), true,
                                                   (*pli)->optional());
                 if((*pli)->optional())
                 {
-                    out << nl << typeS << ' ' << paramName << " = java.util.Optional.ofNullable(__" << (*pli)->name()
+                    out << nl << typeS << ' ' << paramName << " = java.util.Optional.ofNullable(icePP_" << (*pli)->name()
                         << ".value);";
                 }
                 else
                 {
-                    out << nl << typeS << ' ' << paramName << " = __" << (*pli)->name() << ".value;";
+                    out << nl << typeS << ' ' << paramName << " = icePP_" << (*pli)->name() << ".value;";
                 }
             }
         }
         else
         {
-            out << nl << "__inS.readEmptyParams();";
+            out << nl << "inS.readEmptyParams();";
         }
 
         if(op->format() != DefaultFormat)
         {
-            out << nl << "__inS.setFormat(" << opFormatTypeToString(op) << ");";
+            out << nl << "inS.setFormat(" << opFormatTypeToString(op) << ");";
         }
 
         if(amd)
         {
             if(op->hasMarshaledResult())
             {
-                out << nl << "return __inS.setMarshaledResultFuture(__obj." << opName << "Async" << spar
-                    << getInArgs(op) << "__current" << epar << ");";
+                out << nl << "return inS.setMarshaledResultFuture(obj." << opName << "Async" << spar
+                    << getInArgs(op, true) << "current" << epar << ");";
             }
             else
             {
-                out << nl << "return __inS.setResultFuture(__obj." << opName << "Async" << spar << getInArgs(op)
-                    << "__current" << epar;
+                out << nl << "return inS.setResultFuture(obj." << opName << "Async" << spar << getInArgs(op, true)
+                    << "current" << epar;
                 if(ret || !outParams.empty())
                 {
-                    out << ", (__os, __ret) ->";
+                    out << ", (ostr, ret) ->";
                     out.inc();
                     out << sb;
-                    writeMarshalServantResults(out, package, op, "__ret");
+                    writeMarshalServantResults(out, package, op, "ret");
                     out << eb;
                     out.dec();
                 }
@@ -1168,27 +1199,27 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
             out << nl;
             if(ret || !outParams.empty())
             {
-                out << getResultType(op, package, false, true) << " __ret = ";
+                out << getResultType(op, package, false, true) << " ret = ";
             }
-            out << "__obj." << fixKwd(opName) << spar << getInArgs(op) << "__current" << epar << ';';
+            out << "obj." << fixKwd(opName) << spar << getInArgs(op, true) << "current" << epar << ';';
 
             //
             // Marshal 'out' parameters and return value.
             //
             if(op->hasMarshaledResult())
             {
-                out << nl << "return __inS.setMarshaledResult(__ret);";
+                out << nl << "return inS.setMarshaledResult(ret);";
             }
             else if(ret || !outParams.empty())
             {
-                out << nl << "com.zeroc.Ice.OutputStream __os = __inS.startWriteParams();";
-                writeMarshalServantResults(out, package, op, "__ret");
-                out << nl << "__inS.endWriteParams(__os);";
-                out << nl << "return __inS.setResult(__os);";
+                out << nl << "com.zeroc.Ice.OutputStream ostr = inS.startWriteParams();";
+                writeMarshalServantResults(out, package, op, "ret");
+                out << nl << "inS.endWriteParams(ostr);";
+                out << nl << "return inS.setResult(ostr);";
             }
             else
             {
-                out << nl << "return __inS.setResult(__inS.writeEmptyParams());";
+                out << nl << "return inS.setResult(inS.writeEmptyParams());";
             }
         }
 
@@ -1207,7 +1238,7 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
         allOpNames.sort();
         allOpNames.unique();
 
-        out << sp << nl << "final static String[] __ops =";
+        out << sp << nl << "final static String[] _iceOps =";
         out << sb;
         for(StringList::const_iterator q = allOpNames.begin(); q != allOpNames.end();)
         {
@@ -1236,17 +1267,17 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
             }
         }
         out << nl << "@Override" << nl
-            << "default java.util.concurrent.CompletionStage<com.zeroc.Ice.OutputStream> __dispatch("
-            << "com.zeroc.IceInternal.Incoming in, com.zeroc.Ice.Current __current)";
+            << "default java.util.concurrent.CompletionStage<com.zeroc.Ice.OutputStream> _iceDispatch("
+            << "com.zeroc.IceInternal.Incoming in, com.zeroc.Ice.Current current)";
         out.inc();
         out << nl << "throws com.zeroc.Ice.UserException";
         out.dec();
         out << sb;
-        out << nl << "int pos = java.util.Arrays.binarySearch(__ops, __current.operation);";
+        out << nl << "int pos = java.util.Arrays.binarySearch(_iceOps, current.operation);";
         out << nl << "if(pos < 0)";
         out << sb;
         out << nl << "throw new "
-            << "com.zeroc.Ice.OperationNotExistException(__current.id, __current.facet, __current.operation);";
+            << "com.zeroc.Ice.OperationNotExistException(current.id, current.facet, current.operation);";
         out << eb;
         out << sp << nl << "switch(pos)";
         out << sb;
@@ -1259,19 +1290,19 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
             out << sb;
             if(opName == "ice_id")
             {
-                out << nl << "return com.zeroc.Ice.Object.___ice_id(this, in, __current);";
+                out << nl << "return com.zeroc.Ice.Object._iceD_ice_id(this, in, current);";
             }
             else if(opName == "ice_ids")
             {
-                out << nl << "return com.zeroc.Ice.Object.___ice_ids(this, in, __current);";
+                out << nl << "return com.zeroc.Ice.Object._iceD_ice_ids(this, in, current);";
             }
             else if(opName == "ice_isA")
             {
-                out << nl << "return com.zeroc.Ice.Object.___ice_isA(this, in, __current);";
+                out << nl << "return com.zeroc.Ice.Object._iceD_ice_isA(this, in, current);";
             }
             else if(opName == "ice_ping")
             {
-                out << nl << "return com.zeroc.Ice.Object.___ice_ping(this, in, __current);";
+                out << nl << "return com.zeroc.Ice.Object._iceD_ice_ping(this, in, current);";
             }
             else
             {
@@ -1287,7 +1318,7 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
                         assert(cl);
                         if(cl->scoped() == p->scoped())
                         {
-                            out << nl << "return ___" << opName << "(this, in, __current);";
+                            out << nl << "return _iceD_" << opName << "(this, in, current);";
                         }
                         else
                         {
@@ -1300,7 +1331,7 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
                             {
                                 base = getAbsolute(cl, package, "_", "Disp");
                             }
-                            out << nl << "return " << base << ".___" << opName << "(this, in, __current);";
+                            out << nl << "return " << base << "._iceD_" << opName << "(this, in, current);";
                         }
                         break;
                     }
@@ -1311,7 +1342,7 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
         out << eb;
         out << sp << nl << "assert(false);";
         out << nl << "throw new "
-            << "com.zeroc.Ice.OperationNotExistException(__current.id, __current.facet, __current.operation);";
+            << "com.zeroc.Ice.OperationNotExistException(current.id, current.facet, current.operation);";
         out << eb;
 
         //
@@ -1330,7 +1361,7 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
 
         if(!attributesMap.empty())
         {
-            out << sp << nl << "final static int[] __operationAttributes =";
+            out << sp << nl << "final static int[] _iceOperationAttributes =";
             out << sb;
             for(StringList::const_iterator q = allOpNames.begin(); q != allOpNames.end();)
             {
@@ -1352,12 +1383,12 @@ Slice::JavaVisitor::writeDispatch(Output& out, const ClassDefPtr& p)
 
             out << sp << nl << "@Override" << nl << "default int ice_operationAttributes(String operation)";
             out << sb;
-            out << nl << "int pos = java.util.Arrays.binarySearch(__ops, operation);";
+            out << nl << "int pos = java.util.Arrays.binarySearch(_iceOps, operation);";
             out << nl << "if(pos < 0)";
             out << sb;
             out << nl << "return -1;";
             out << eb;
-            out << sp << nl << "return __operationAttributes[pos];";
+            out << sp << nl << "return _iceOperationAttributes[pos];";
             out << eb;
         }
     }
@@ -1386,28 +1417,28 @@ Slice::JavaVisitor::writeMarshaling(Output& out, const ClassDefPtr& p)
     {
         out << sp;
         out << nl << "@Override";
-        out << nl << "public void __write(com.zeroc.Ice.OutputStream __os)";
+        out << nl << "public void _iceWrite(com.zeroc.Ice.OutputStream ostr)";
         out << sb;
-        out << nl << "__os.startValue(__slicedData);";
-        out << nl << "__writeImpl(__os);";
-        out << nl << "__os.endValue();";
+        out << nl << "ostr.startValue(_iceSlicedData);";
+        out << nl << "_iceWriteImpl(ostr);";
+        out << nl << "ostr.endValue();";
         out << eb;
 
         out << sp;
         out << nl << "@Override";
-        out << nl << "public void __read(com.zeroc.Ice.InputStream __is)";
+        out << nl << "public void _iceRead(com.zeroc.Ice.InputStream istr)";
         out << sb;
-        out << nl << "__is.startValue();";
-        out << nl << "__readImpl(__is);";
-        out << nl << "__slicedData = __is.endValue(true);";
+        out << nl << "istr.startValue();";
+        out << nl << "_iceReadImpl(istr);";
+        out << nl << "_iceSlicedData = istr.endValue(true);";
         out << eb;
     }
 
     out << sp;
     out << nl << "@Override";
-    out << nl << "protected void __writeImpl(com.zeroc.Ice.OutputStream __os)";
+    out << nl << "protected void _iceWriteImpl(com.zeroc.Ice.OutputStream ostr_)";
     out << sb;
-    out << nl << "__os.startSlice(ice_staticId, " << p->compactId() << (!base ? ", true" : ", false") << ");";
+    out << nl << "ostr_.startSlice(ice_staticId(), " << p->compactId() << (!base ? ", true" : ", false") << ");";
     iter = 0;
     for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
     {
@@ -1420,10 +1451,10 @@ Slice::JavaVisitor::writeMarshaling(Output& out, const ClassDefPtr& p)
     {
         writeMarshalDataMember(out, package, *d, iter);
     }
-    out << nl << "__os.endSlice();";
+    out << nl << "ostr_.endSlice();";
     if(base)
     {
-        out << nl << "super.__writeImpl(__os);";
+        out << nl << "super._iceWriteImpl(ostr_);";
     }
     out << eb;
 
@@ -1432,9 +1463,9 @@ Slice::JavaVisitor::writeMarshaling(Output& out, const ClassDefPtr& p)
 
     out << sp;
     out << nl << "@Override";
-    out << nl << "protected void __readImpl(com.zeroc.Ice.InputStream __is)";
+    out << nl << "protected void _iceReadImpl(com.zeroc.Ice.InputStream istr_)";
     out << sb;
-    out << nl << "__is.startSlice();";
+    out << nl << "istr_.startSlice();";
 
     iter = 0;
     for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
@@ -1449,16 +1480,16 @@ Slice::JavaVisitor::writeMarshaling(Output& out, const ClassDefPtr& p)
         writeUnmarshalDataMember(out, package, *d, iter);
     }
 
-    out << nl << "__is.endSlice();";
+    out << nl << "istr_.endSlice();";
     if(base)
     {
-        out << nl << "super.__readImpl(__is);";
+        out << nl << "super._iceReadImpl(istr_);";
     }
     out << eb;
 
     if(preserved && !basePreserved)
     {
-        out << sp << nl << "protected com.zeroc.Ice.SlicedData __slicedData;";
+        out << sp << nl << "protected com.zeroc.Ice.SlicedData _iceSlicedData;";
     }
 }
 
@@ -1875,7 +1906,7 @@ Slice::JavaVisitor::writeProxyDocComment(Output& out, const OperationPtr& p, con
         return;
     }
 
-    const string contextParam = " * @param __ctx The Context map to send with the invocation.";
+    const string contextParam = " * @param context The Context map to send with the invocation.";
 
     out << nl << "/**";
     if(!dc->overview.empty())
@@ -1989,7 +2020,9 @@ Slice::JavaVisitor::writeServantDocComment(Output& out, const OperationPtr& p, c
         return;
     }
 
-    const string currentParam = " * @param __current The Current object for the invocation.";
+    const ParamDeclList paramList = p->inParameters();
+    const string currentParamName = getEscapedParamName(p, "current");
+    const string currentParam = " * @param " + currentParamName + " The Current object for the invocation.";
 
     out << nl << "/**";
     if(!dc->overview.empty())
@@ -2001,7 +2034,6 @@ Slice::JavaVisitor::writeServantDocComment(Output& out, const OperationPtr& p, c
     //
     // Show in-params in order of declaration, but only those with docs.
     //
-    const ParamDeclList paramList = p->inParameters();
     for(ParamDeclList::const_iterator i = paramList.begin(); i != paramList.end(); ++i)
     {
         const string name = (*i)->name();
@@ -2493,24 +2525,17 @@ Slice::Gen::TypesVisitor::visitClassDefEnd(const ClassDefPtr& p)
 
     if(!p->isLocal())
     {
-        out << sp << nl;
-        if(!p->isInterface())
-        {
-            out << "public ";
-        }
-        out << "static final String ice_staticId = \"" << p->scoped() << "\";";
-
         if(!p->isInterface())
         {
             out << sp << nl << "public static String ice_staticId()";
             out << sb;
-            out << nl << "return ice_staticId;";
+            out << nl << "return \"" << p->scoped() << "\";";
             out << eb;
 
             out << sp << nl << "@Override";
             out << nl << "public String ice_id()";
             out << sb;
-            out << nl << "return ice_staticId;";
+            out << nl << "return ice_staticId();";
             out << eb;
         }
     }
@@ -2715,9 +2740,9 @@ Slice::Gen::TypesVisitor::visitExceptionStart(const ExceptionPtr& p)
     out << eb;
 
     out << sp;
-    out << nl << "public " << name << "(Throwable __cause)";
+    out << nl << "public " << name << "(Throwable cause)";
     out << sb;
-    out << nl << "super(__cause);";
+    out << nl << "super(cause);";
     writeDataMemberInitializers(out, members, package);
     out << eb;
 
@@ -2812,7 +2837,7 @@ Slice::Gen::TypesVisitor::visitExceptionStart(const ExceptionPtr& p)
                 //
                 if(allDataMembers.size() < 254)
                 {
-                    paramDecl.push_back("Throwable __cause");
+                    paramDecl.push_back("Throwable cause");
                     out << sp << nl << "public " << name << spar;
                     out << paramDecl << epar;
                     out << sb;
@@ -2827,12 +2852,12 @@ Slice::Gen::TypesVisitor::visitExceptionStart(const ExceptionPtr& p)
                                 baseParamNames.push_back(fixKwd((*d)->name()));
                             }
                         }
-                        baseParamNames.push_back("__cause");
+                        baseParamNames.push_back("cause");
                         out << baseParamNames << epar << ';';
                     }
                     else
                     {
-                        out << nl << "super(__cause);";
+                        out << nl << "super(cause);";
                     }
                     for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
                     {
@@ -2891,13 +2916,13 @@ Slice::Gen::TypesVisitor::visitExceptionStart(const ExceptionPtr& p)
             //
             if(allDataMembers.size() < 254)
             {
-                paramDecl.push_back("Throwable __cause");
+                paramDecl.push_back("Throwable cause");
                 out << sp << nl << "public " << name << spar;
                 out << paramDecl << epar;
                 out << sb;
                 if(!base)
                 {
-                    out << nl << "super(__cause);";
+                    out << nl << "super(cause);";
                 }
                 else
                 {
@@ -2908,7 +2933,7 @@ Slice::Gen::TypesVisitor::visitExceptionStart(const ExceptionPtr& p)
                     {
                         baseParamNames.push_back(fixKwd((*d)->name()));
                     }
-                    baseParamNames.push_back("__cause");
+                    baseParamNames.push_back("cause");
                     out << baseParamNames << epar << ';';
                 }
                 for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
@@ -2960,28 +2985,28 @@ Slice::Gen::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
         {
             out << sp;
             out << nl << "@Override";
-            out << nl << "public void __write(com.zeroc.Ice.OutputStream __os)";
+            out << nl << "public void _write(com.zeroc.Ice.OutputStream ostr)";
             out << sb;
-            out << nl << "__os.startException(__slicedData);";
-            out << nl << "__writeImpl(__os);";
-            out << nl << "__os.endException();";
+            out << nl << "ostr.startException(_slicedData);";
+            out << nl << "_writeImpl(ostr);";
+            out << nl << "ostr.endException();";
             out << eb;
 
             out << sp;
             out << nl << "@Override";
-            out << nl << "public void __read(com.zeroc.Ice.InputStream __is)";
+            out << nl << "public void _read(com.zeroc.Ice.InputStream istr)";
             out << sb;
-            out << nl << "__is.startException();";
-            out << nl << "__readImpl(__is);";
-            out << nl << "__slicedData = __is.endException(true);";
+            out << nl << "istr.startException();";
+            out << nl << "_readImpl(istr);";
+            out << nl << "_slicedData = istr.endException(true);";
             out << eb;
         }
 
         out << sp;
         out << nl << "@Override";
-        out << nl << "protected void __writeImpl(com.zeroc.Ice.OutputStream __os)";
+        out << nl << "protected void _writeImpl(com.zeroc.Ice.OutputStream ostr_)";
         out << sb;
-        out << nl << "__os.startSlice(\"" << scoped << "\", -1, " << (!base ? "true" : "false") << ");";
+        out << nl << "ostr_.startSlice(\"" << scoped << "\", -1, " << (!base ? "true" : "false") << ");";
         iter = 0;
         for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
         {
@@ -2994,10 +3019,10 @@ Slice::Gen::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
         {
             writeMarshalDataMember(out, package, *d, iter);
         }
-        out << nl << "__os.endSlice();";
+        out << nl << "ostr_.endSlice();";
         if(base)
         {
-            out << nl << "super.__writeImpl(__os);";
+            out << nl << "super._writeImpl(ostr_);";
         }
         out << eb;
 
@@ -3006,9 +3031,9 @@ Slice::Gen::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
 
         out << sp;
         out << nl << "@Override";
-        out << nl << "protected void __readImpl(com.zeroc.Ice.InputStream __is)";
+        out << nl << "protected void _readImpl(com.zeroc.Ice.InputStream istr_)";
         out << sb;
-        out << nl << "__is.startSlice();";
+        out << nl << "istr_.startSlice();";
         iter = 0;
         for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
         {
@@ -3021,10 +3046,10 @@ Slice::Gen::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
         {
             writeUnmarshalDataMember(out, package, *d, iter);
         }
-        out << nl << "__is.endSlice();";
+        out << nl << "istr_.endSlice();";
         if(base)
         {
-            out << nl << "super.__readImpl(__is);";
+            out << nl << "super._readImpl(istr_);";
         }
         out << eb;
 
@@ -3034,7 +3059,7 @@ Slice::Gen::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
             {
                 out << sp;
                 out << nl << "@Override";
-                out << nl << "public boolean __usesClasses()";
+                out << nl << "public boolean _usesClasses()";
                 out << sb;
                 out << nl << "return true;";
                 out << eb;
@@ -3043,7 +3068,7 @@ Slice::Gen::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
 
         if(preserved && !basePreserved)
         {
-            out << sp << nl << "protected com.zeroc.Ice.SlicedData __slicedData;";
+            out << sp << nl << "protected com.zeroc.Ice.SlicedData _slicedData;";
         }
     }
 
@@ -3165,12 +3190,12 @@ Slice::Gen::TypesVisitor::visitStructEnd(const StructPtr& p)
     out << sb;
     out << nl << "return true;";
     out << eb;
-    out << nl << typeS << " _r = null;";
+    out << nl << typeS << " r = null;";
     out << nl << "if(rhs instanceof " << typeS << ")";
     out << sb;
-    out << nl << "_r = (" << typeS << ")rhs;";
+    out << nl << "r = (" << typeS << ")rhs;";
     out << eb;
-    out << sp << nl << "if(_r != null)";
+    out << sp << nl << "if(r != null)";
     out << sb;
     for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
     {
@@ -3188,7 +3213,7 @@ Slice::Gen::TypesVisitor::visitStructEnd(const StructPtr& p)
                 case Builtin::KindFloat:
                 case Builtin::KindDouble:
                 {
-                    out << nl << "if(" << memberName << " != _r." << memberName << ')';
+                    out << nl << "if(this." << memberName << " != r." << memberName << ')';
                     out << sb;
                     out << nl << "return false;";
                     out << eb;
@@ -3201,10 +3226,10 @@ Slice::Gen::TypesVisitor::visitStructEnd(const StructPtr& p)
                 case Builtin::KindLocalObject:
                 case Builtin::KindValue:
                 {
-                    out << nl << "if(" << memberName << " != _r." << memberName << ')';
+                    out << nl << "if(this." << memberName << " != r." << memberName << ')';
                     out << sb;
-                    out << nl << "if(" << memberName << " == null || _r." << memberName << " == null || !"
-                        << memberName << ".equals(_r." << memberName << "))";
+                    out << nl << "if(this." << memberName << " == null || r." << memberName << " == null || !this."
+                        << memberName << ".equals(r." << memberName << "))";
                     out << sb;
                     out << nl << "return false;";
                     out << eb;
@@ -3228,10 +3253,10 @@ Slice::Gen::TypesVisitor::visitStructEnd(const StructPtr& p)
             {
                 if(hasTypeMetaData(seq, (*d)->getMetaData()))
                 {
-                    out << nl << "if(" << memberName << " != _r." << memberName << ')';
+                    out << nl << "if(this." << memberName << " != r." << memberName << ')';
                     out << sb;
-                    out << nl << "if(" << memberName << " == null || _r." << memberName << " == null || !"
-                        << memberName << ".equals(_r." << memberName << "))";
+                    out << nl << "if(this." << memberName << " == null || r." << memberName << " == null || !this."
+                        << memberName << ".equals(r." << memberName << "))";
                     out << sb;
                     out << nl << "return false;";
                     out << eb;
@@ -3242,7 +3267,7 @@ Slice::Gen::TypesVisitor::visitStructEnd(const StructPtr& p)
                     //
                     // Arrays.equals() handles null values.
                     //
-                    out << nl << "if(!java.util.Arrays.equals(" << memberName << ", _r." << memberName << "))";
+                    out << nl << "if(!java.util.Arrays.equals(this." << memberName << ", r." << memberName << "))";
                     out << sb;
                     out << nl << "return false;";
                     out << eb;
@@ -3250,10 +3275,10 @@ Slice::Gen::TypesVisitor::visitStructEnd(const StructPtr& p)
             }
             else
             {
-                out << nl << "if(" << memberName << " != _r." << memberName << ')';
+                out << nl << "if(this." << memberName << " != r." << memberName << ')';
                 out << sb;
-                out << nl << "if(" << memberName << " == null || _r." << memberName << " == null || !"
-                    << memberName << ".equals(_r." << memberName << "))";
+                out << nl << "if(this." << memberName << " == null || r." << memberName << " == null || !this."
+                    << memberName << ".equals(r." << memberName << "))";
                 out << sb;
                 out << nl << "return false;";
                 out << eb;
@@ -3268,15 +3293,15 @@ Slice::Gen::TypesVisitor::visitStructEnd(const StructPtr& p)
 
     out << sp << nl << "public int hashCode()";
     out << sb;
-    out << nl << "int __h = 5381;";
-    out << nl << "__h = com.zeroc.IceInternal.HashUtil.hashAdd(__h, \"" << p->scoped() << "\");";
+    out << nl << "int h_ = 5381;";
+    out << nl << "h_ = com.zeroc.IceInternal.HashUtil.hashAdd(h_, \"" << p->scoped() << "\");";
     iter = 0;
     for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
     {
         string memberName = fixKwd((*d)->name());
-        out << nl << "__h = com.zeroc.IceInternal.HashUtil.hashAdd(__h, " << memberName << ");";
+        out << nl << "h_ = com.zeroc.IceInternal.HashUtil.hashAdd(h_, " << memberName << ");";
     }
-    out << nl << "return __h;";
+    out << nl << "return h_;";
     out << eb;
 
     out << sp << nl << "public " << name << " clone()";
@@ -3295,49 +3320,49 @@ Slice::Gen::TypesVisitor::visitStructEnd(const StructPtr& p)
 
     if(!p->isLocal())
     {
-        out << sp << nl << "public void ice_write(com.zeroc.Ice.OutputStream __os)";
+        out << sp << nl << "public void write(com.zeroc.Ice.OutputStream ostr)";
         out << sb;
         iter = 0;
         for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
         {
-            writeMarshalDataMember(out, package, *d, iter);
+            writeMarshalDataMember(out, package, *d, iter, true);
         }
         out << eb;
 
         DataMemberList classMembers = p->classDataMembers();
 
-        out << sp << nl << "public void ice_read(com.zeroc.Ice.InputStream __is)";
+        out << sp << nl << "public void read(com.zeroc.Ice.InputStream istr)";
         out << sb;
         iter = 0;
         for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
         {
-            writeUnmarshalDataMember(out, package, *d, iter);
+            writeUnmarshalDataMember(out, package, *d, iter, true);
         }
         out << eb;
 
-        out << sp << nl << "static public void write(com.zeroc.Ice.OutputStream __os, " << name << " __v)";
+        out << sp << nl << "static public void write(com.zeroc.Ice.OutputStream ostr, " << name << " v)";
         out << sb;
-        out << nl << "if(__v == null)";
+        out << nl << "if(v == null)";
         out << sb;
-        out << nl << "__nullMarshalValue.ice_write(__os);";
+        out << nl << "_nullMarshalValue.write(ostr);";
         out << eb;
         out << nl << "else";
         out << sb;
-        out << nl << "__v.ice_write(__os);";
+        out << nl << "v.write(ostr);";
         out << eb;
         out << eb;
 
-        out << sp << nl << "static public " << name << " read(com.zeroc.Ice.InputStream __is, " << name << " __v)";
+        out << sp << nl << "static public " << name << " read(com.zeroc.Ice.InputStream istr, " << name << " v)";
         out << sb;
-        out << nl << "if(__v == null)";
+        out << nl << "if(v == null)";
         out << sb;
-        out << nl << " __v = new " << name << "();";
+        out << nl << " v = new " << name << "();";
         out << eb;
-        out << nl << "__v.ice_read(__is);";
-        out << nl << "return __v;";
+        out << nl << "v.read(istr);";
+        out << nl << "return v;";
         out << eb;
 
-        out << nl << nl << "private static final " << name << " __nullMarshalValue = new " << name << "();";
+        out << nl << nl << "private static final " << name << " _nullMarshalValue = new " << name << "();";
     }
 
     out << sp << nl << "public static final long serialVersionUID = ";
@@ -3444,7 +3469,7 @@ Slice::Gen::TypesVisitor::visitDataMember(const DataMemberPtr& p)
 
     if(optional)
     {
-        out << nl << "private boolean __has_" << p->name() << ';';
+        out << nl << "private boolean _" << p->name() << ';';
     }
 
     //
@@ -3492,7 +3517,7 @@ Slice::Gen::TypesVisitor::visitDataMember(const DataMemberPtr& p)
         out << sb;
         if(optional)
         {
-            out << nl << "if(!__has_" << p->name() << ')';
+            out << nl << "if(!_" << p->name() << ')';
             out << sb;
             out << nl << "throw new java.util.NoSuchElementException(\"" << name << " is not set\");";
             out << eb;
@@ -3509,13 +3534,13 @@ Slice::Gen::TypesVisitor::visitDataMember(const DataMemberPtr& p)
         {
             out << nl << "@Deprecated";
         }
-        out << nl << "public void set" << capName << '(' << s << " _" << name << ')';
+        out << nl << "public void set" << capName << '(' << s << " " << name << ')';
         out << sb;
         if(optional)
         {
-            out << nl << "__has_" << p->name() << " = true;";
+            out << nl << "_" << p->name() << " = true;";
         }
-        out << nl << name << " = _" << name << ';';
+        out << nl << "this." << name << " = " << name << ';';
         out << eb;
 
         //
@@ -3531,7 +3556,7 @@ Slice::Gen::TypesVisitor::visitDataMember(const DataMemberPtr& p)
             }
             out << nl << "public boolean has" << capName << "()";
             out << sb;
-            out << nl << "return __has_" << p->name() << ';';
+            out << nl << "return _" << p->name() << ';';
             out << eb;
 
             out << sp;
@@ -3542,7 +3567,7 @@ Slice::Gen::TypesVisitor::visitDataMember(const DataMemberPtr& p)
             }
             out << nl << "public void clear" << capName << "()";
             out << sb;
-            out << nl << "__has_" << p->name() << " = false;";
+            out << nl << "_" << p->name() << " = false;";
             out << eb;
 
             const string optType =
@@ -3554,30 +3579,30 @@ Slice::Gen::TypesVisitor::visitDataMember(const DataMemberPtr& p)
             {
                 out << nl << "@Deprecated";
             }
-            out << nl << "public void optional" << capName << '(' << optType << " __v)";
+            out << nl << "public void optional" << capName << '(' << optType << " v)";
             out << sb;
-            out << nl << "if(__v == null || !__v.isPresent())";
+            out << nl << "if(v == null || !v.isPresent())";
             out << sb;
-            out << nl << "__has_" << p->name() << " = false;";
+            out << nl << "_" << p->name() << " = false;";
             out << eb;
             out << nl << "else";
             out << sb;
-            out << nl << "__has_" << p->name() << " = true;";
+            out << nl << "_" << p->name() << " = true;";
             if(b && b->kind() == Builtin::KindInt)
             {
-                out << nl << name << " = __v.getAsInt();";
+                out << nl << name << " = v.getAsInt();";
             }
             else if(b && b->kind() == Builtin::KindLong)
             {
-                out << nl << name << " = __v.getAsLong();";
+                out << nl << name << " = v.getAsLong();";
             }
             else if(b && b->kind() == Builtin::KindDouble)
             {
-                out << nl << name << " = __v.getAsDouble();";
+                out << nl << name << " = v.getAsDouble();";
             }
             else
             {
-                out << nl << name << " = __v.get();";
+                out << nl << name << " = v.get();";
             }
             out << eb;
             out << eb;
@@ -3590,7 +3615,7 @@ Slice::Gen::TypesVisitor::visitDataMember(const DataMemberPtr& p)
             }
             out << nl << "public " << optType << " optional" << capName << "()";
             out << sb;
-            out << nl << "if(__has_" << p->name() << ')';
+            out << nl << "if(_" << p->name() << ')';
             out << sb;
             if(classType)
             {
@@ -3653,7 +3678,7 @@ Slice::Gen::TypesVisitor::visitDataMember(const DataMemberPtr& p)
             out << sb;
             if(optional)
             {
-                out << nl << "if(!__has_" << p->name() << ')';
+                out << nl << "if(!_" << p->name() << ')';
                 out << sb;
                 out << nl << "throw new java.util.NoSuchElementException(\"" << name << " is not set\");";
                 out << eb;
@@ -3688,16 +3713,16 @@ Slice::Gen::TypesVisitor::visitDataMember(const DataMemberPtr& p)
                 {
                     out << nl << "@Deprecated";
                 }
-                out << nl << "public " << elem << " get" << capName << "(int _index)";
+                out << nl << "public " << elem << " get" << capName << "(int index)";
                 out << sb;
                 if(optional)
                 {
-                    out << nl << "if(!__has_" << p->name() << ')';
+                    out << nl << "if(!_" << p->name() << ')';
                     out << sb;
                     out << nl << "throw new java.util.NoSuchElementException(\"" << name << " is not set\");";
                     out << eb;
                 }
-                out << nl << "return " << name << "[_index];";
+                out << nl << "return this." << name << "[index];";
                 out << eb;
 
                 //
@@ -3708,16 +3733,16 @@ Slice::Gen::TypesVisitor::visitDataMember(const DataMemberPtr& p)
                 {
                     out << nl << "@Deprecated";
                 }
-                out << nl << "public void set" << capName << "(int _index, " << elem << " _val)";
+                out << nl << "public void set" << capName << "(int index, " << elem << " val)";
                 out << sb;
                 if(optional)
                 {
-                    out << nl << "if(!__has_" << p->name() << ')';
+                    out << nl << "if(!_" << p->name() << ')';
                     out << sb;
                     out << nl << "throw new java.util.NoSuchElementException(\"" << name << " is not set\");";
                     out << eb;
                 }
-                out << nl << name << "[_index] = _val;";
+                out << nl << "this." << name << "[index] = val;";
                 out << eb;
             }
         }
@@ -3769,12 +3794,12 @@ Slice::Gen::TypesVisitor::visitEnum(const EnumPtr& p)
 
     out << sp << nl << "public int value()";
     out << sb;
-    out << nl << "return __value;";
+    out << nl << "return _value;";
     out << eb;
 
-    out << sp << nl << "public static " << name << " valueOf(int __v)";
+    out << sp << nl << "public static " << name << " valueOf(int v)";
     out << sb;
-    out << nl << "switch(__v)";
+    out << nl << "switch(v)";
     out << sb;
     out.dec();
     for(EnumeratorList::const_iterator en = enumerators.begin(); en != enumerators.end(); ++en)
@@ -3789,50 +3814,49 @@ Slice::Gen::TypesVisitor::visitEnum(const EnumPtr& p)
     out << nl << "return null;";
     out << eb;
 
-    out << sp << nl << "private"
-        << nl << name << "(int __v)";
+    out << sp << nl << "private " << name << "(int v)";
     out << sb;
-    out << nl << "__value = __v;";
+    out << nl << "_value = v;";
     out << eb;
 
     if(!p->isLocal())
     {
-        out << sp << nl << "public void" << nl << "ice_write(com.zeroc.Ice.OutputStream __os)";
+        out << sp << nl << "public void write(com.zeroc.Ice.OutputStream ostr)";
         out << sb;
-        out << nl << "__os.writeEnum(value(), " << p->maxValue() << ");";
+        out << nl << "ostr.writeEnum(_value, " << p->maxValue() << ");";
         out << eb;
 
-        out << sp << nl << "public static void write(com.zeroc.Ice.OutputStream __os, " << name << " __v)";
+        out << sp << nl << "public static void write(com.zeroc.Ice.OutputStream ostr, " << name << " v)";
         out << sb;
-        out << nl << "if(__v == null)";
+        out << nl << "if(v == null)";
         out << sb;
         string firstEnum = fixKwd(enumerators.front()->name());
-        out << nl << "__os.writeEnum(" << absolute << '.' << firstEnum << ".value(), " << p->maxValue() << ");";
+        out << nl << "ostr.writeEnum(" << absolute << '.' << firstEnum << ".value(), " << p->maxValue() << ");";
         out << eb;
         out << nl << "else";
         out << sb;
-        out << nl << "__os.writeEnum(__v.value(), " << p->maxValue() << ");";
+        out << nl << "ostr.writeEnum(v.value(), " << p->maxValue() << ");";
         out << eb;
         out << eb;
 
-        out << sp << nl << "public static " << name << " read(com.zeroc.Ice.InputStream __is)";
+        out << sp << nl << "public static " << name << " read(com.zeroc.Ice.InputStream istr)";
         out << sb;
-        out << nl << "int __v = __is.readEnum(" << p->maxValue() << ");";
-        out << nl << "return __validate(__v);";
+        out << nl << "int v = istr.readEnum(" << p->maxValue() << ");";
+        out << nl << "return validate(v);";
         out << eb;
 
-        out << sp << nl << "private static " << name << " __validate(int __v)";
+        out << sp << nl << "private static " << name << " validate(int v)";
         out << sb;
-        out << nl << "final " << name << " __e = valueOf(__v);";
-        out << nl << "if(__e == null)";
+        out << nl << "final " << name << " e = valueOf(v);";
+        out << nl << "if(e == null)";
         out << sb;
-        out << nl << "throw new com.zeroc.Ice.MarshalException(\"enumerator value \" + __v + \" is out of range\");";
+        out << nl << "throw new com.zeroc.Ice.MarshalException(\"enumerator value \" + v + \" is out of range\");";
         out << eb;
-        out << nl << "return __e;";
+        out << nl << "return e;";
         out << eb;
     }
 
-    out << sp << nl << "private final int __value;";
+    out << sp << nl << "private final int _value;";
 
     out << eb;
     close();
@@ -4014,10 +4038,10 @@ Slice::Gen::HelperVisitor::visitSequence(const SequencePtr& p)
     out << sp << nl << "public final class " << name << "Helper";
     out << sb;
 
-    out << nl << "public static void write(com.zeroc.Ice.OutputStream __os, " << typeS << " __v)";
+    out << nl << "public static void write(com.zeroc.Ice.OutputStream ostr, " << typeS << " v)";
     out << sb;
     iter = 0;
-    writeSequenceMarshalUnmarshalCode(out, package, p, "__v", true, iter, false);
+    writeSequenceMarshalUnmarshalCode(out, package, p, "v", true, iter, false);
     out << eb;
 
     out << sp;
@@ -4025,12 +4049,12 @@ Slice::Gen::HelperVisitor::visitSequence(const SequencePtr& p)
     {
         out << nl << "@SuppressWarnings(\"unchecked\")";
     }
-    out << nl << "public static " << typeS << " read(com.zeroc.Ice.InputStream __is)";
+    out << nl << "public static " << typeS << " read(com.zeroc.Ice.InputStream istr)";
     out << sb;
-    out << nl << typeS << " __v;";
+    out << nl << typeS << " v;";
     iter = 0;
-    writeSequenceMarshalUnmarshalCode(out, package, p, "__v", false, iter, false);
-    out << nl << "return __v;";
+    writeSequenceMarshalUnmarshalCode(out, package, p, "v", false, iter, false);
+    out << nl << "return v;";
     out << eb;
 
     out << eb;
@@ -4066,18 +4090,18 @@ Slice::Gen::HelperVisitor::visitDictionary(const DictionaryPtr& p)
     out << sp << nl << "public final class " << name << "Helper";
     out << sb;
 
-    out << nl << "public static void write(com.zeroc.Ice.OutputStream __os, " << formalType << " __v)";
+    out << nl << "public static void write(com.zeroc.Ice.OutputStream ostr, " << formalType << " v)";
     out << sb;
     iter = 0;
-    writeDictionaryMarshalUnmarshalCode(out, package, p, "__v", true, iter, false);
+    writeDictionaryMarshalUnmarshalCode(out, package, p, "v", true, iter, false);
     out << eb;
 
-    out << sp << nl << "public static " << formalType << " read(com.zeroc.Ice.InputStream __is)";
+    out << sp << nl << "public static " << formalType << " read(com.zeroc.Ice.InputStream istr)";
     out << sb;
-    out << nl << formalType << " __v;";
+    out << nl << formalType << " v;";
     iter = 0;
-    writeDictionaryMarshalUnmarshalCode(out, package, p, "__v", false, iter, false);
-    out << nl << "return __v;";
+    writeDictionaryMarshalUnmarshalCode(out, package, p, "v", false, iter, false);
+    out << nl << "return v;";
     out << eb;
 
     out << eb;
@@ -4165,17 +4189,17 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
 
     DocCommentPtr dc = parseDocComment(p);
 
-    const string contextParam = "java.util.Map<String, String> __ctx";
+    const string contextParam = "java.util.Map<String, String> context";
 
     out << sp;
     writeDocComment(out,
                     "Contacts the remote server to verify that the object implements this type.\n"
                     "Raises a local exception if a communication error occurs.\n"
-                    "@param __obj The untyped proxy.\n"
+                    "@param obj The untyped proxy.\n"
                     "@return A proxy for this type, or null if the object does not support this type.");
-    out << nl << "static " << p->name() << "Prx checkedCast(com.zeroc.Ice.ObjectPrx __obj)";
+    out << nl << "static " << p->name() << "Prx checkedCast(com.zeroc.Ice.ObjectPrx obj)";
     out << sb;
-    out << nl << "return com.zeroc.Ice.ObjectPrx.__checkedCast(__obj, ice_staticId, " << p->name()
+    out << nl << "return com.zeroc.Ice.ObjectPrx._checkedCast(obj, ice_staticId(), " << p->name()
         << "Prx.class, _" << p->name() << "PrxI.class);";
     out << eb;
 
@@ -4183,12 +4207,12 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     writeDocComment(out,
                     "Contacts the remote server to verify that the object implements this type.\n"
                     "Raises a local exception if a communication error occurs.\n"
-                    "@param __obj The untyped proxy.\n"
-                    "@param __ctx The Context map to send with the invocation.\n"
+                    "@param obj The untyped proxy.\n"
+                    "@param context The Context map to send with the invocation.\n"
                     "@return A proxy for this type, or null if the object does not support this type.");
-    out << nl << "static " << p->name() << "Prx checkedCast(com.zeroc.Ice.ObjectPrx __obj, " << contextParam << ')';
+    out << nl << "static " << p->name() << "Prx checkedCast(com.zeroc.Ice.ObjectPrx obj, " << contextParam << ')';
     out << sb;
-    out << nl << "return com.zeroc.Ice.ObjectPrx.__checkedCast(__obj, __ctx, ice_staticId, " << p->name()
+    out << nl << "return com.zeroc.Ice.ObjectPrx._checkedCast(obj, context, ice_staticId(), " << p->name()
         << "Prx.class, _" << p->name() << "PrxI.class);";
     out << eb;
 
@@ -4196,12 +4220,12 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     writeDocComment(out,
                     "Contacts the remote server to verify that a facet of the object implements this type.\n"
                     "Raises a local exception if a communication error occurs.\n"
-                    "@param __obj The untyped proxy.\n"
-                    "@param __facet The name of the desired facet.\n"
+                    "@param obj The untyped proxy.\n"
+                    "@param facet The name of the desired facet.\n"
                     "@return A proxy for this type, or null if the object does not support this type.");
-    out << nl << "static " << p->name() << "Prx checkedCast(com.zeroc.Ice.ObjectPrx __obj, String __facet)";
+    out << nl << "static " << p->name() << "Prx checkedCast(com.zeroc.Ice.ObjectPrx obj, String facet)";
     out << sb;
-    out << nl << "return com.zeroc.Ice.ObjectPrx.__checkedCast(__obj, __facet, ice_staticId, " << p->name()
+    out << nl << "return com.zeroc.Ice.ObjectPrx._checkedCast(obj, facet, ice_staticId(), " << p->name()
         << "Prx.class, _" << p->name() << "PrxI.class);";
     out << eb;
 
@@ -4209,37 +4233,37 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     writeDocComment(out,
                     "Contacts the remote server to verify that a facet of the object implements this type.\n"
                     "Raises a local exception if a communication error occurs.\n"
-                    "@param __obj The untyped proxy.\n"
-                    "@param __facet The name of the desired facet.\n"
-                    "@param __ctx The Context map to send with the invocation.\n"
+                    "@param obj The untyped proxy.\n"
+                    "@param facet The name of the desired facet.\n"
+                    "@param context The Context map to send with the invocation.\n"
                     "@return A proxy for this type, or null if the object does not support this type.");
-    out << nl << "static " << p->name() << "Prx checkedCast(com.zeroc.Ice.ObjectPrx __obj, String __facet, "
+    out << nl << "static " << p->name() << "Prx checkedCast(com.zeroc.Ice.ObjectPrx obj, String facet, "
         << contextParam << ')';
     out << sb;
-    out << nl << "return com.zeroc.Ice.ObjectPrx.__checkedCast(__obj, __facet, __ctx, ice_staticId, " << p->name()
+    out << nl << "return com.zeroc.Ice.ObjectPrx._checkedCast(obj, facet, context, ice_staticId(), " << p->name()
         << "Prx.class, _" << p->name() << "PrxI.class);";
     out << eb;
 
     out << sp;
     writeDocComment(out,
                     "Downcasts the given proxy to this type without contacting the remote server.\n"
-                    "@param __obj The untyped proxy.\n"
+                    "@param obj The untyped proxy.\n"
                     "@return A proxy for this type.");
-    out << nl << "static " << p->name() << "Prx uncheckedCast(com.zeroc.Ice.ObjectPrx __obj)";
+    out << nl << "static " << p->name() << "Prx uncheckedCast(com.zeroc.Ice.ObjectPrx obj)";
     out << sb;
-    out << nl << "return com.zeroc.Ice.ObjectPrx.__uncheckedCast(__obj, " << p->name() << "Prx.class, _"
+    out << nl << "return com.zeroc.Ice.ObjectPrx._uncheckedCast(obj, " << p->name() << "Prx.class, _"
         << p->name() << "PrxI.class);";
     out << eb;
 
     out << sp;
     writeDocComment(out,
                     "Downcasts the given proxy to this type without contacting the remote server.\n"
-                    "@param __obj The untyped proxy.\n"
-                    "@param __facet The name of the desired facet.\n"
+                    "@param obj The untyped proxy.\n"
+                    "@param facet The name of the desired facet.\n"
                     "@return A proxy for this type.");
-    out << nl << "static " << p->name() << "Prx uncheckedCast(com.zeroc.Ice.ObjectPrx __obj, String __facet)";
+    out << nl << "static " << p->name() << "Prx uncheckedCast(com.zeroc.Ice.ObjectPrx obj, String facet)";
     out << sb;
-    out << nl << "return com.zeroc.Ice.ObjectPrx.__uncheckedCast(__obj, __facet, " << p->name() << "Prx.class, _"
+    out << nl << "return com.zeroc.Ice.ObjectPrx._uncheckedCast(obj, facet, " << p->name() << "Prx.class, _"
         << p->name() << "PrxI.class);";
     out << eb;
 
@@ -4251,7 +4275,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_context(java.util.Map<String, String> newContext)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_context(newContext);";
+    out << nl << "return (" << p->name() << "Prx)_ice_context(newContext);";
     out << eb;
 
     out << sp;
@@ -4262,7 +4286,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_adapterId(String newAdapterId)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_adapterId(newAdapterId);";
+    out << nl << "return (" << p->name() << "Prx)_ice_adapterId(newAdapterId);";
     out << eb;
 
     out << sp;
@@ -4273,7 +4297,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_endpoints(com.zeroc.Ice.Endpoint[] newEndpoints)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_endpoints(newEndpoints);";
+    out << nl << "return (" << p->name() << "Prx)_ice_endpoints(newEndpoints);";
     out << eb;
 
     out << sp;
@@ -4284,7 +4308,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_locatorCacheTimeout(int newTimeout)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_locatorCacheTimeout(newTimeout);";
+    out << nl << "return (" << p->name() << "Prx)_ice_locatorCacheTimeout(newTimeout);";
     out << eb;
 
     out << sp;
@@ -4295,7 +4319,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_invocationTimeout(int newTimeout)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_invocationTimeout(newTimeout);";
+    out << nl << "return (" << p->name() << "Prx)_ice_invocationTimeout(newTimeout);";
     out << eb;
 
     out << sp;
@@ -4306,7 +4330,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_connectionCached(boolean newCache)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_connectionCached(newCache);";
+    out << nl << "return (" << p->name() << "Prx)_ice_connectionCached(newCache);";
     out << eb;
 
     out << sp;
@@ -4317,7 +4341,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_endpointSelection(com.zeroc.Ice.EndpointSelectionType newType)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_endpointSelection(newType);";
+    out << nl << "return (" << p->name() << "Prx)_ice_endpointSelection(newType);";
     out << eb;
 
     out << sp;
@@ -4330,7 +4354,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_secure(boolean b)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_secure(b);";
+    out << nl << "return (" << p->name() << "Prx)_ice_secure(b);";
     out << eb;
 
     out << sp;
@@ -4341,7 +4365,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_encodingVersion(com.zeroc.Ice.EncodingVersion e)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_encodingVersion(e);";
+    out << nl << "return (" << p->name() << "Prx)_ice_encodingVersion(e);";
     out << eb;
 
     out << sp;
@@ -4354,7 +4378,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_preferSecure(boolean b)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_preferSecure(b);";
+    out << nl << "return (" << p->name() << "Prx)_ice_preferSecure(b);";
     out << eb;
 
     out << sp;
@@ -4365,7 +4389,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_router(com.zeroc.Ice.RouterPrx router)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_router(router);";
+    out << nl << "return (" << p->name() << "Prx)_ice_router(router);";
     out << eb;
 
     out << sp;
@@ -4376,7 +4400,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_locator(com.zeroc.Ice.LocatorPrx locator)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_locator(locator);";
+    out << nl << "return (" << p->name() << "Prx)_ice_locator(locator);";
     out << eb;
 
     out << sp;
@@ -4387,7 +4411,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_collocationOptimized(boolean b)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_collocationOptimized(b);";
+    out << nl << "return (" << p->name() << "Prx)_ice_collocationOptimized(b);";
     out << eb;
 
     out << sp;
@@ -4397,7 +4421,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_twoway()";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_twoway();";
+    out << nl << "return (" << p->name() << "Prx)_ice_twoway();";
     out << eb;
 
     out << sp;
@@ -4407,7 +4431,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_oneway()";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_oneway();";
+    out << nl << "return (" << p->name() << "Prx)_ice_oneway();";
     out << eb;
 
     out << sp;
@@ -4417,7 +4441,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_batchOneway()";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_batchOneway();";
+    out << nl << "return (" << p->name() << "Prx)_ice_batchOneway();";
     out << eb;
 
     out << sp;
@@ -4427,7 +4451,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_datagram()";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_datagram();";
+    out << nl << "return (" << p->name() << "Prx)_ice_datagram();";
     out << eb;
 
     out << sp;
@@ -4437,7 +4461,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_batchDatagram()";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_batchDatagram();";
+    out << nl << "return (" << p->name() << "Prx)_ice_batchDatagram();";
     out << eb;
 
     out << sp;
@@ -4448,7 +4472,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_compress(boolean co)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_compress(co);";
+    out << nl << "return (" << p->name() << "Prx)_ice_compress(co);";
     out << eb;
 
     out << sp;
@@ -4459,7 +4483,7 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_timeout(int t)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_timeout(t);";
+    out << nl << "return (" << p->name() << "Prx)_ice_timeout(t);";
     out << eb;
 
     out << sp;
@@ -4470,15 +4494,13 @@ Slice::Gen::ProxyVisitor::visitClassDefEnd(const ClassDefPtr& p)
     out << nl << "@Override";
     out << nl << "default " << p->name() << "Prx ice_connectionId(String connectionId)";
     out << sb;
-    out << nl << "return (" << p->name() << "Prx)__ice_connectionId(connectionId);";
+    out << nl << "return (" << p->name() << "Prx)_ice_connectionId(connectionId);";
     out << eb;
 
     out << sp;
-    out << nl << "final static String ice_staticId = \"" << p->scoped() << "\";";
-    out << sp;
     out << nl << "static String ice_staticId()";
     out << sb;
-    out << nl << "return ice_staticId;";
+    out << nl << "return \"" << p->scoped() << "\";";
     out << eb;
 
     out << eb;
@@ -4541,8 +4563,9 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
     throws.sort(Slice::DerivedToBaseCompare());
 #endif
 
-    const string contextDoc = "@param __ctx The Context map to send with the invocation.";
-    const string contextParam = "java.util.Map<String, String> __ctx";
+    const string contextParamName = getEscapedParamName(p, "context");
+    const string contextDoc = "@param " + contextParamName +" The Context map to send with the invocation.";
+    const string contextParam = "java.util.Map<String, String> " + contextParamName;
     const string noExplicitContextArg = "com.zeroc.Ice.ObjectPrx.noExplicitContext";
 
     DocCommentPtr dc = parseDocComment(p);
@@ -4583,7 +4606,7 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
         {
             out << "return ";
         }
-        out << "__" << p->name() << "Async" << spar << args << "__ctx" << "true" << epar << ".__wait();";
+        out << "_iceI_" << p->name() << "Async" << spar << args << contextParamName << "true" << epar << ".waitForResponse();";
     }
     else
     {
@@ -4594,19 +4617,19 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
         {
             out << "return ";
         }
-        out << "__" << p->name() << "Async" << spar << args << "__ctx" << "true" << epar << ".__waitUserEx();";
+        out << "_iceI_" << p->name() << "Async" << spar << args << contextParamName << "true" << epar << ".waitForResponseOrUserEx();";
         out << eb;
         for(ExceptionList::const_iterator t = throws.begin(); t != throws.end(); ++t)
         {
             string exS = getAbsolute(*t, package);
-            out << nl << "catch(" << exS << " __ex)";
+            out << nl << "catch(" << exS << " ex)";
             out << sb;
-            out << nl << "throw __ex;";
+            out << nl << "throw ex;";
             out << eb;
         }
-        out << nl << "catch(com.zeroc.Ice.UserException __ex)";
+        out << nl << "catch(com.zeroc.Ice.UserException ex)";
         out << sb;
-        out << nl << "throw new com.zeroc.Ice.UnknownUserException(__ex.ice_id(), __ex);";
+        out << nl << "throw new com.zeroc.Ice.UnknownUserException(ex.ice_id(), ex);";
         out << eb;
     }
     out << eb;
@@ -4649,7 +4672,7 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
             {
                 out << "return ";
             }
-            out << "__" << p->name() << "Async" << spar << args << "__ctx" << "true" << epar << ".__wait();";
+            out << "_iceI_" << p->name() << "Async" << spar << args << contextParamName << "true" << epar << ".waitForResponse();";
         }
         else
         {
@@ -4660,19 +4683,19 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
             {
                 out << "return ";
             }
-            out << "__" << p->name() << "Async" << spar << args << "__ctx" << "true" << epar << ".__waitUserEx();";
+            out << "_iceI_" << p->name() << "Async" << spar << args << contextParamName << "true" << epar << ".waitForResponseOrUserEx();";
             out << eb;
             for(ExceptionList::const_iterator t = throws.begin(); t != throws.end(); ++t)
             {
                 string exS = getAbsolute(*t, package);
-                out << nl << "catch(" << exS << " __ex)";
+                out << nl << "catch(" << exS << " ex)";
                 out << sb;
-                out << nl << "throw __ex;";
+                out << nl << "throw ex;";
                 out << eb;
             }
-            out << nl << "catch(com.zeroc.Ice.UserException __ex)";
+            out << nl << "catch(com.zeroc.Ice.UserException ex)";
             out << sb;
-            out << nl << "throw new com.zeroc.Ice.UnknownUserException(__ex.ice_id(), __ex);";
+            out << nl << "throw new com.zeroc.Ice.UnknownUserException(ex.ice_id(), ex);";
             out << eb;
         }
         out << eb;
@@ -4692,7 +4715,7 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
     }
     out << nl << "default " << future << ' ' << p->name() << "Async" << spar << params << epar;
     out << sb;
-    out << nl << "return __" << p->name() << "Async" << spar << args << noExplicitContextArg << "false" << epar << ';';
+    out << nl << "return _iceI_" << p->name() << "Async" << spar << args << noExplicitContextArg << "false" << epar << ';';
     out << eb;
 
     out << sp;
@@ -4704,26 +4727,27 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
     }
     out << nl << "default " << future << ' ' << p->name() << "Async" << spar << params << contextParam << epar;
     out << sb;
-    out << nl << "return __" << p->name() << "Async" << spar << args << "__ctx" << "false" << epar << ';';
+    out << nl << "return _iceI_" << p->name() << "Async" << spar << args << "context" << "false" << epar << ';';
     out << eb;
 
     const string futureImpl = getFutureImplType(p, package);
 
     out << sp;
-    out << nl << "default " << futureImpl << " __" << p->name() << "Async" << spar << params << contextParam
-        << "boolean __sync" << epar;
+    out << nl << "default " << futureImpl << " _iceI_" << p->name() << "Async" << spar << getParamsProxy(p, package, false, true)
+        << "java.util.Map<String, String> context"
+        << "boolean sync" << epar;
     out << sb;
-    out << nl << futureImpl << " __f = new com.zeroc.IceInternal.OutgoingAsync<>(this, \"" << p->name() << "\", "
-        << sliceModeToIceMode(p->sendMode()) << ", __sync, "
-        << (throws.empty() ? "null" : "__" + p->name() + "_ex") << ");";
+    out << nl << futureImpl << " f = new com.zeroc.IceInternal.OutgoingAsync<>(this, \"" << p->name() << "\", "
+        << sliceModeToIceMode(p->sendMode()) << ", sync, "
+        << (throws.empty() ? "null" : "_iceE_" + p->name()) << ");";
 
-    out << nl << "__f.invoke(";
+    out << nl << "f.invoke(";
     out.useCurrentPosAsIndent();
-    out << (p->returnsData() ? "true" : "false") << ", __ctx, " << opFormatTypeToString(p)
+    out << (p->returnsData() ? "true" : "false") << ", context, " << opFormatTypeToString(p)
         << ", ";
     if(!p->inParameters().empty())
     {
-        out << "__os -> {";
+        out << "ostr -> {";
         out.inc();
         writeMarshalProxyParams(out, package, p, false);
         out.dec();
@@ -4736,7 +4760,7 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
     out << ", ";
     if(returnsParams)
     {
-        out << "__is -> {";
+        out << "istr -> {";
         out.inc();
         writeUnmarshalProxyResults(out, package, p);
         out.dec();
@@ -4748,12 +4772,12 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
     }
     out.restoreIndent();
     out << ");";
-    out << nl << "return __f;";
+    out << nl << "return f;";
     out << eb;
 
     if(!throws.empty())
     {
-        out << sp << nl << "static final Class<?>[] __" << p->name() << "_ex =";
+        out << sp << nl << "static final Class<?>[] _iceE_" << p->name() << " =";
         out << sb;
         for(ExceptionList::const_iterator t = throws.begin(); t != throws.end(); ++t)
         {
@@ -4779,7 +4803,7 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
         }
         out << nl << "default " << future << ' ' << p->name() << "Async" << spar << paramsOpt << epar;
         out << sb;
-        out << nl << "return __" << p->name() << "Async" << spar << args << noExplicitContextArg << "false" << epar
+        out << nl << "return _iceI_" << p->name() << "Async" << spar << args << noExplicitContextArg << "false" << epar
             << ';';
         out << eb;
 
@@ -4792,23 +4816,24 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
         }
         out << nl << "default " << future << ' ' << p->name() << "Async" << spar << paramsOpt << contextParam << epar;
         out << sb;
-        out << nl << "return __" << p->name() << "Async" << spar << args << "__ctx" << "false" << epar << ';';
+        out << nl << "return _iceI_" << p->name() << "Async" << spar << args << contextParamName << "false" << epar << ';';
         out << eb;
 
         out << sp;
-        out << nl << "default " << futureImpl << " __" << p->name() << "Async" << spar << paramsOpt << contextParam
-            << "boolean __sync" << epar;
+        out << nl << "default " << futureImpl << " _iceI_" << p->name() << "Async" << spar << getParamsProxy(p, package, true, true)
+            << "java.util.Map<String, String> context"
+            << "boolean sync" << epar;
         out << sb;
-        out << nl << futureImpl << " __f = new com.zeroc.IceInternal.OutgoingAsync<>(this, \"" << p->name() << "\", "
-            << sliceModeToIceMode(p->sendMode()) << ", __sync, "
-            << (throws.empty() ? "null" : "__" + p->name() + "_ex") << ");";
+        out << nl << futureImpl << " f = new com.zeroc.IceInternal.OutgoingAsync<>(this, \"" << p->name() << "\", "
+            << sliceModeToIceMode(p->sendMode()) << ", sync, "
+            << (throws.empty() ? "null" : "_iceE_" + p->name()) << ");";
 
-        out << nl << "__f.invoke(";
+        out << nl << "f.invoke(";
         out.useCurrentPosAsIndent();
-        out << (p->returnsData() ? "true" : "false") << ", __ctx, " << opFormatTypeToString(p) << ", ";
+        out << (p->returnsData() ? "true" : "false") << ", context, " << opFormatTypeToString(p) << ", ";
         if(!p->inParameters().empty())
         {
-            out << "__os -> {";
+            out << "ostr -> {";
             out.inc();
             writeMarshalProxyParams(out, package, p, true);
             out.dec();
@@ -4821,7 +4846,7 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
         out << ", ";
         if(returnsParams)
         {
-            out << "__is -> {";
+            out << "istr -> {";
             out.inc();
             writeUnmarshalProxyResults(out, package, p);
             out.dec();
@@ -4833,7 +4858,7 @@ Slice::Gen::ProxyVisitor::visitOperation(const OperationPtr& p)
         }
         out.restoreIndent();
         out << ");";
-        out << nl << "return __f;";
+        out << nl << "return f;";
         out << eb;
     }
 }
@@ -5064,7 +5089,7 @@ Slice::Gen::ImplVisitor::initResult(Output& out, const string& package, const Op
 
     if(op->hasMarshaledResult())
     {
-        out << nl << retS << " __r = new " << retS << spar;
+        out << nl << retS << " r = new " << retS << spar;
         const ParamDeclList outParams = op->outParameters();
         if(op->returnType())
         {
@@ -5074,16 +5099,16 @@ Slice::Gen::ImplVisitor::initResult(Output& out, const string& package, const Op
         {
             out << getDefaultValue(package, (*p)->type(), (*p)->optional());
         }
-        out << "__current" << epar << ';';
+        out << "current" << epar << ';';
     }
     else if(op->returnsMultipleValues())
     {
-        out << nl << retS << " __r = new " << retS << "();";
+        out << nl << retS << " r = new " << retS << "();";
         string retval = "returnValue";
         const ParamDeclList outParams = op->outParameters();
         for(ParamDeclList::const_iterator p = outParams.begin(); p != outParams.end(); ++p)
         {
-            out << nl << "__r." << fixKwd((*p)->name()) << " = "
+            out << nl << "r." << fixKwd((*p)->name()) << " = "
                 << getDefaultValue(package, (*p)->type(), (*p)->optional()) << ';';
             if((*p)->name() == "returnValue")
             {
@@ -5092,7 +5117,7 @@ Slice::Gen::ImplVisitor::initResult(Output& out, const string& package, const Op
         }
         if(op->returnType())
         {
-            out << nl << "__r." << retval << " = "
+            out << nl << "r." << retval << " = "
                 << getDefaultValue(package, op->returnType(), op->returnIsOptional()) << ';';
         }
     }
@@ -5112,7 +5137,7 @@ Slice::Gen::ImplVisitor::initResult(Output& out, const string& package, const Op
         }
         if(type)
         {
-            out << nl << retS << " __r = " << getDefaultValue(package, type, optional) << ';';
+            out << nl << retS << " r = " << getDefaultValue(package, type, optional) << ';';
         }
         else
         {
@@ -5135,6 +5160,7 @@ Slice::Gen::ImplVisitor::writeOperation(Output& out, const string& package, cons
     const ContainerPtr container = op->container();
     const ClassDefPtr cl = ClassDefPtr::dynamicCast(container);
     const vector<string> params = getParams(op, package);
+    const string currentParam = "com.zeroc.Ice.Current " + getEscapedParamName(op, "current");
 
     if(local)
     {
@@ -5155,7 +5181,7 @@ Slice::Gen::ImplVisitor::writeOperation(Output& out, const string& package, cons
         out << sb;
         if(initResult(out, package, op))
         {
-            out << nl << "return __r;";
+            out << nl << "return r;";
         }
         out << eb;
 
@@ -5179,12 +5205,12 @@ Slice::Gen::ImplVisitor::writeOperation(Output& out, const string& package, cons
             out << sp;
             out << nl << "@Override";
             out << nl << "public java.util.concurrent.CompletionStage<" << retS << "> " << opName << "Async" << spar
-                << params << "com.zeroc.Ice.Current __current" << epar;
+                << params << currentParam << epar;
             writeThrowsClause(package, throws);
             out << sb;
             if(initResult(out, package, op))
             {
-                out << nl << "return java.util.concurrent.CompletableFuture.completedFuture(__r);";
+                out << nl << "return java.util.concurrent.CompletableFuture.completedFuture(r);";
             }
             else
             {
@@ -5197,12 +5223,12 @@ Slice::Gen::ImplVisitor::writeOperation(Output& out, const string& package, cons
             out << sp;
             out << nl << "@Override";
             out << nl << "public " << getResultType(op, package, false, true) << ' ' << fixKwd(opName) << spar << params
-                << "com.zeroc.Ice.Current __current" << epar;
+                << currentParam << epar;
             writeThrowsClause(package, throws);
             out << sb;
             if(initResult(out, package, op))
             {
-                out << nl << "return __r;";
+                out << nl << "return r;";
             }
             out << eb;
         }
diff --git a/cpp/src/slice2java/Gen.h b/cpp/src/slice2java/Gen.h
index 102a71633f9..5e6046bcd85 100644
--- a/cpp/src/slice2java/Gen.h
+++ b/cpp/src/slice2java/Gen.h
@@ -56,7 +56,7 @@ protected:
     // Compose the parameter lists for an operation.
     //
     std::vector<std::string> getParams(const OperationPtr&, const std::string&);
-    std::vector<std::string> getParamsProxy(const OperationPtr&, const std::string&, bool);
+    std::vector<std::string> getParamsProxy(const OperationPtr&, const std::string&, bool, bool = false);
 
     //
     // Compose the argument lists for an operation.
@@ -83,8 +83,8 @@ protected:
     //
     // Marshal/unmarshal a data member.
     //
-    void writeMarshalDataMember(::IceUtilInternal::Output&, const std::string&, const DataMemberPtr&, int&);
-    void writeUnmarshalDataMember(::IceUtilInternal::Output&, const std::string&, const DataMemberPtr&, int&);
+    void writeMarshalDataMember(::IceUtilInternal::Output&, const std::string&, const DataMemberPtr&, int&, bool = false);
+    void writeUnmarshalDataMember(::IceUtilInternal::Output&, const std::string&, const DataMemberPtr&, int&, bool = false);
 
     //
     // Generate dispatch methods for a class or interface.
diff --git a/cpp/src/slice2java/GenCompat.cpp b/cpp/src/slice2java/GenCompat.cpp
index 43205b19db6..d5894291f3e 100644
--- a/cpp/src/slice2java/GenCompat.cpp
+++ b/cpp/src/slice2java/GenCompat.cpp
@@ -75,6 +75,35 @@ opFormatTypeToString(const OperationPtr& op)
 }
 
 string
+getEscapedParamName(const OperationPtr& p, const string& name)
+{
+    ParamDeclList params = p->parameters();
+
+    for(ParamDeclList::const_iterator i = params.begin(); i != params.end(); ++i)
+    {
+        if((*i)->name() == name)
+        {
+            return name + "_";
+        }
+    }
+    return name;
+}
+
+string
+getEscapedParamName(const DataMemberList& params, const string& name)
+{
+    for(DataMemberList::const_iterator i = params.begin(); i != params.end(); ++i)
+    {
+        if((*i)->name() == name)
+        {
+            return name + "_";
+        }
+    }
+    return name;
+}
+
+
+string
 getDeprecateReason(const ContainedPtr& p1, const ContainedPtr& p2, const string& type)
 {
     string deprecateMetadata, deprecateReason;
@@ -209,7 +238,7 @@ Slice::JavaCompatVisitor::getParams(const OperationPtr& op, const string& packag
 }
 
 vector<string>
-Slice::JavaCompatVisitor::getParamsProxy(const OperationPtr& op, const string& package, bool final, bool optionalMapping)
+Slice::JavaCompatVisitor::getParamsProxy(const OperationPtr& op, const string& package, bool final, bool optionalMapping, bool internal)
 {
     vector<string> params;
 
@@ -233,7 +262,7 @@ Slice::JavaCompatVisitor::getParamsProxy(const OperationPtr& op, const string& p
         {
             typeString = "final " + typeString;
         }
-        params.push_back(typeString + ' ' + fixKwd((*q)->name()));
+        params.push_back(typeString + ' ' + (internal ? "iceP_" + (*q)->name() : fixKwd((*q)->name())));
     }
 
     return params;
@@ -241,7 +270,7 @@ Slice::JavaCompatVisitor::getParamsProxy(const OperationPtr& op, const string& p
 
 vector<string>
 Slice::JavaCompatVisitor::getInOutParams(const OperationPtr& op, const string& package, ParamDir paramType, bool /*proxy*/,
-                                   bool optionalMapping)
+                                         bool optionalMapping, bool internal)
 {
     vector<string> params;
 
@@ -253,7 +282,7 @@ Slice::JavaCompatVisitor::getInOutParams(const OperationPtr& op, const string& p
             bool optional = optionalMapping && (*q)->optional();
             string typeString = typeToString((*q)->type(), paramType == InParam ? TypeModeIn : TypeModeOut, package,
                                              (*q)->getMetaData(), true, optional);
-            params.push_back(typeString + ' ' + fixKwd((*q)->name()));
+            params.push_back(typeString + ' ' + (internal ? "iceP_" + (*q)->name() : fixKwd((*q)->name())));
         }
     }
 
@@ -269,7 +298,7 @@ Slice::JavaCompatVisitor::getParamsAsync(const OperationPtr& op, const string& p
     ContainerPtr container = op->container();
     ClassDefPtr cl = ClassDefPtr::dynamicCast(container);
     string classNameAsync = getAbsolute(cl, package, amd ? "AMD_" : "AMI_", '_' + name);
-    params.insert(params.begin(), classNameAsync + " __cb");
+    params.insert(params.begin(), classNameAsync + " " + getEscapedParamName(op, "cb"));
 
     return params;
 }
@@ -284,7 +313,7 @@ Slice::JavaCompatVisitor::getParamsAsyncCB(const OperationPtr& op, const string&
     {
         string retS = typeToString(ret, TypeModeIn, package, op->getMetaData(), true,
                                    optionalMapping && op->returnIsOptional());
-        params.push_back(retS + " __ret");
+        params.push_back(retS + " ret");
     }
 
     ParamDeclList paramList = op->parameters();
@@ -497,32 +526,45 @@ Slice::JavaCompatVisitor::getLambdaResponseCB(const OperationPtr& op, const stri
 
 vector<string>
 Slice::JavaCompatVisitor::getParamsAsyncLambda(const OperationPtr& op, const string& package, bool context, bool sentCB,
-                                         bool optionalMapping, bool inParams)
+                                               bool optionalMapping, bool inParams, bool internal)
 {
     vector<string> params;
+    string contextParamName = "context";
+    string responseCbParamName = "responseCb";
+    string userExceptionCbParamName = "userExceptionCb";
+    string exceptionCbParamName = "exceptionCb";
+    string sentCbParamName = "sentCb";
 
     if(inParams)
     {
-        params = getInOutParams(op, package, InParam, false, optionalMapping);
+        params = getInOutParams(op, package, InParam, false, optionalMapping, internal);
+        if(!internal)
+        {
+            contextParamName = getEscapedParamName(op, contextParamName);
+            responseCbParamName = getEscapedParamName(op, responseCbParamName);
+            userExceptionCbParamName = getEscapedParamName(op, userExceptionCbParamName);
+            exceptionCbParamName = getEscapedParamName(op, exceptionCbParamName);
+            sentCbParamName = getEscapedParamName(op, sentCbParamName);
+        }
     }
 
     if(context)
     {
-        params.push_back("java.util.Map<String, String> __ctx");
+        params.push_back("java.util.Map<String, String> " + contextParamName);
     }
 
-    params.push_back(getLambdaResponseCB(op, package) + " __responseCb");
+    params.push_back(getLambdaResponseCB(op, package) + " " + responseCbParamName);
 
     if(!op->throws().empty())
     {
-        params.push_back("IceInternal.Functional_GenericCallback1<Ice.UserException> __userExceptionCb");
+        params.push_back("IceInternal.Functional_GenericCallback1<Ice.UserException> " + userExceptionCbParamName);
     }
 
-    params.push_back("IceInternal.Functional_GenericCallback1<Ice.Exception> __exceptionCb");
+    params.push_back("IceInternal.Functional_GenericCallback1<Ice.Exception> " + exceptionCbParamName);
 
     if(sentCB)
     {
-        params.push_back("IceInternal.Functional_BoolCallback __sentCb");
+        params.push_back("IceInternal.Functional_BoolCallback " + sentCbParamName);
     }
 
     return params;
@@ -532,16 +574,25 @@ vector<string>
 Slice::JavaCompatVisitor::getArgsAsyncLambda(const OperationPtr& op, const string& package, bool context, bool sentCB)
 {
     vector<string> args = getInOutArgs(op, InParam);
-    args.push_back(context ? "__ctx" : "null");
+
+    // "internal" is always false for this function
+
+    const string contextParamName = getEscapedParamName(op, "context");
+    const string responseCbParamName = getEscapedParamName(op, "responseCb");
+    const string userExceptionCbParamName = getEscapedParamName(op, "userExceptionCb");
+    const string exceptionCbParamName = getEscapedParamName(op, "exceptionCb");
+    const string sentCbParamName = getEscapedParamName(op, "sentCb");
+
+    args.push_back(context ? contextParamName : "null");
     args.push_back(context ? "true" : "false");
-    args.push_back("false"); // __synchronous
-    args.push_back("__responseCb");
+    args.push_back("false"); // synchronous param
+    args.push_back(responseCbParamName);
     if(!op->throws().empty())
     {
-        args.push_back("__userExceptionCb");
+        args.push_back(userExceptionCbParamName);
     }
-    args.push_back("__exceptionCb");
-    args.push_back(sentCB ? "__sentCb" : "null");
+    args.push_back(exceptionCbParamName);
+    args.push_back(sentCB ? sentCbParamName : "null");
     return args;
 }
 
@@ -560,7 +611,7 @@ Slice::JavaCompatVisitor::getArgs(const OperationPtr& op)
 }
 
 vector<string>
-Slice::JavaCompatVisitor::getInOutArgs(const OperationPtr& op, ParamDir paramType)
+Slice::JavaCompatVisitor::getInOutArgs(const OperationPtr& op, ParamDir paramType, bool internal)
 {
     vector<string> args;
 
@@ -569,7 +620,7 @@ Slice::JavaCompatVisitor::getInOutArgs(const OperationPtr& op, ParamDir paramTyp
     {
         if((*q)->isOutParam() == (paramType == OutParam))
         {
-            args.push_back(fixKwd((*q)->name()));
+            args.push_back(internal ? "iceP_" + (*q)->name() : fixKwd((*q)->name()));
         }
     }
 
@@ -580,7 +631,7 @@ vector<string>
 Slice::JavaCompatVisitor::getArgsAsync(const OperationPtr& op)
 {
     vector<string> args = getInOutArgs(op, InParam);
-    args.insert(args.begin(), "__cb");
+    args.insert(args.begin(), getEscapedParamName(op, "cb"));
     return args;
 }
 
@@ -595,11 +646,11 @@ Slice::JavaCompatVisitor::getArgsAsyncCB(const OperationPtr& op)
         BuiltinPtr builtin = BuiltinPtr::dynamicCast(ret);
         if((builtin && builtin->kind() == Builtin::KindObject) || ClassDeclPtr::dynamicCast(ret))
         {
-            args.push_back("__ret.value");
+            args.push_back("ret.value");
         }
         else
         {
-            args.push_back("__ret");
+            args.push_back("ret");
         }
     }
 
@@ -625,9 +676,15 @@ Slice::JavaCompatVisitor::getArgsAsyncCB(const OperationPtr& op)
 
 void
 Slice::JavaCompatVisitor::writeMarshalUnmarshalParams(Output& out, const string& package, const ParamDeclList& params,
-                                                const OperationPtr& op, int& iter, bool marshal, bool optionalMapping,
-                                                bool dispatch)
+                                                      const OperationPtr& op, int& iter, bool marshal, bool optionalMapping,
+                                                      bool internal, const string& customRetName, bool dispatch)
 {
+    string stream = "";
+    if(!internal)
+    {
+        stream = marshal ? "ostr_" : "istr_";
+    }
+
     ParamDeclList optionals;
     for(ParamDeclList::const_iterator pli = params.begin(); pli != params.end(); ++pli)
     {
@@ -637,7 +694,7 @@ Slice::JavaCompatVisitor::writeMarshalUnmarshalParams(Output& out, const string&
         }
         else
         {
-            string paramName = fixKwd((*pli)->name());
+            string paramName = internal ? "iceP_" + (*pli)->name() : fixKwd((*pli)->name());
             bool holder = marshal == dispatch;
             string patchParams;
             if(!marshal)
@@ -645,10 +702,16 @@ Slice::JavaCompatVisitor::writeMarshalUnmarshalParams(Output& out, const string&
                 patchParams = paramName;
             }
             writeMarshalUnmarshalCode(out, package, (*pli)->type(), OptionalNone, false, 0, paramName, marshal,
-                                      iter, holder, (*pli)->getMetaData(), patchParams);
+                                      iter, holder, stream, (*pli)->getMetaData(), patchParams);
         }
     }
 
+    string retName = customRetName;
+    if(retName.empty())
+    {
+        retName = internal ? "ret" : "ret_";
+    }
+
     TypePtr ret;
     bool returnsObject = false;
 
@@ -667,27 +730,27 @@ Slice::JavaCompatVisitor::writeMarshalUnmarshalParams(Output& out, const string&
         {
             if(optional)
             {
-                out << nl << retS << " __ret = new " << retS << "();";
+                out << nl << retS << " " << retName << " = new " << retS << "();";
             }
             else if(returnsObject)
             {
-                out << nl << retS << "Holder __ret = new " << retS << "Holder();";
+                out << nl << retS << "Holder " << retName << " = new " << retS << "Holder();";
                 holder = true;
             }
             else if(StructPtr::dynamicCast(ret))
             {
-                out << nl << retS << " __ret = null;";
+                out << nl << retS << " " << retName << " = null;";
             }
             else
             {
-                out << nl << retS << " __ret;";
+                out << nl << retS << " " << retName << ";";
             }
         }
 
         if(!op->returnIsOptional())
         {
-            writeMarshalUnmarshalCode(out, package, ret, OptionalNone, false, 0, "__ret", marshal, iter, holder,
-                                      op->getMetaData());
+            writeMarshalUnmarshalCode(out, package, ret, OptionalNone, false, 0, retName, marshal, iter, holder,
+                                      stream, op->getMetaData());
         }
     }
 
@@ -714,7 +777,7 @@ Slice::JavaCompatVisitor::writeMarshalUnmarshalParams(Output& out, const string&
         if(checkReturnType && op->returnTag() < (*pli)->tag())
         {
             writeMarshalUnmarshalCode(out, package, ret, OptionalReturnParam, optionalMapping, op->returnTag(),
-                                      "__ret", marshal, iter, false, op->getMetaData());
+                                      retName, marshal, iter, false, stream, op->getMetaData());
             checkReturnType = false;
         }
 
@@ -722,13 +785,14 @@ Slice::JavaCompatVisitor::writeMarshalUnmarshalParams(Output& out, const string&
 
         writeMarshalUnmarshalCode(out, package, (*pli)->type(),
                                   (*pli)->isOutParam() ? OptionalOutParam : OptionalInParam, optionalMapping,
-                                  (*pli)->tag(), fixKwd((*pli)->name()), marshal, iter, holder, (*pli)->getMetaData());
+                                  (*pli)->tag(), internal ? "iceP_" + (*pli)->name() : fixKwd((*pli)->name()),
+                                  marshal, iter, holder, stream, (*pli)->getMetaData());
     }
 
     if(checkReturnType)
     {
-        writeMarshalUnmarshalCode(out, package, ret, OptionalReturnParam, optionalMapping, op->returnTag(), "__ret",
-                                  marshal, iter, false, op->getMetaData());
+        writeMarshalUnmarshalCode(out, package, ret, OptionalReturnParam, optionalMapping, op->returnTag(), retName,
+                                  marshal, iter, false, stream, op->getMetaData());
     }
 }
 
@@ -757,27 +821,35 @@ Slice::JavaCompatVisitor::writeThrowsClause(const string& package, const Excepti
 }
 
 void
-Slice::JavaCompatVisitor::writeMarshalDataMember(Output& out, const string& package, const DataMemberPtr& member, int& iter)
+Slice::JavaCompatVisitor::writeMarshalDataMember(Output& out, const string& package, const DataMemberPtr& member, int& iter, bool forStruct)
 {
     if(!member->optional())
     {
-        writeMarshalUnmarshalCode(out, package, member->type(), OptionalNone, false, 0, fixKwd(member->name()),
-                                  true, iter, false, member->getMetaData());
+        string stream = forStruct ? "" : "ostr_";
+        string memberName = fixKwd(member->name());
+        if(forStruct)
+        {
+            memberName = "this." + memberName;
+        }
+
+        writeMarshalUnmarshalCode(out, package, member->type(), OptionalNone, false, 0, memberName,
+                                  true, iter, false, stream, member->getMetaData());
     }
     else
     {
-        out << nl << "if(__has_" << member->name() << " && __os.writeOptional(" << member->tag() << ", "
+        assert(!forStruct);
+        out << nl << "if(_" << member->name() << " && ostr_.writeOptional(" << member->tag() << ", "
             << getOptionalFormat(member->type()) << "))";
         out << sb;
         writeMarshalUnmarshalCode(out, package, member->type(), OptionalMember, false, 0, fixKwd(member->name()), true,
-                                  iter, false, member->getMetaData());
+                                  iter, false, "ostr_", member->getMetaData());
         out << eb;
     }
 }
 
 void
 Slice::JavaCompatVisitor::writeUnmarshalDataMember(Output& out, const string& package, const DataMemberPtr& member,
-                                             int& iter, bool needPatcher, int& patchIter)
+                                                   int& iter, bool needPatcher, int& patchIter, bool forStruct)
 {
     string patchParams;
     if(needPatcher)
@@ -793,23 +865,31 @@ Slice::JavaCompatVisitor::writeUnmarshalDataMember(Output& out, const string& pa
 
     if(!member->optional())
     {
-        writeMarshalUnmarshalCode(out, package, member->type(), OptionalNone, false, 0, fixKwd(member->name()), false,
-                                  iter, false, member->getMetaData(), patchParams);
+        string stream = forStruct ? "" : "istr_";
+        string memberName = fixKwd(member->name());
+        if(forStruct)
+        {
+            memberName = "this." + memberName;
+        }
+
+        writeMarshalUnmarshalCode(out, package, member->type(), OptionalNone, false, 0, memberName, false,
+                                  iter, false, stream, member->getMetaData(), patchParams);
     }
     else
     {
-        out << nl << "if(__has_" << member->name() << " = __is.readOptional(" << member->tag() << ", "
+        assert(!forStruct);
+        out << nl << "if(_" << member->name() << " = istr_.readOptional(" << member->tag() << ", "
             << getOptionalFormat(member->type()) << "))";
         out << sb;
         writeMarshalUnmarshalCode(out, package, member->type(), OptionalMember, false, 0, fixKwd(member->name()), false,
-                                  iter, false, member->getMetaData(), patchParams);
+                                  iter, false, "istr_", member->getMetaData(), patchParams);
         out << eb;
     }
 }
 
 void
 Slice::JavaCompatVisitor::writePatcher(Output& out, const string& package, const DataMemberList& classMembers,
-                                 const DataMemberList& optionalMembers)
+                                       const DataMemberList& optionalMembers)
 {
     out << sp << nl << "private class Patcher implements Ice.ReadValueCallback";
     out << sb;
@@ -817,7 +897,7 @@ Slice::JavaCompatVisitor::writePatcher(Output& out, const string& package, const
     {
         out << sp << nl << "Patcher(int member)";
         out << sb;
-        out << nl << "__member = member;";
+        out << nl << "_member = member;";
         out << eb;
     }
 
@@ -825,7 +905,7 @@ Slice::JavaCompatVisitor::writePatcher(Output& out, const string& package, const
     out << sb;
     if(classMembers.size() > 1)
     {
-        out << nl << "switch(__member)";
+        out << nl << "switch(_member)";
         out << sb;
     }
     int memberCount = 0;
@@ -849,11 +929,11 @@ Slice::JavaCompatVisitor::writePatcher(Output& out, const string& package, const
             out.inc();
             if(b)
             {
-                out << nl << "__typeId = Ice.ObjectImpl.ice_staticId();";
+                out << nl << "_typeId = Ice.ObjectImpl.ice_staticId();";
             }
             else
             {
-                out << nl << "__typeId = \"" << (*d)->type()->typeId() << "\";";
+                out << nl << "_typeId = \"" << (*d)->type()->typeId() << "\";";
             }
         }
 
@@ -903,11 +983,11 @@ Slice::JavaCompatVisitor::writePatcher(Output& out, const string& package, const
                 out.inc();
                 if(b)
                 {
-                    out << nl << "__typeId = Ice.ObjectImpl.ice_staticId();";
+                    out << nl << "_typeId = Ice.ObjectImpl.ice_staticId();";
                 }
                 else
                 {
-                    out << nl << "__typeId = \"" << (*d)->type()->typeId() << "\";";
+                    out << nl << "_typeId = \"" << (*d)->type()->typeId() << "\";";
                 }
             }
 
@@ -950,7 +1030,7 @@ Slice::JavaCompatVisitor::writePatcher(Output& out, const string& package, const
     out << sb;
     if(classMembers.size() > 1)
     {
-        out << nl << "return __typeId;";
+        out << nl << "return _typeId;";
     }
     else
     {
@@ -960,8 +1040,8 @@ Slice::JavaCompatVisitor::writePatcher(Output& out, const string& package, const
 
     if(classMembers.size() > 1)
     {
-        out << sp << nl << "private int __member;";
-        out << nl << "private String __typeId;";
+        out << sp << nl << "private int _member;";
+        out << nl << "private String _typeId;";
     }
 
     out << eb;
@@ -994,7 +1074,7 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
     assert(scopedIter != ids.end());
     StringList::difference_type scopedPos = ::IceUtilInternal::distance(firstIter, scopedIter);
 
-    out << sp << nl << "public static final String[] __ids =";
+    out << sp << nl << "private static final String[] _ids =";
     out << sb;
 
     for(StringList::const_iterator q = ids.begin(); q != ids.end();)
@@ -1009,37 +1089,37 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
 
     out << sp << nl << "public boolean ice_isA(String s)";
     out << sb;
-    out << nl << "return java.util.Arrays.binarySearch(__ids, s) >= 0;";
+    out << nl << "return java.util.Arrays.binarySearch(_ids, s) >= 0;";
     out << eb;
 
-    out << sp << nl << "public boolean ice_isA(String s, Ice.Current __current)";
+    out << sp << nl << "public boolean ice_isA(String s, Ice.Current current)";
     out << sb;
-    out << nl << "return java.util.Arrays.binarySearch(__ids, s) >= 0;";
+    out << nl << "return java.util.Arrays.binarySearch(_ids, s) >= 0;";
     out << eb;
 
     out << sp << nl << "public String[] ice_ids()";
     out << sb;
-    out << nl << "return __ids;";
+    out << nl << "return _ids;";
     out << eb;
 
-    out << sp << nl << "public String[] ice_ids(Ice.Current __current)";
+    out << sp << nl << "public String[] ice_ids(Ice.Current current)";
     out << sb;
-    out << nl << "return __ids;";
+    out << nl << "return _ids;";
     out << eb;
 
     out << sp << nl << "public String ice_id()";
     out << sb;
-    out << nl << "return __ids[" << scopedPos << "];";
+    out << nl << "return _ids[" << scopedPos << "];";
     out << eb;
 
-    out << sp << nl << "public String ice_id(Ice.Current __current)";
+    out << sp << nl << "public String ice_id(Ice.Current current)";
     out << sb;
-    out << nl << "return __ids[" << scopedPos << "];";
+    out << nl << "return _ids[" << scopedPos << "];";
     out << eb;
 
     out << sp << nl << "public static String ice_staticId()";
     out << sb;
-    out << nl << "return __ids[" << scopedPos << "];";
+    out << nl << "return _ids[" << scopedPos << "];";
     out << eb;
 
     OperationList ops = p->allOperations();
@@ -1185,8 +1265,8 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
         {
             out << nl << "/** @deprecated **/";
         }
-        out << nl << "public static boolean ___" << opName << '(' << name
-            << " __obj, IceInternal.Incoming __inS, Ice.Current __current)";
+        out << nl << "public static boolean _iceD_" << opName << '(' << name
+            << " obj, IceInternal.Incoming inS, Ice.Current current)";
         out.inc();
         out << nl << "throws Ice.UserException";
         out.dec();
@@ -1217,18 +1297,18 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
 
             int iter;
 
-            out << nl << "__checkMode(" << sliceModeToIceMode(op->mode()) << ", __current.mode);";
+            out << nl << "_iceCheckMode(" << sliceModeToIceMode(op->mode()) << ", current.mode);";
 
             if(!inParams.empty())
             {
                 //
                 // Unmarshal 'in' parameters.
                 //
-                out << nl << "Ice.InputStream __is = __inS.startReadParams();";
+                out << nl << "Ice.InputStream istr = inS.startReadParams();";
                 for(ParamDeclList::const_iterator pli = inParams.begin(); pli != inParams.end(); ++pli)
                 {
                     TypePtr paramType = (*pli)->type();
-                    string paramName = fixKwd((*pli)->name());
+                    string paramName = "iceP_" + (*pli)->name();
                     string typeS = typeToString(paramType, TypeModeIn, package, (*pli)->getMetaData(),
                                                 true, (*pli)->optional());
                     if((*pli)->optional())
@@ -1253,20 +1333,20 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
                     }
                 }
                 iter = 0;
-                writeMarshalUnmarshalParams(out, package, inParams, 0, iter, false, true, true);
+                writeMarshalUnmarshalParams(out, package, inParams, 0, iter, false, true, true, "", true);
                 if(op->sendsClasses(false))
                 {
-                    out << nl << "__is.readPendingValues();";
+                    out << nl << "istr.readPendingValues();";
                 }
-                out << nl << "__inS.endReadParams();";
+                out << nl << "inS.endReadParams();";
             }
             else
             {
-                out << nl << "__inS.readEmptyParams();";
+                out << nl << "inS.readEmptyParams();";
             }
             if(op->format() != DefaultFormat)
             {
-                out << nl << "__inS.setFormat(" << opFormatTypeToString(op) << ");";
+                out << nl << "inS.setFormat(" << opFormatTypeToString(op) << ");";
             }
 
             //
@@ -1276,7 +1356,7 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
             {
                 string typeS = typeToString((*pli)->type(), TypeModeOut, package, (*pli)->getMetaData(), true,
                                             optionalMapping && (*pli)->optional());
-                out << nl << typeS << ' ' << fixKwd((*pli)->name()) << " = new " << typeS << "();";
+                out << nl << typeS << " iceP_" << (*pli)->name() << " = new " << typeS << "();";
             }
 
             //
@@ -1287,13 +1367,13 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
             {
                 string retS = typeToString(ret, TypeModeReturn, package, opMetaData, true,
                                            optionalMapping && op->returnIsOptional());
-                out << retS << " __ret = ";
+                out << retS << " ret = ";
             }
-            out << "__obj." << fixKwd(opName) << '(';
+            out << "obj." << fixKwd(opName) << '(';
             for(ParamDeclList::const_iterator pli = inParams.begin(); pli != inParams.end(); ++pli)
             {
                 TypePtr paramType = (*pli)->type();
-                out << fixKwd((*pli)->name());
+                out << "iceP_" << (*pli)->name();
                 if(!(*pli)->optional())
                 {
                     BuiltinPtr builtin = BuiltinPtr::dynamicCast(paramType);
@@ -1306,26 +1386,26 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
             }
             for(ParamDeclList::const_iterator pli = outParams.begin(); pli != outParams.end(); ++pli)
             {
-                out << fixKwd((*pli)->name()) << ", ";
+                out << "iceP_" << (*pli)->name() << ", ";
             }
-            out << "__current);";
+            out << "current);";
 
             //
             // Marshal 'out' parameters and return value.
             //
             if(!outParams.empty() || ret)
             {
-                out << nl << "Ice.OutputStream __os = __inS.startWriteParams();";
-                writeMarshalUnmarshalParams(out, package, outParams, op, iter, true, optionalMapping, true);
+                out << nl << "Ice.OutputStream ostr = inS.startWriteParams();";
+                writeMarshalUnmarshalParams(out, package, outParams, op, iter, true, optionalMapping, true, "", true);
                 if(op->returnsClasses(false))
                 {
-                    out << nl << "__os.writePendingValues();";
+                    out << nl << "ostr.writePendingValues();";
                 }
-                out << nl << "__inS.endWriteParams();";
+                out << nl << "inS.endWriteParams();";
             }
             else
             {
-                out << nl << "__inS.writeEmptyParams();";
+                out << nl << "inS.writeEmptyParams();";
             }
             out << nl << "return false;";
 
@@ -1345,19 +1425,19 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
 
             int iter;
 
-            out << nl << "__checkMode(" << sliceModeToIceMode(op->mode()) << ", __current.mode);";
+            out << nl << "_iceCheckMode(" << sliceModeToIceMode(op->mode()) << ", current.mode);";
 
             if(!inParams.empty())
             {
                 //
                 // Unmarshal 'in' parameters.
                 //
-                out << nl << "Ice.InputStream __is = __inS.startReadParams();";
+                out << nl << "Ice.InputStream istr = inS.startReadParams();";
                 iter = 0;
                 for(ParamDeclList::const_iterator pli = inParams.begin(); pli != inParams.end(); ++pli)
                 {
                     TypePtr paramType = (*pli)->type();
-                    string paramName = fixKwd((*pli)->name());
+                    string paramName = "iceP_" + (*pli)->name();
                     string typeS = typeToString(paramType, TypeModeIn, package, (*pli)->getMetaData(),
                                                 true, (*pli)->optional());
                     if((*pli)->optional())
@@ -1381,33 +1461,33 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
                         }
                     }
                 }
-                writeMarshalUnmarshalParams(out, package, inParams, 0, iter, false, true, true);
+                writeMarshalUnmarshalParams(out, package, inParams, 0, iter, false, true, true, "", true);
                 if(op->sendsClasses(false))
                 {
-                    out << nl << "__is.readPendingValues();";
+                    out << nl << "istr.readPendingValues();";
                 }
-                out << nl << "__inS.endReadParams();";
+                out << nl << "inS.endReadParams();";
             }
             else
             {
-                out << nl << "__inS.readEmptyParams();";
+                out << nl << "inS.readEmptyParams();";
             }
             if(op->format() != DefaultFormat)
             {
-                out << nl << "__inS.setFormat(" << opFormatTypeToString(op) << ");";
+                out << nl << "inS.setFormat(" << opFormatTypeToString(op) << ");";
             }
 
             //
             // Call on the servant.
             //
             string classNameAMD = "AMD_" + p->name();
-            out << nl << classNameAMD << '_' << opName << " __cb = new _" << classNameAMD << '_' << opName
-                << "(__inS);";
-            out << nl << "__obj." << (amd ? opName + "_async" : fixKwd(opName)) << (amd ? "(__cb, " : "(");
+            out << nl << classNameAMD << '_' << opName << " cb = new _" << classNameAMD << '_' << opName
+                << "(inS);";
+            out << nl << "obj." << (amd ? opName + "_async" : fixKwd(opName)) << (amd ? "(cb, " : "(");
             for(ParamDeclList::const_iterator pli = inParams.begin(); pli != inParams.end(); ++pli)
             {
                 TypePtr paramType = (*pli)->type();
-                out << fixKwd((*pli)->name());
+                out << "iceP_" << (*pli)->name();
                 if(!(*pli)->optional())
                 {
                     BuiltinPtr builtin = BuiltinPtr::dynamicCast(paramType);
@@ -1418,7 +1498,7 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
                 }
                 out << ", ";
             }
-            out << "__current);";
+            out << "current);";
             out << nl << "return true;";
 
             out << eb;
@@ -1437,7 +1517,7 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
         allOpNames.sort();
         allOpNames.unique();
 
-        out << sp << nl << "private final static String[] __all =";
+        out << sp << nl << "private final static String[] _all =";
         out << sb;
         for(StringList::const_iterator q = allOpNames.begin(); q != allOpNames.end();)
         {
@@ -1466,15 +1546,15 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
                 break;
             }
         }
-        out << nl << "public boolean __dispatch(IceInternal.Incoming in, Ice.Current __current)";
+        out << nl << "public boolean _iceDispatch(IceInternal.Incoming in, Ice.Current current)";
         out.inc();
         out << nl << "throws Ice.UserException";
         out.dec();
         out << sb;
-        out << nl << "int pos = java.util.Arrays.binarySearch(__all, __current.operation);";
+        out << nl << "int pos = java.util.Arrays.binarySearch(_all, current.operation);";
         out << nl << "if(pos < 0)";
         out << sb;
-        out << nl << "throw new Ice.OperationNotExistException(__current.id, __current.facet, __current.operation);";
+        out << nl << "throw new Ice.OperationNotExistException(current.id, current.facet, current.operation);";
         out << eb;
         out << sp << nl << "switch(pos)";
         out << sb;
@@ -1487,19 +1567,19 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
             out << sb;
             if(opName == "ice_id")
             {
-                out << nl << "return ___ice_id(this, in, __current);";
+                out << nl << "return _iceD_ice_id(this, in, current);";
             }
             else if(opName == "ice_ids")
             {
-                out << nl << "return ___ice_ids(this, in, __current);";
+                out << nl << "return _iceD_ice_ids(this, in, current);";
             }
             else if(opName == "ice_isA")
             {
-                out << nl << "return ___ice_isA(this, in, __current);";
+                out << nl << "return _iceD_ice_isA(this, in, current);";
             }
             else if(opName == "ice_ping")
             {
-                out << nl << "return ___ice_ping(this, in, __current);";
+                out << nl << "return _iceD_ice_ping(this, in, current);";
             }
             else
             {
@@ -1515,7 +1595,7 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
                         assert(cl);
                         if(cl->scoped() == p->scoped())
                         {
-                            out << nl << "return ___" << opName << "(this, in, __current);";
+                            out << nl << "return _iceD_" << opName << "(this, in, current);";
                         }
                         else
                         {
@@ -1528,7 +1608,7 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
                             {
                                 base = getAbsolute(cl, package);
                             }
-                            out << nl << "return " << base << ".___" << opName << "(this, in, __current);";
+                            out << nl << "return " << base << "._iceD_" << opName << "(this, in, current);";
                         }
                         break;
                     }
@@ -1538,7 +1618,7 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
         }
         out << eb;
         out << sp << nl << "assert(false);";
-        out << nl << "throw new Ice.OperationNotExistException(__current.id, __current.facet, __current.operation);";
+        out << nl << "throw new Ice.OperationNotExistException(current.id, current.facet, current.operation);";
         out << eb;
 
         //
@@ -1557,7 +1637,7 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
 
         if(!attributesMap.empty())
         {
-            out << sp << nl << "private final static int[] __operationAttributes =";
+            out << sp << nl << "private final static int[] _operationAttributes =";
             out << sb;
             for(StringList::const_iterator q = allOpNames.begin(); q != allOpNames.end();)
             {
@@ -1579,12 +1659,12 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
 
             out << sp << nl << "public int ice_operationAttributes(String operation)";
             out << sb;
-            out << nl << "int pos = java.util.Arrays.binarySearch(__all, operation);";
+            out << nl << "int pos = java.util.Arrays.binarySearch(_all, operation);";
             out << nl << "if(pos < 0)";
             out << sb;
             out << nl << "return -1;";
             out << eb;
-            out << sp << nl << "return __operationAttributes[pos];";
+            out << sp << nl << "return _operationAttributes[pos];";
             out << eb;
         }
     }
@@ -1597,24 +1677,24 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
 
     if(preserved && !basePreserved)
     {
-        out << sp << nl << "public void __write(Ice.OutputStream __os)";
+        out << sp << nl << "public void _iceWrite(Ice.OutputStream ostr)";
         out << sb;
-        out << nl << "__os.startValue(__slicedData);";
-        out << nl << "__writeImpl(__os);";
-        out << nl << "__os.endValue();";
+        out << nl << "ostr.startValue(_iceSlicedData);";
+        out << nl << "_iceWriteImpl(ostr);";
+        out << nl << "ostr.endValue();";
         out << eb;
 
-        out << sp << nl << "public void __read(Ice.InputStream __is)";
+        out << sp << nl << "public void _iceRead(Ice.InputStream istr)";
         out << sb;
-        out << nl << "__is.startValue();";
-        out << nl << "__readImpl(__is);";
-        out << nl << "__slicedData = __is.endValue(true);";
+        out << nl << "istr.startValue();";
+        out << nl << "_iceReadImpl(istr);";
+        out << nl << "_iceSlicedData = istr.endValue(true);";
         out << eb;
     }
 
-    out << sp << nl << "protected void __writeImpl(Ice.OutputStream __os)";
+    out << sp << nl << "protected void _iceWriteImpl(Ice.OutputStream ostr_)";
     out << sb;
-    out << nl << "__os.startSlice(ice_staticId(), " << p->compactId() << (!base ? ", true" : ", false") << ");";
+    out << nl << "ostr_.startSlice(ice_staticId(), " << p->compactId() << (!base ? ", true" : ", false") << ");";
     iter = 0;
     for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
     {
@@ -1627,10 +1707,10 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
     {
         writeMarshalDataMember(out, package, *d, iter);
     }
-    out << nl << "__os.endSlice();";
+    out << nl << "ostr_.endSlice();";
     if(base)
     {
-        out << nl << "super.__writeImpl(__os);";
+        out << nl << "super._iceWriteImpl(ostr_);";
     }
     out << eb;
 
@@ -1642,9 +1722,9 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
         writePatcher(out, package, classMembers, optionalMembers);
     }
 
-    out << sp << nl << "protected void __readImpl(Ice.InputStream __is)";
+    out << sp << nl << "protected void _iceReadImpl(Ice.InputStream istr_)";
     out << sb;
-    out << nl << "__is.startSlice();";
+    out << nl << "istr_.startSlice();";
 
     int patchIter = 0;
     const bool needCustomPatcher = classMembers.size() > 1;
@@ -1660,16 +1740,16 @@ Slice::JavaCompatVisitor::writeDispatchAndMarshalling(Output& out, const ClassDe
     {
         writeUnmarshalDataMember(out, package, *d, iter, needCustomPatcher, patchIter);
     }
-    out << nl << "__is.endSlice();";
+    out << nl << "istr_.endSlice();";
     if(base)
     {
-        out << nl << "super.__readImpl(__is);";
+        out << nl << "super._iceReadImpl(istr_);";
     }
     out << eb;
 
     if(preserved && !basePreserved)
     {
-        out << sp << nl << "protected Ice.SlicedData __slicedData;";
+        out << sp << nl << "protected Ice.SlicedData _iceSlicedData;";
     }
 }
 
@@ -1970,7 +2050,7 @@ Slice::JavaCompatVisitor::writeDocCommentAsync(Output& out, const OperationPtr&
                 if(i->find(returnTag) != string::npos)
                 {
                     foundReturn = true;
-                    out << nl << " * @param __ret (return value)" << i->substr(returnTag.length());
+                    out << nl << " * @param ret (return value)" << i->substr(returnTag.length());
                 }
             }
             else
@@ -2099,7 +2179,7 @@ Slice::JavaCompatVisitor::writeDocCommentAMI(Output& out, const OperationPtr& p,
     }
     else
     {
-        out << nl << " * @param __result The asynchronous result object.";
+        out << nl << " * @param result The asynchronous result object.";
         //
         // Print @return, @throws, and @see tags.
         //
@@ -2153,7 +2233,7 @@ Slice::JavaCompatVisitor::writeDocCommentParam(Output& out, const OperationPtr&
     //
     if(cb && paramType == InParam)
     {
-        out << nl << " * @param __cb The callback object for the operation.";
+        out << nl << " * @param cb The callback object for the operation.";
     }
 
     //
@@ -2419,9 +2499,11 @@ Slice::GenCompat::OpsVisitor::writeOperations(const ClassDefPtr& p, bool noCurre
 
         string deprecateReason = getDeprecateReason(*r, p, "operation");
         string extraCurrent;
+        string currentParamName = getEscapedParamName(op, "current");
+
         if(!noCurrent && !p->isLocal())
         {
-            extraCurrent = "@param __current The Current object for the invocation.";
+            extraCurrent = "@param " + currentParamName + " The Current object for the invocation.";
         }
         if(amd)
         {
@@ -2434,7 +2516,7 @@ Slice::GenCompat::OpsVisitor::writeOperations(const ClassDefPtr& p, bool noCurre
         out << nl << retS << ' ' << (amd ? opname + "_async" : fixKwd(opname)) << spar << params;
         if(!noCurrent && !p->isLocal())
         {
-            out << "Ice.Current __current";
+            out << "Ice.Current " + currentParamName;
         }
         out << epar;
         if(op->hasMetaData("UserException"))
@@ -2691,7 +2773,8 @@ Slice::GenCompat::TypesVisitor::visitClassDefStart(const ClassDefPtr& p)
                 {
                     out << "public abstract ";
                 }
-                out << "Ice.AsyncResult begin_" << opname << spar << inParams << "Ice.Callback __cb" << epar << ';';
+                out << "Ice.AsyncResult begin_" << opname << spar << inParams << "Ice.Callback " + getEscapedParamName(op, "cb")
+                    << epar << ';';
 
                 out << sp;
                 writeDocCommentAMI(out, op, InParam);
@@ -2700,10 +2783,9 @@ Slice::GenCompat::TypesVisitor::visitClassDefStart(const ClassDefPtr& p)
                 {
                     out << "public abstract ";
                 }
-                string cb = "Callback_" + name + "_" + opname + " __cb";
+                string cb = "Callback_" + name + "_" + opname + " " + getEscapedParamName(op, "cb");
                 out << "Ice.AsyncResult begin_" << opname << spar << inParams << cb << epar << ';';
 
-
                 out << sp;
                 writeDocCommentAMI(out, op, InParam);
                 out << nl;
@@ -2724,7 +2806,7 @@ Slice::GenCompat::TypesVisitor::visitClassDefStart(const ClassDefPtr& p)
                     out << "public abstract ";
                 }
 
-                out << retS << " end_" << opname << spar << outParams << "Ice.AsyncResult __result" << epar << ';';
+                out << retS << " end_" << opname << spar << outParams << "Ice.AsyncResult result" << epar << ';';
             }
         }
     }
@@ -2873,7 +2955,7 @@ Slice::GenCompat::TypesVisitor::visitClassDefStart(const ClassDefPtr& p)
     if(!p->isInterface() && p->allOperations().size() == 0 && !p->isLocal())
     {
         out << sp;
-        out << nl << "private static class __F implements Ice.ValueFactory";
+        out << nl << "private static class _F implements Ice.ValueFactory";
         out << sb;
         out << nl << "public Ice.Object create(String type)";
         out << sb;
@@ -2881,7 +2963,7 @@ Slice::GenCompat::TypesVisitor::visitClassDefStart(const ClassDefPtr& p)
         out << nl << "return new " << fixKwd(name) << "();";
         out << eb;
         out << eb;
-        out << nl << "private static Ice.ValueFactory _factory = new __F();";
+        out << nl << "private static Ice.ValueFactory _factory = new _F();";
         out << sp;
         out << nl << "public static Ice.ValueFactory" << nl << "ice_factory()";
         out << sb;
@@ -3036,9 +3118,9 @@ Slice::GenCompat::TypesVisitor::visitExceptionStart(const ExceptionPtr& p)
     out << eb;
 
     out << sp;
-    out << nl << "public " << name << "(Throwable __cause)";
+    out << nl << "public " << name << "(Throwable cause)";
     out << sb;
-    out << nl << "super(__cause);";
+    out << nl << "super(cause);";
     writeDataMemberInitializers(out, members, package);
     out << eb;
 
@@ -3132,7 +3214,8 @@ Slice::GenCompat::TypesVisitor::visitExceptionStart(const ExceptionPtr& p)
                 //
                 if(allDataMembers.size() < 254)
                 {
-                    paramDecl.push_back("Throwable __cause");
+                    const string causeParamName = getEscapedParamName(allDataMembers, "cause");
+                    paramDecl.push_back("Throwable " + causeParamName);
                     out << sp << nl << "public " << name << spar;
                     out << paramDecl << epar;
                     out << sb;
@@ -3147,12 +3230,12 @@ Slice::GenCompat::TypesVisitor::visitExceptionStart(const ExceptionPtr& p)
                                 baseParamNames.push_back(fixKwd((*d)->name()));
                             }
                         }
-                        baseParamNames.push_back("__cause");
+                        baseParamNames.push_back(causeParamName);
                         out << baseParamNames << epar << ';';
                     }
                     else
                     {
-                        out << nl << "super(__cause);";
+                        out << nl << "super(" << causeParamName << ");";
                     }
                     for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
                     {
@@ -3210,13 +3293,14 @@ Slice::GenCompat::TypesVisitor::visitExceptionStart(const ExceptionPtr& p)
             //
             if(allDataMembers.size() < 254)
             {
-                paramDecl.push_back("Throwable __cause");
+                const string causeParamName = getEscapedParamName(allDataMembers, "cause");
+                paramDecl.push_back("Throwable " + causeParamName);
                 out << sp << nl << "public " << name << spar;
                 out << paramDecl << epar;
                 out << sb;
                 if(!base)
                 {
-                    out << nl << "super(__cause);";
+                    out << nl << "super(" << causeParamName << ");";
                 }
                 else
                 {
@@ -3227,7 +3311,7 @@ Slice::GenCompat::TypesVisitor::visitExceptionStart(const ExceptionPtr& p)
                     {
                         baseParamNames.push_back(fixKwd((*d)->name()));
                     }
-                    baseParamNames.push_back("__cause");
+                    baseParamNames.push_back(causeParamName);
                     out << baseParamNames << epar << ';';
                 }
                 for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
@@ -3278,24 +3362,24 @@ Slice::GenCompat::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
         if(preserved && !basePreserved)
         {
 
-            out << sp << nl << "public void" << nl << "__write(Ice.OutputStream __os)";
+            out << sp << nl << "public void" << nl << "_write(Ice.OutputStream ostr)";
             out << sb;
-            out << nl << "__os.startException(__slicedData);";
-            out << nl << "__writeImpl(__os);";
-            out << nl << "__os.endException();";
+            out << nl << "ostr.startException(_slicedData);";
+            out << nl << "_writeImpl(ostr);";
+            out << nl << "ostr.endException();";
             out << eb;
 
-            out << sp << nl << "public void" << nl << "__read(Ice.InputStream __is)";
+            out << sp << nl << "public void" << nl << "_read(Ice.InputStream istr)";
             out << sb;
-            out << nl << "__is.startException();";
-            out << nl << "__readImpl(__is);";
-            out << nl << "__slicedData = __is.endException(true);";
+            out << nl << "istr.startException();";
+            out << nl << "_readImpl(istr);";
+            out << nl << "_slicedData = istr.endException(true);";
             out << eb;
         }
 
-        out << sp << nl << "protected void" << nl << "__writeImpl(Ice.OutputStream __os)";
+        out << sp << nl << "protected void" << nl << "_writeImpl(Ice.OutputStream ostr_)";
         out << sb;
-        out << nl << "__os.startSlice(\"" << scoped << "\", -1, " << (!base ? "true" : "false") << ");";
+        out << nl << "ostr_.startSlice(\"" << scoped << "\", -1, " << (!base ? "true" : "false") << ");";
         iter = 0;
         for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
         {
@@ -3308,10 +3392,10 @@ Slice::GenCompat::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
         {
             writeMarshalDataMember(out, package, *d, iter);
         }
-        out << nl << "__os.endSlice();";
+        out << nl << "ostr_.endSlice();";
         if(base)
         {
-            out << nl << "super.__writeImpl(__os);";
+            out << nl << "super._writeImpl(ostr_);";
         }
         out << eb;
 
@@ -3322,9 +3406,9 @@ Slice::GenCompat::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
         {
             writePatcher(out, package, classMembers, optionalMembers);
         }
-        out << sp << nl << "protected void" << nl << "__readImpl(Ice.InputStream __is)";
+        out << sp << nl << "protected void" << nl << "_readImpl(Ice.InputStream istr_)";
         out << sb;
-        out << nl << "__is.startSlice();";
+        out << nl << "istr_.startSlice();";
         iter = 0;
         int patchIter = 0;
         const bool needCustomPatcher = classMembers.size() > 1;
@@ -3339,10 +3423,10 @@ Slice::GenCompat::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
         {
             writeUnmarshalDataMember(out, package, *d, iter, needCustomPatcher, patchIter);
         }
-        out << nl << "__is.endSlice();";
+        out << nl << "istr_.endSlice();";
         if(base)
         {
-            out << nl << "super.__readImpl(__is);";
+            out << nl << "super._readImpl(istr_);";
         }
         out << eb;
 
@@ -3350,7 +3434,7 @@ Slice::GenCompat::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
         {
             if(!base || (base && !base->usesClasses(false)))
             {
-                out << sp << nl << "public boolean" << nl << "__usesClasses()";
+                out << sp << nl << "public boolean" << nl << "_usesClasses()";
                 out << sb;
                 out << nl << "return true;";
                 out << eb;
@@ -3359,7 +3443,7 @@ Slice::GenCompat::TypesVisitor::visitExceptionEnd(const ExceptionPtr& p)
 
         if(preserved && !basePreserved)
         {
-            out << sp << nl << "protected Ice.SlicedData __slicedData;";
+            out << sp << nl << "protected Ice.SlicedData _slicedData;";
         }
     }
 
@@ -3475,12 +3559,12 @@ Slice::GenCompat::TypesVisitor::visitStructEnd(const StructPtr& p)
     out << sb;
     out << nl << "return true;";
     out << eb;
-    out << nl << typeS << " _r = null;";
+    out << nl << typeS << " r = null;";
     out << nl << "if(rhs instanceof " << typeS << ")";
     out << sb;
-    out << nl << "_r = (" << typeS << ")rhs;";
+    out << nl << "r = (" << typeS << ")rhs;";
     out << eb;
-    out << sp << nl << "if(_r != null)";
+    out << sp << nl << "if(r != null)";
     out << sb;
     for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
     {
@@ -3498,7 +3582,7 @@ Slice::GenCompat::TypesVisitor::visitStructEnd(const StructPtr& p)
                 case Builtin::KindFloat:
                 case Builtin::KindDouble:
                 {
-                    out << nl << "if(" << memberName << " != _r." << memberName << ')';
+                    out << nl << "if(this." << memberName << " != r." << memberName << ')';
                     out << sb;
                     out << nl << "return false;";
                     out << eb;
@@ -3511,10 +3595,10 @@ Slice::GenCompat::TypesVisitor::visitStructEnd(const StructPtr& p)
                 case Builtin::KindLocalObject:
                 case Builtin::KindValue:
                 {
-                    out << nl << "if(" << memberName << " != _r." << memberName << ')';
+                    out << nl << "if(this." << memberName << " != r." << memberName << ')';
                     out << sb;
-                    out << nl << "if(" << memberName << " == null || _r." << memberName << " == null || !"
-                        << memberName << ".equals(_r." << memberName << "))";
+                    out << nl << "if(this." << memberName << " == null || r." << memberName << " == null || !this."
+                        << memberName << ".equals(r." << memberName << "))";
                     out << sb;
                     out << nl << "return false;";
                     out << eb;
@@ -3538,10 +3622,10 @@ Slice::GenCompat::TypesVisitor::visitStructEnd(const StructPtr& p)
             {
                 if(hasTypeMetaData(seq, (*d)->getMetaData()))
                 {
-                    out << nl << "if(" << memberName << " != _r." << memberName << ')';
+                    out << nl << "if(this." << memberName << " != r." << memberName << ')';
                     out << sb;
-                    out << nl << "if(" << memberName << " == null || _r." << memberName << " == null || !"
-                        << memberName << ".equals(_r." << memberName << "))";
+                    out << nl << "if(this." << memberName << " == null || r." << memberName << " == null || !this."
+                        << memberName << ".equals(r." << memberName << "))";
                     out << sb;
                     out << nl << "return false;";
                     out << eb;
@@ -3552,7 +3636,7 @@ Slice::GenCompat::TypesVisitor::visitStructEnd(const StructPtr& p)
                     //
                     // Arrays.equals() handles null values.
                     //
-                    out << nl << "if(!java.util.Arrays.equals(" << memberName << ", _r." << memberName << "))";
+                    out << nl << "if(!java.util.Arrays.equals(this." << memberName << ", r." << memberName << "))";
                     out << sb;
                     out << nl << "return false;";
                     out << eb;
@@ -3560,10 +3644,10 @@ Slice::GenCompat::TypesVisitor::visitStructEnd(const StructPtr& p)
             }
             else
             {
-                out << nl << "if(" << memberName << " != _r." << memberName << ')';
+                out << nl << "if(this." << memberName << " != r." << memberName << ')';
                 out << sb;
-                out << nl << "if(" << memberName << " == null || _r." << memberName << " == null || !"
-                    << memberName << ".equals(_r." << memberName << "))";
+                out << nl << "if(this." << memberName << " == null || r." << memberName << " == null || !this."
+                    << memberName << ".equals(r." << memberName << "))";
                 out << sb;
                 out << nl << "return false;";
                 out << eb;
@@ -3578,15 +3662,15 @@ Slice::GenCompat::TypesVisitor::visitStructEnd(const StructPtr& p)
 
     out << sp << nl << "public int" << nl << "hashCode()";
     out << sb;
-    out << nl << "int __h = 5381;";
-    out << nl << "__h = IceInternal.HashUtil.hashAdd(__h, \"" << p->scoped() << "\");";
+    out << nl << "int h_ = 5381;";
+    out << nl << "h_ = IceInternal.HashUtil.hashAdd(h_, \"" << p->scoped() << "\");";
     iter = 0;
     for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
     {
         string memberName = fixKwd((*d)->name());
-        out << nl << "__h = IceInternal.HashUtil.hashAdd(__h, " << memberName << ");";
+        out << nl << "h_ = IceInternal.HashUtil.hashAdd(h_, " << memberName << ");";
     }
-    out << nl << "return __h;";
+    out << nl << "return h_;";
     out << eb;
 
     out << sp << nl << "public " << name << nl << "clone()";
@@ -3605,12 +3689,12 @@ Slice::GenCompat::TypesVisitor::visitStructEnd(const StructPtr& p)
 
     if(!p->isLocal())
     {
-        out << sp << nl << "public void" << nl << "__write(Ice.OutputStream __os)";
+        out << sp << nl << "public void" << nl << "write(Ice.OutputStream ostr)";
         out << sb;
         iter = 0;
         for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
         {
-            writeMarshalDataMember(out, package, *d, iter);
+            writeMarshalDataMember(out, package, *d, iter, true);
         }
         out << eb;
 
@@ -3621,40 +3705,40 @@ Slice::GenCompat::TypesVisitor::visitStructEnd(const StructPtr& p)
             writePatcher(out, package, classMembers, DataMemberList());
         }
 
-        out << sp << nl << "public void" << nl << "__read(Ice.InputStream __is)";
+        out << sp << nl << "public void" << nl << "read(Ice.InputStream istr)";
         out << sb;
         iter = 0;
         int patchIter = 0;
         const bool needCustomPatcher = classMembers.size() > 1;
         for(DataMemberList::const_iterator d = members.begin(); d != members.end(); ++d)
         {
-            writeUnmarshalDataMember(out, package, *d, iter, needCustomPatcher, patchIter);
+            writeUnmarshalDataMember(out, package, *d, iter, needCustomPatcher, patchIter, true);
         }
         out << eb;
 
-        out << sp << nl << "static public void" << nl << "write(Ice.OutputStream __os, " << name << " __v)";
+        out << sp << nl << "static public void" << nl << "write(Ice.OutputStream ostr, " << name << " v)";
         out << sb;
-        out << nl << "if(__v == null)";
+        out << nl << "if(v == null)";
         out << sb;
-        out << nl << "__nullMarshalValue.__write(__os);";
+        out << nl << "_nullMarshalValue.write(ostr);";
         out << eb;
         out << nl << "else";
         out << sb;
-        out << nl << "__v.__write(__os);";
+        out << nl << "v.write(ostr);";
         out << eb;
         out << eb;
 
-        out << sp << nl << "static public " << name << nl << "read(Ice.InputStream __is, " << name << " __v)";
+        out << sp << nl << "static public " << name << nl << "read(Ice.InputStream istr, " << name << " v)";
         out << sb;
-        out << nl << "if(__v == null)";
+        out << nl << "if(v == null)";
         out << sb;
-        out << nl << " __v = new " << name << "();";
+        out << nl << " v = new " << name << "();";
         out << eb;
-        out << nl << "__v.__read(__is);";
-        out << nl << "return __v;";
+        out << nl << "v.read(istr);";
+        out << nl << "return v;";
         out << eb;
 
-        out << nl << nl << "private static final " << name << " __nullMarshalValue = new " << name << "();";
+        out << nl << nl << "private static final " << name << " _nullMarshalValue = new " << name << "();";
     }
 
     out << sp << nl << "public static final long serialVersionUID = ";
@@ -3735,7 +3819,7 @@ Slice::GenCompat::TypesVisitor::visitDataMember(const DataMemberPtr& p)
 
     if(optional)
     {
-        out << nl << "private boolean __has_" << p->name() << ';';
+        out << nl << "private boolean _" << p->name() << ';';
     }
 
     //
@@ -3781,7 +3865,7 @@ Slice::GenCompat::TypesVisitor::visitDataMember(const DataMemberPtr& p)
         out << sb;
         if(optional)
         {
-            out << nl << "if(!__has_" << p->name() << ')';
+            out << nl << "if(!_" << p->name() << ')';
             out << sb;
             out << nl << "throw new java.lang.IllegalStateException(\"" << name << " is not set\");";
             out << eb;
@@ -3795,13 +3879,13 @@ Slice::GenCompat::TypesVisitor::visitDataMember(const DataMemberPtr& p)
         out << sp;
         writeDocComment(out, p, deprecateReason);
         out << nl << "public void"
-            << nl << "set" << capName << '(' << s << " _" << name << ')';
+            << nl << "set" << capName << '(' << s << " " << name << ')';
         out << sb;
         if(optional)
         {
-            out << nl << "__has_" << p->name() << " = true;";
+            out << nl << "_" << p->name() << " = true;";
         }
-        out << nl << name << " = _" << name << ';';
+        out << nl << "this." << name << " = " << name << ';';
         out << eb;
 
         //
@@ -3814,7 +3898,7 @@ Slice::GenCompat::TypesVisitor::visitDataMember(const DataMemberPtr& p)
             out << nl << "public boolean"
                 << nl << "has" << capName << "()";
             out << sb;
-            out << nl << "return __has_" << p->name() << ';';
+            out << nl << "return _" << p->name() << ';';
             out << eb;
 
             out << sp;
@@ -3822,7 +3906,7 @@ Slice::GenCompat::TypesVisitor::visitDataMember(const DataMemberPtr& p)
             out << nl << "public void"
                 << nl << "clear" << capName << "()";
             out << sb;
-            out << nl << "__has_" << p->name() << " = false;";
+            out << nl << "_" << p->name() << " = false;";
             out << eb;
 
             const string optType = typeToString(type, TypeModeMember, getPackage(contained), metaData, true, true);
@@ -3830,16 +3914,16 @@ Slice::GenCompat::TypesVisitor::visitDataMember(const DataMemberPtr& p)
             out << sp;
             writeDocComment(out, p, deprecateReason);
             out << nl << "public void"
-                << nl << "optional" << capName << '(' << optType << " __v)";
+                << nl << "optional" << capName << '(' << optType << " v)";
             out << sb;
-            out << nl << "if(__v == null || !__v.isSet())";
+            out << nl << "if(v == null || !v.isSet())";
             out << sb;
-            out << nl << "__has_" << p->name() << " = false;";
+            out << nl << "_" << p->name() << " = false;";
             out << eb;
             out << nl << "else";
             out << sb;
-            out << nl << "__has_" << p->name() << " = true;";
-            out << nl << name << " = __v.get();";
+            out << nl << "_" << p->name() << " = true;";
+            out << nl << name << " = v.get();";
             out << eb;
             out << eb;
 
@@ -3848,7 +3932,7 @@ Slice::GenCompat::TypesVisitor::visitDataMember(const DataMemberPtr& p)
             out << nl << "public " << optType
                 << nl << "optional" << capName << "()";
             out << sb;
-            out << nl << "if(__has_" << p->name() << ')';
+            out << nl << "if(_" << p->name() << ')';
             out << sb;
             out << nl << "return new " << optType << '(' << name << ");";
             out << eb;
@@ -3881,7 +3965,7 @@ Slice::GenCompat::TypesVisitor::visitDataMember(const DataMemberPtr& p)
             out << sb;
             if(optional)
             {
-                out << nl << "if(!__has_" << p->name() << ')';
+                out << nl << "if(!_" << p->name() << ')';
                 out << sb;
                 out << nl << "throw new java.lang.IllegalStateException(\"" << name << " is not set\");";
                 out << eb;
@@ -3918,16 +4002,16 @@ Slice::GenCompat::TypesVisitor::visitDataMember(const DataMemberPtr& p)
                     out << nl << " **/";
                 }
                 out << nl << "public " << elem;
-                out << nl << "get" << capName << "(int _index)";
+                out << nl << "get" << capName << "(int index)";
                 out << sb;
                 if(optional)
                 {
-                    out << nl << "if(!__has_" << p->name() << ')';
+                    out << nl << "if(!_" << p->name() << ')';
                     out << sb;
                     out << nl << "throw new java.lang.IllegalStateException(\"" << name << " is not set\");";
                     out << eb;
                 }
-                out << nl << "return " << name << "[_index];";
+                out << nl << "return this." << name << "[index];";
                 out << eb;
 
                 //
@@ -3941,16 +4025,16 @@ Slice::GenCompat::TypesVisitor::visitDataMember(const DataMemberPtr& p)
                     out << nl << " **/";
                 }
                 out << nl << "public void";
-                out << nl << "set" << capName << "(int _index, " << elem << " _val)";
+                out << nl << "set" << capName << "(int index, " << elem << " val)";
                 out << sb;
                 if(optional)
                 {
-                    out << nl << "if(!__has_" << p->name() << ')';
+                    out << nl << "if(!_" << p->name() << ')';
                     out << sb;
                     out << nl << "throw new java.lang.IllegalStateException(\"" << name << " is not set\");";
                     out << eb;
                 }
-                out << nl << name << "[_index] = _val;";
+                out << nl << "this." << name << "[index] = val;";
                 out << eb;
             }
         }
@@ -3991,16 +4075,14 @@ Slice::GenCompat::TypesVisitor::visitEnum(const EnumPtr& p)
     }
     out << ';';
 
-    out << sp << nl << "public int"
-        << nl << "value()";
+    out << sp << nl << "public int value()";
     out << sb;
-    out << nl << "return __value;";
+    out << nl << "return _value;";
     out << eb;
 
-    out << sp << nl << "public static " << name
-        << nl << "valueOf(int __v)";
+    out << sp << nl << "public static " << name << " valueOf(int v)";
     out << sb;
-    out << nl << "switch(__v)";
+    out << nl << "switch(v)";
     out << sb;
     out.dec();
     for(EnumeratorList::const_iterator en = enumerators.begin(); en != enumerators.end(); ++en)
@@ -4015,51 +4097,49 @@ Slice::GenCompat::TypesVisitor::visitEnum(const EnumPtr& p)
     out << nl << "return null;";
     out << eb;
 
-    out << sp << nl << "private"
-        << nl << name << "(int __v)";
+    out << sp << nl << "private " << name << "(int v)";
     out << sb;
-    out << nl << "__value = __v;";
+    out << nl << "_value = v;";
     out << eb;
 
     if(!p->isLocal())
     {
-        out << sp << nl << "public void" << nl << "__write(Ice.OutputStream __os)";
+        out << sp << nl << "public void write(Ice.OutputStream ostr)";
         out << sb;
-        out << nl << "__os.writeEnum(value(), " << p->maxValue() << ");";
+        out << nl << "ostr.writeEnum(_value, " << p->maxValue() << ");";
         out << eb;
 
-        out << sp << nl << "public static void" << nl << "write(Ice.OutputStream __os, " << name << " __v)";
+        out << sp << nl << "public static void write(Ice.OutputStream ostr, " << name << " v)";
         out << sb;
-        out << nl << "if(__v == null)";
+        out << nl << "if(v == null)";
         out << sb;
         string firstEnum = fixKwd(enumerators.front()->name());
-        out << nl << "__os.writeEnum(" << absolute << '.' << firstEnum << ".value(), " << p->maxValue() << ");";
+        out << nl << "ostr.writeEnum(" << absolute << '.' << firstEnum << ".value(), " << p->maxValue() << ");";
         out << eb;
         out << nl << "else";
         out << sb;
-        out << nl << "__os.writeEnum(__v.value(), " << p->maxValue() << ");";
+        out << nl << "ostr.writeEnum(v.value(), " << p->maxValue() << ");";
         out << eb;
         out << eb;
 
-        out << sp << nl << "public static " << name << nl << "read(Ice.InputStream __is)";
+        out << sp << nl << "public static " << name << " read(Ice.InputStream istr)";
         out << sb;
-        out << nl << "int __v = __is.readEnum(" << p->maxValue() << ");";
-        out << nl << "return __validate(__v);";
+        out << nl << "int v = istr.readEnum(" << p->maxValue() << ");";
+        out << nl << "return validate(v);";
         out << eb;
 
-        out << sp << nl << "private static " << name
-            << nl << "__validate(int __v)";
+        out << sp << nl << "private static " << name << " validate(int v)";
         out << sb;
-        out << nl << "final " << name << " __e = valueOf(__v);";
-        out << nl << "if(__e == null)";
+        out << nl << "final " << name << " e = valueOf(v);";
+        out << nl << "if(e == null)";
         out << sb;
-        out << nl << "throw new Ice.MarshalException(\"enumerator value \" + __v + \" is out of range\");";
+        out << nl << "throw new Ice.MarshalException(\"enumerator value \" + v + \" is out of range\");";
         out << eb;
-        out << nl << "return __e;";
+        out << nl << "return e;";
         out << eb;
     }
 
-    out << sp << nl << "private final int __value;";
+    out << sp << nl << "private final int _value;";
 
     out << eb;
     close();
@@ -4325,8 +4405,8 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
 
     out << sb;
 
-    string contextParam = "java.util.Map<String, String> __ctx";
-    string explicitContextParam = "boolean __explicitCtx";
+    string contextParam = "java.util.Map<String, String> context";
+    string explicitContextParam = "boolean explicitCtx";
 
     OperationList ops = p->allOperations();
     for(OperationList::iterator r = ops.begin(); r != ops.end(); ++r)
@@ -4336,7 +4416,7 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
         const ClassDefPtr cl = ClassDefPtr::dynamicCast(container);
 
         out << sp;
-        out << nl << "private static final String __" << op->name() << "_name = \"" << op->name() << "\";";
+        out << nl << "private static final String _" << op->name() << "_name = \"" << op->name() << "\";";
 
         //
         // Use the optional mapping by default.
@@ -4364,22 +4444,22 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
         const string retS = typeToString(ret, TypeModeReturn, package, op->getMetaData(), true, op->returnIsOptional());
 
         out << sp;
-        out << nl << "public " << retS << " end_" << op->name() << spar << outParams << "Ice.AsyncResult __iresult"
+        out << nl << "public " << retS << " end_" << op->name() << spar << outParams << "Ice.AsyncResult iresult"
             << epar;
         writeThrowsClause(package, throws);
         out << sb;
         if(op->returnsData())
         {
-            out << nl << "IceInternal.OutgoingAsync __result = IceInternal.OutgoingAsync.check(__iresult, this, __"
+            out << nl << "IceInternal.OutgoingAsync result_ = IceInternal.OutgoingAsync.check(iresult, this, _"
                 << op->name() << "_name);";
             out << nl << "try";
             out << sb;
 
-            out << nl << "if(!__result.__wait())";
+            out << nl << "if(!result_.waitForResponseOrUserEx())";
             out << sb;
             out << nl << "try";
             out << sb;
-            out << nl << "__result.throwUserException();";
+            out << nl << "result_.throwUserException();";
             out << eb;
             //
             // Arrange exceptions into most-derived to least-derived order. If we don't
@@ -4394,20 +4474,20 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
 #endif
             for(ExceptionList::const_iterator eli = throws.begin(); eli != throws.end(); ++eli)
             {
-                out << nl << "catch(" << getAbsolute(*eli, package) << " __ex)";
+                out << nl << "catch(" << getAbsolute(*eli, package) << " ex_)";
                 out << sb;
-                out << nl << "throw __ex;";
+                out << nl << "throw ex_;";
                 out << eb;
             }
-            out << nl << "catch(Ice.UserException __ex)";
+            out << nl << "catch(Ice.UserException ex_)";
             out << sb;
-            out << nl << "throw new Ice.UnknownUserException(__ex.ice_id(), __ex);";
+            out << nl << "throw new Ice.UnknownUserException(ex_.ice_id(), ex_);";
             out << eb;
             out << eb;
 
             if(ret || !outParams.empty())
             {
-                out << nl << "Ice.InputStream __is = __result.startReadParams();";
+                out << nl << "Ice.InputStream istr_ = result_.startReadParams();";
                 const ParamDeclList paramList = op->parameters();
                 ParamDeclList pl;
                 for(ParamDeclList::const_iterator pli = paramList.begin(); pli != paramList.end(); ++pli)
@@ -4417,16 +4497,16 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
                         pl.push_back(*pli);
                     }
                 }
-                writeMarshalUnmarshalParams(out, package, pl, op, iter, false, true);
+                writeMarshalUnmarshalParams(out, package, pl, op, iter, false, true, false);
                 if(op->returnsClasses(false))
                 {
-                    out << nl << "__is.readPendingValues();";
+                    out << nl << "istr_.readPendingValues();";
                 }
-                out << nl << "__result.endReadParams();";
+                out << nl << "result_.endReadParams();";
             }
             else
             {
-                out << nl << "__result.readEmptyParams();";
+                out << nl << "result_.readEmptyParams();";
             }
 
             if(ret)
@@ -4435,32 +4515,32 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
                 if(!op->returnIsOptional() &&
                    ((builtin && builtin->kind() == Builtin::KindObject) || ClassDeclPtr::dynamicCast(ret)))
                 {
-                    out << nl << "return __ret.value;";
+                    out << nl << "return ret_.value;";
                 }
                 else
                 {
-                    out << nl << "return __ret;";
+                    out << nl << "return ret_;";
                 }
             }
 
             out << eb;
             out << nl << "finally";
             out << sb;
-            out << nl << "if(__result != null)";
+            out << nl << "if(result_ != null)";
             out << sb;
-            out << nl << "__result.cacheMessageBuffers();";
+            out << nl << "result_.cacheMessageBuffers();";
             out << eb;
             out << eb;
         }
         else
         {
-            out << nl << "__end(__iresult, __" << op->name() << "_name);";
+            out << nl << "_end(iresult, _" << op->name() << "_name);";
         }
         out << eb;
 
         //
-        // The async callbacks implementation of __completed method delegate to the static
-        // __<op-name>_completed method implemented bellow.
+        // The async callbacks implementation of _iceCompleted method delegate to the static
+        // _iceI_<op-name>_completed method implemented bellow.
         //
         if(op->returnsData())
         {
@@ -4474,69 +4554,69 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
                 }
             }
 
-            out << sp << nl << "static public void __" << op->name() << "_completed("
-                << getAsyncCallbackInterface(op, package) << " __cb, Ice.AsyncResult __result)";
+            out << sp << nl << "static public void _iceI_" << op->name() << "_completed("
+                << getAsyncCallbackInterface(op, package) << " cb, Ice.AsyncResult result)";
             out << sb;
-            out << nl << getAbsolute(cl, "", "", "Prx") << " __proxy = ("
-                << getAbsolute(cl, "", "", "Prx") << ")__result.getProxy();";
+            out << nl << getAbsolute(cl, "", "", "Prx") << " _proxy = ("
+                << getAbsolute(cl, "", "", "Prx") << ")result.getProxy();";
 
             TypePtr ret = op->returnType();
             if(ret)
             {
                 out << nl << typeToString(ret, TypeModeIn, package, op->getMetaData(), true,
                                             op->returnIsOptional())
-                    << " __ret = " << (op->returnIsOptional() ? "null" : initValue(ret)) << ';';
+                    << " ret = " << (op->returnIsOptional() ? "null" : initValue(ret)) << ';';
             }
             for(ParamDeclList::const_iterator pli = outParams.begin(); pli != outParams.end(); ++pli)
             {
                 string ts = typeToString((*pli)->type(), TypeModeOut, package, (*pli)->getMetaData(), true,
                                             (*pli)->optional());
-                out << nl << ts << ' ' << fixKwd((*pli)->name()) << " = new " << ts << "();";
+                out << nl << ts << " iceP_" << (*pli)->name() << " = new " << ts << "();";
             }
             out << nl << "try";
             out << sb;
             out << nl;
             if(op->returnType())
             {
-                out << "__ret = ";
+                out << "ret = ";
             }
-            out << "__proxy.end_" << op->name() << spar << getInOutArgs(op, OutParam) << "__result" << epar
+            out << "_proxy.end_" << op->name() << spar << getInOutArgs(op, OutParam, true) << "result" << epar
                 << ';';
 
             out << eb;
             if(!throws.empty())
             {
-                out << nl << "catch(Ice.UserException __ex)";
+                out << nl << "catch(Ice.UserException ex)";
                 out << sb;
-                out << nl << "__cb.exception(__ex);";
+                out << nl << "cb.exception(ex);";
                 out << nl << "return;";
                 out << eb;
             }
-            out << nl << "catch(Ice.LocalException __ex)";
+            out << nl << "catch(Ice.LocalException ex)";
             out << sb;
-            out << nl << "__cb.exception(__ex);";
+            out << nl << "cb.exception(ex);";
             out << nl << "return;";
             out << eb;
-            out << nl << "catch(Ice.SystemException __ex)";
+            out << nl << "catch(Ice.SystemException ex)";
             out << sb;
-            out << nl << "__cb.exception(__ex);";
+            out << nl << "cb.exception(ex);";
             out << nl << "return;";
             out << eb;
 
-            out << nl << "__cb.response" << spar;
+            out << nl << "cb.response" << spar;
             if(op->returnType())
             {
-                out << "__ret";
+                out << "ret";
             }
             for(ParamDeclList::const_iterator pli = outParams.begin(); pli != outParams.end(); ++pli)
             {
                 if((*pli)->optional())
                 {
-                    out << fixKwd((*pli)->name());
+                    out << "iceP_" + (*pli)->name();
                 }
                 else
                 {
-                    out << fixKwd((*pli)->name()) + ".value";
+                    out << "iceP_" + (*pli)->name() + ".value";
                 }
             }
             out << epar << ';';
@@ -4549,11 +4629,11 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
     writeDocComment(out, "",
                     "Contacts the remote server to verify that the object implements this type.\n"
                     "Raises a local exception if a communication error occurs.\n"
-                    "@param __obj The untyped proxy.\n"
+                    "@param obj The untyped proxy.\n"
                     "@return A proxy for this type, or null if the object does not support this type.");
-    out << nl << "public static " << name << "Prx checkedCast(Ice.ObjectPrx __obj)";
+    out << nl << "public static " << name << "Prx checkedCast(Ice.ObjectPrx obj)";
     out << sb;
-    out << nl << "return checkedCastImpl(__obj, ice_staticId(), " << name << "Prx.class, "
+    out << nl << "return checkedCastImpl(obj, ice_staticId(), " << name << "Prx.class, "
         << name << "PrxHelper.class);";
     out << eb;
 
@@ -4561,12 +4641,12 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
     writeDocComment(out, "",
                     "Contacts the remote server to verify that the object implements this type.\n"
                     "Raises a local exception if a communication error occurs.\n"
-                    "@param __obj The untyped proxy.\n"
-                    "@param __ctx The Context map to send with the invocation.\n"
+                    "@param obj The untyped proxy.\n"
+                    "@param context The Context map to send with the invocation.\n"
                     "@return A proxy for this type, or null if the object does not support this type.");
-    out << nl << "public static " << name << "Prx checkedCast(Ice.ObjectPrx __obj, " << contextParam << ')';
+    out << nl << "public static " << name << "Prx checkedCast(Ice.ObjectPrx obj, " << contextParam << ')';
     out << sb;
-    out << nl << "return checkedCastImpl(__obj, __ctx, ice_staticId(), " << name
+    out << nl << "return checkedCastImpl(obj, context, ice_staticId(), " << name
         << "Prx.class, " << name << "PrxHelper.class);";
     out << eb;
 
@@ -4574,12 +4654,12 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
     writeDocComment(out, "",
                     "Contacts the remote server to verify that a facet of the object implements this type.\n"
                     "Raises a local exception if a communication error occurs.\n"
-                    "@param __obj The untyped proxy.\n"
-                    "@param __facet The name of the desired facet.\n"
+                    "@param obj The untyped proxy.\n"
+                    "@param facet The name of the desired facet.\n"
                     "@return A proxy for this type, or null if the object does not support this type.");
-    out << nl << "public static " << name << "Prx checkedCast(Ice.ObjectPrx __obj, String __facet)";
+    out << nl << "public static " << name << "Prx checkedCast(Ice.ObjectPrx obj, String facet)";
     out << sb;
-    out << nl << "return checkedCastImpl(__obj, __facet, ice_staticId(), " << name
+    out << nl << "return checkedCastImpl(obj, facet, ice_staticId(), " << name
         << "Prx.class, " << name << "PrxHelper.class);";
     out << eb;
 
@@ -4587,37 +4667,37 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
     writeDocComment(out, "",
                     "Contacts the remote server to verify that a facet of the object implements this type.\n"
                     "Raises a local exception if a communication error occurs.\n"
-                    "@param __obj The untyped proxy.\n"
-                    "@param __facet The name of the desired facet.\n"
-                    "@param __ctx The Context map to send with the invocation.\n"
+                    "@param obj The untyped proxy.\n"
+                    "@param facet The name of the desired facet.\n"
+                    "@param context The Context map to send with the invocation.\n"
                     "@return A proxy for this type, or null if the object does not support this type.");
-    out << nl << "public static " << name << "Prx checkedCast(Ice.ObjectPrx __obj, String __facet, "
+    out << nl << "public static " << name << "Prx checkedCast(Ice.ObjectPrx obj, String facet, "
         << contextParam << ')';
     out << sb;
-    out << nl << "return checkedCastImpl(__obj, __facet, __ctx, ice_staticId(), " << name
+    out << nl << "return checkedCastImpl(obj, facet, context, ice_staticId(), " << name
         << "Prx.class, " << name << "PrxHelper.class);";
     out << eb;
 
     out << sp;
     writeDocComment(out, "",
                     "Downcasts the given proxy to this type without contacting the remote server.\n"
-                    "@param __obj The untyped proxy.\n"
+                    "@param obj The untyped proxy.\n"
                     "@return A proxy for this type.");
-    out << nl << "public static " << name << "Prx uncheckedCast(Ice.ObjectPrx __obj)";
+    out << nl << "public static " << name << "Prx uncheckedCast(Ice.ObjectPrx obj)";
     out << sb;
-    out << nl << "return uncheckedCastImpl(__obj, " << name << "Prx.class, " << name
+    out << nl << "return uncheckedCastImpl(obj, " << name << "Prx.class, " << name
         << "PrxHelper.class);";
     out << eb;
 
     out << sp;
     writeDocComment(out, "",
                     "Downcasts the given proxy to this type without contacting the remote server.\n"
-                    "@param __obj The untyped proxy.\n"
-                    "@param __facet The name of the desired facet.\n"
+                    "@param obj The untyped proxy.\n"
+                    "@param facet The name of the desired facet.\n"
                     "@return A proxy for this type.");
-    out << nl << "public static " << name << "Prx uncheckedCast(Ice.ObjectPrx __obj, String __facet)";
+    out << nl << "public static " << name << "Prx uncheckedCast(Ice.ObjectPrx obj, String facet)";
     out << sb;
-    out << nl << "return uncheckedCastImpl(__obj, __facet, " << name << "Prx.class, " << name
+    out << nl << "return uncheckedCastImpl(obj, facet, " << name << "Prx.class, " << name
         << "PrxHelper.class);";
     out << eb;
 
@@ -4635,7 +4715,7 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
     assert(scopedIter != ids.end());
     StringList::difference_type scopedPos = ::IceUtilInternal::distance(firstIter, scopedIter);
 
-    out << sp << nl << "public static final String[] __ids =";
+    out << sp << nl << "private static final String[] _ids =";
     out << sb;
 
     for(StringList::const_iterator q = ids.begin(); q != ids.end();)
@@ -4655,21 +4735,21 @@ Slice::GenCompat::HelperVisitor::visitClassDefStart(const ClassDefPtr& p)
                     "@return The Slice type ID.");
     out << nl << "public static String ice_staticId()";
     out << sb;
-    out << nl << "return __ids[" << scopedPos << "];";
+    out << nl << "return _ids[" << scopedPos << "];";
     out << eb;
 
-    out << sp << nl << "public static void write(Ice.OutputStream __os, " << name << "Prx v)";
+    out << sp << nl << "public static void write(Ice.OutputStream ostr, " << name << "Prx v)";
     out << sb;
-    out << nl << "__os.writeProxy(v);";
+    out << nl << "ostr.writeProxy(v);";
     out << eb;
 
-    out << sp << nl << "public static " << name << "Prx read(Ice.InputStream __is)";
+    out << sp << nl << "public static " << name << "Prx read(Ice.InputStream istr)";
     out << sb;
-    out << nl << "Ice.ObjectPrx proxy = __is.readProxy();";
+    out << nl << "Ice.ObjectPrx proxy = istr.readProxy();";
     out << nl << "if(proxy != null)";
     out << sb;
     out << nl << name << "PrxHelper result = new " << name << "PrxHelper();";
-    out << nl << "result.__copyFrom(proxy);";
+    out << nl << "result._copyFrom(proxy);";
     out << nl << "return result;";
     out << eb;
     out << nl << "return null;";
@@ -4776,10 +4856,10 @@ Slice::GenCompat::HelperVisitor::visitSequence(const SequencePtr& p)
     out << sp << nl << "public final class " << name << "Helper";
     out << sb;
 
-    out << nl << "public static void" << nl << "write(Ice.OutputStream __os, " << typeS << " __v)";
+    out << nl << "public static void" << nl << "write(Ice.OutputStream ostr, " << typeS << " v)";
     out << sb;
     iter = 0;
-    writeSequenceMarshalUnmarshalCode(out, package, p, "__v", true, iter, false);
+    writeSequenceMarshalUnmarshalCode(out, package, p, "v", true, iter, false);
     out << eb;
 
     out << sp;
@@ -4787,12 +4867,12 @@ Slice::GenCompat::HelperVisitor::visitSequence(const SequencePtr& p)
     {
         out << nl << "@SuppressWarnings(\"unchecked\")";
     }
-    out << nl << "public static " << typeS << nl << "read(Ice.InputStream __is)";
+    out << nl << "public static " << typeS << nl << "read(Ice.InputStream istr)";
     out << sb;
-    out << nl << typeS << " __v;";
+    out << nl << typeS << " v;";
     iter = 0;
-    writeSequenceMarshalUnmarshalCode(out, package, p, "__v", false, iter, false);
-    out << nl << "return __v;";
+    writeSequenceMarshalUnmarshalCode(out, package, p, "v", false, iter, false);
+    out << nl << "return v;";
     out << eb;
 
     out << eb;
@@ -4828,19 +4908,19 @@ Slice::GenCompat::HelperVisitor::visitDictionary(const DictionaryPtr& p)
     out << sp << nl << "public final class " << name << "Helper";
     out << sb;
 
-    out << nl << "public static void" << nl << "write(Ice.OutputStream __os, " << formalType << " __v)";
+    out << nl << "public static void" << nl << "write(Ice.OutputStream ostr, " << formalType << " v)";
     out << sb;
     iter = 0;
-    writeDictionaryMarshalUnmarshalCode(out, package, p, "__v", true, iter, false);
+    writeDictionaryMarshalUnmarshalCode(out, package, p, "v", true, iter, false);
     out << eb;
 
     out << sp << nl << "public static " << formalType
-        << nl << "read(Ice.InputStream __is)";
+        << nl << "read(Ice.InputStream istr)";
     out << sb;
-    out << nl << formalType << " __v;";
+    out << nl << formalType << " v;";
     iter = 0;
-    writeDictionaryMarshalUnmarshalCode(out, package, p, "__v", false, iter, false);
-    out << nl << "return __v;";
+    writeDictionaryMarshalUnmarshalCode(out, package, p, "v", false, iter, false);
+    out << nl << "return v;";
     out << eb;
 
     out << eb;
@@ -4849,13 +4929,15 @@ Slice::GenCompat::HelperVisitor::visitDictionary(const DictionaryPtr& p)
 
 void
 Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const string& package, const OperationPtr& op,
-                                          bool optionalMapping)
+                                                bool optionalMapping)
 {
     const string name = p->name();
     Output& out = output();
 
-    const string contextParam = "java.util.Map<String, String> __ctx";
-    const string explicitContextParam = "boolean __explicitCtx";
+    const string contextParamName = getEscapedParamName(op, "context");
+    const string contextParam = "java.util.Map<String, String> " + contextParamName;
+    const string contextParamInternal = "java.util.Map<String, String> context";
+    const string explicitContextParam = "boolean explicitCtx";
 
     const ContainerPtr container = op->container();
     const ClassDefPtr cl = ClassDefPtr::dynamicCast(container);
@@ -4864,6 +4946,7 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
     const string retS = typeToString(ret, TypeModeReturn, package, op->getMetaData(), true, op->returnIsOptional());
 
     vector<string> params = getParamsProxy(op, package, false, optionalMapping);
+    vector<string> paramsInternal = getParamsProxy(op, package, false, optionalMapping, true);
     vector<string> args = getArgs(op);
 
     ParamDeclList inParams;
@@ -4897,7 +4980,7 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
     {
         out << "return ";
     }
-    out << opName << spar << args << "null" << "false" << epar << ';';
+    out << "_iceI_" << op->name() << spar << args << "null" << "false" << epar << ';';
     out << eb;
 
     out << sp << nl << "public " << retS << ' ' << opName << spar << params << contextParam << epar;
@@ -4908,11 +4991,11 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
     {
         out << "return ";
     }
-    out << opName << spar << args << "__ctx" << "true" << epar << ';';
+    out << "_iceI_" << op->name() << spar << args << contextParamName << "true" << epar << ';';
     out << eb;
 
     out << sp;
-    out << nl << "private " << retS << ' ' << opName << spar << params << contextParam
+    out << nl << "private " << retS << " _iceI_" << op->name() << spar << paramsInternal << contextParamInternal
         << explicitContextParam << epar;
     writeThrowsClause(package, throws);
     out << sb;
@@ -4920,7 +5003,7 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
     // This code replaces the synchronous calls with chained AMI calls.
     if(op->returnsData())
     {
-        out << nl << "__checkTwowayOnly(__" << op->name() << "_name);";
+        out << nl << "_checkTwowayOnly(_" << op->name() << "_name);";
     }
 
     if(ret)
@@ -4933,21 +5016,21 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
     }
 
     out << "end_" << op->name() << "(";
-    vector<string> inOutArgs = getInOutArgs(op, OutParam);
+    vector<string> inOutArgs = getInOutArgs(op, OutParam, true);
     if(!inOutArgs.empty()) {
         for(vector<string>::const_iterator p = inOutArgs.begin(); p != inOutArgs.end(); ++p) {
             out << *p << ", ";
         }
     }
-    vector<string> inArgs = getInOutArgs(op, InParam);
-    out << "begin_" << op->name() << "(";
+    vector<string> inArgs = getInOutArgs(op, InParam, true);
+    out << "_iceI_begin_" << op->name() << "(";
     if(!inArgs.empty())
     {
         for(vector<string>::const_iterator p = inArgs.begin(); p != inArgs.end(); ++p) {
             out << *p << ", ";
         }
     }
-    out << "__ctx, __explicitCtx, true, null));";
+    out << "context, explicitCtx, true, null));";
     out << eb;
 
     {
@@ -4956,7 +5039,8 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
         //
         vector<string> inParams = getInOutParams(op, package, InParam, true, optionalMapping);
         vector<string> inArgs = getInOutArgs(op, InParam);
-        const string callbackParam = "Ice.Callback __cb";
+        const string callbackParamName = getEscapedParamName(op, "cb");
+        const string callbackParam = "Ice.Callback " + callbackParamName;
         const ParamDeclList paramList = op->parameters();
         int iter;
 
@@ -4965,26 +5049,26 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
         //
         out << sp << nl << "public Ice.AsyncResult begin_" << op->name() << spar << inParams << epar;
         out << sb;
-        out << nl << "return begin_" << op->name() << spar << inArgs << "null" << "false" << "false" << "null" << epar
+        out << nl << "return _iceI_begin_" << op->name() << spar << inArgs << "null" << "false" << "false" << "null" << epar
             << ';';
         out << eb;
 
         out << sp << nl << "public Ice.AsyncResult begin_" << op->name() << spar << inParams << contextParam << epar;
         out << sb;
-        out << nl << "return begin_" << op->name() << spar << inArgs << "__ctx" << "true" << "false" << "null" << epar
+        out << nl << "return _iceI_begin_" << op->name() << spar << inArgs << contextParamName << "true" << "false" << "null" << epar
             << ';';
         out << eb;
 
         out << sp << nl << "public Ice.AsyncResult begin_" << op->name() << spar << inParams << callbackParam << epar;
         out << sb;
-        out << nl << "return begin_" << op->name() << spar << inArgs << "null" << "false" << "false" << "__cb" << epar
+        out << nl << "return _iceI_begin_" << op->name() << spar << inArgs << "null" << "false" << "false" << callbackParamName << epar
             << ';';
         out << eb;
 
         out << sp << nl << "public Ice.AsyncResult begin_" << op->name() << spar << inParams << contextParam
             << callbackParam << epar;
         out << sb;
-        out << nl << "return begin_" << op->name() << spar << inArgs << "__ctx" << "true" << "false" << "__cb" << epar
+        out << nl << "return _iceI_begin_" << op->name() << spar << inArgs << contextParamName << "true" << "false" << callbackParamName << epar
             << ';';
         out << eb;
 
@@ -5000,19 +5084,19 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
         ContainerPtr container = op->container();
         ClassDefPtr cl = ClassDefPtr::dynamicCast(container);
         string opClassName = getAbsolute(cl, package, "Callback_", '_' + op->name());
-        typeSafeCallbackParam = opClassName + " __cb";
+        typeSafeCallbackParam = opClassName + " " + getEscapedParamName(op, "cb");
 
         out << sp << nl << "public Ice.AsyncResult begin_" << op->name() << spar << inParams << typeSafeCallbackParam
             << epar;
         out << sb;
-        out << nl << "return begin_" << op->name() << spar << inArgs << "null" << "false" << "false" << "__cb" << epar
+        out << nl << "return _iceI_begin_" << op->name() << spar << inArgs << "null" << "false" << "false" << callbackParamName << epar
             << ';';
         out << eb;
 
         out << sp << nl << "public Ice.AsyncResult begin_" << op->name() << spar << inParams << contextParam
             << typeSafeCallbackParam << epar;
         out << sb;
-        out << nl << "return begin_" << op->name() << spar << inArgs << "__ctx" << "true" << "false" << "__cb" << epar
+        out << nl << "return _iceI_begin_" << op->name() << spar << inArgs << contextParamName << "true" << "false" << callbackParamName << epar
             << ';';
         out << eb;
 
@@ -5023,14 +5107,14 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
         out << nl << "public Ice.AsyncResult begin_" << op->name();
         writeParamList(out, getParamsAsyncLambda(op, package, false, false, optionalMapping));
         out << sb;
-        out << nl << "return begin_" << op->name() << spar << getArgsAsyncLambda(op, package) << epar << ';';
+        out << nl << "return _iceI_begin_" << op->name() << spar << getArgsAsyncLambda(op, package) << epar << ';';
         out << eb;
 
         out << sp;
         out << nl << "public Ice.AsyncResult begin_" << op->name();
         writeParamList(out, getParamsAsyncLambda(op, package, false, true, optionalMapping));
         out << sb;
-        out << nl << "return begin_" << op->name() << spar << getArgsAsyncLambda(op, package, false, true) << epar
+        out << nl << "return _iceI_begin_" << op->name() << spar << getArgsAsyncLambda(op, package, false, true) << epar
             << ';';
         out << eb;
 
@@ -5038,26 +5122,26 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
         out << nl << "public Ice.AsyncResult begin_" << op->name();
         writeParamList(out, getParamsAsyncLambda(op, package, true, false, optionalMapping));
         out << sb;
-        out << nl << "return begin_" << op->name() << spar << getArgsAsyncLambda(op, package, true) << epar << ';';
+        out << nl << "return _iceI_begin_" << op->name() << spar << getArgsAsyncLambda(op, package, true) << epar << ';';
         out << eb;
 
         out << sp;
         out << nl << "public Ice.AsyncResult begin_" << op->name();
         writeParamList(out, getParamsAsyncLambda(op, package, true, true, optionalMapping));
         out << sb;
-        out << nl << "return begin_" << op->name() << spar << getArgsAsyncLambda(op, package, true, true) << epar
+        out << nl << "return _iceI_begin_" << op->name() << spar << getArgsAsyncLambda(op, package, true, true) << epar
             << ';';
         out << eb;
 
-        vector<string> params = inParams;
-        params.push_back(contextParam);
-        params.push_back("boolean __explicitCtx");
-        params.push_back("boolean __synchronous");
-        vector<string> asyncParams = getParamsAsyncLambda(op, package, false, true, optionalMapping, false);
+        vector<string> params = getInOutParams(op, package, InParam, true, optionalMapping, true);
+        params.push_back("java.util.Map<String, String> context");
+        params.push_back("boolean explicitCtx");
+        params.push_back("boolean synchronous");
+        vector<string> asyncParams = getParamsAsyncLambda(op, package, false, true, optionalMapping, false, true);
         copy(asyncParams.begin(), asyncParams.end(), back_inserter(params));
 
         out << sp;
-        out << nl << "private Ice.AsyncResult begin_" << op->name();
+        out << nl << "private Ice.AsyncResult _iceI_begin_" << op->name();
         writeParamList(out, params);
         out << sb;
 
@@ -5065,12 +5149,12 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
 
         if(!op->returnsData())
         {
-            params = getInOutArgs(op, InParam);
-            params.push_back("__ctx");
-            params.push_back("__explicitCtx");
-            params.push_back("__synchronous");
-            params.push_back("new IceInternal.Functional_OnewayCallback(__responseCb, __exceptionCb, __sentCb)");
-            out << nl << "return begin_" << op->name();
+            params = getInOutArgs(op, InParam, true);
+            params.push_back("context");
+            params.push_back("explicitCtx");
+            params.push_back("synchronous");
+            params.push_back("new IceInternal.Functional_OnewayCallback(responseCb, exceptionCb, sentCb)");
+            out << nl << "return _iceI_begin_" << op->name();
             writeParamList(out, params);
             out << ';';
         }
@@ -5097,57 +5181,57 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
                 out << "userExceptionCb, ";
             }
             out << "exceptionCb, sentCb);";
-            out << nl << "__responseCb = responseCb;";
+            out << nl << "_responseCb = responseCb;";
             out << eb;
 
             out << sp;
             out << nl << "public void response" << spar << getParamsAsyncCB(op, package, false, true) << epar;
             out << sb;
-            out << nl << "if(__responseCb != null)";
+            out << nl << "if(_responseCb != null)";
             out << sb;
-            out << nl << "__responseCb.apply" << spar;
+            out << nl << "_responseCb.apply" << spar;
             if(ret)
             {
-                out << "__ret";
+                out << "ret";
             }
             out << getInOutArgs(op, OutParam) << epar << ';';
             out << eb;
             out << eb;
 
             out << sp;
-            out << nl << "public final void __completed(Ice.AsyncResult __result)";
+            out << nl << "public final void _iceCompleted(Ice.AsyncResult result)";
             out << sb;
-            out << nl << p->name() << "PrxHelper.__" << op->name() << "_completed(this, __result);";
+            out << nl << p->name() << "PrxHelper._iceI_" << op->name() << "_completed(this, result);";
             out << eb;
             out << sp;
-            out << nl << "private final " << getLambdaResponseCB(op, package) << " __responseCb;";
+            out << nl << "private final " << getLambdaResponseCB(op, package) << " _responseCb;";
             out << eb;
 
-            out << nl << "return begin_" << op->name() << spar << getInOutArgs(op, InParam) << "__ctx"
-                << "__explicitCtx"
-                << "__synchronous"
-                << (throws.empty() ? "new CB(__responseCb, __exceptionCb, __sentCb)" :
-                                     "new CB(__responseCb, __userExceptionCb, __exceptionCb, __sentCb)")
+            out << nl << "return _iceI_begin_" << op->name() << spar << getInOutArgs(op, InParam, true) << "context"
+                << "explicitCtx"
+                << "synchronous"
+                << (throws.empty() ? "new CB(responseCb, exceptionCb, sentCb)" :
+                                     "new CB(responseCb, userExceptionCb, exceptionCb, sentCb)")
                 << epar << ';';
         }
         else
         {
-            params = getInOutArgs(op, InParam);
-            params.push_back("__ctx");
-            params.push_back("__explicitCtx");
-            params.push_back("__synchronous");
+            params = getInOutArgs(op, InParam, true);
+            params.push_back("context");
+            params.push_back("explicitCtx");
+            params.push_back("synchronous");
 
             const string baseClass = getAsyncCallbackBaseClass(op, true);
-            out << nl << "return begin_" << op->name();
+            out << nl << "return _iceI_begin_" << op->name();
             writeParamList(out, params, false, false);
             out << nl
-                << (throws.empty() ? "new " + baseClass + "(__responseCb, __exceptionCb, __sentCb)" :
-                                     "new " + baseClass + "(__responseCb, __userExceptionCb, __exceptionCb, __sentCb)");
+                << (throws.empty() ? "new " + baseClass + "(responseCb, exceptionCb, sentCb)" :
+                                     "new " + baseClass + "(responseCb, userExceptionCb, exceptionCb, sentCb)");
             out.inc();
             out << sb;
-            out << nl << "public final void __completed(Ice.AsyncResult __result)";
+            out << nl << "public final void _iceCompleted(Ice.AsyncResult result)";
             out << sb;
-            out << nl << p->name() << "PrxHelper.__" << op->name() << "_completed(this, __result);";
+            out << nl << p->name() << "PrxHelper._iceI_" << op->name() << "_completed(this, result);";
             out << eb;
             out << eb;
             out << ");";
@@ -5157,34 +5241,34 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
         out << eb;
 
         //
-        // Implementation of begin method
+        // Implementation of _iceI_begin method
         //
-        params = inParams;
-        params.push_back(contextParam);
-        params.push_back("boolean __explicitCtx");
-        params.push_back("boolean __synchronous");
-        params.push_back("IceInternal.CallbackBase __cb");
+        params = getInOutParams(op, package, InParam, true, optionalMapping, true);
+        params.push_back("java.util.Map<String, String> context");
+        params.push_back("boolean explicitCtx");
+        params.push_back("boolean synchronous");
+        params.push_back("IceInternal.CallbackBase cb");
 
         out << sp;
-        out << nl << "private Ice.AsyncResult begin_" << op->name();
+        out << nl << "private Ice.AsyncResult _iceI_begin_" << op->name();
         writeParamList(out, params);
         out << sb;
         if(op->returnsData())
         {
-            out << nl << "__checkAsyncTwowayOnly(__" << op->name() << "_name);";
+            out << nl << "_checkAsyncTwowayOnly(_" << op->name() << "_name);";
         }
-        out << nl << "IceInternal.OutgoingAsync __result = getOutgoingAsync(__" << op->name()
-            << "_name, __cb);";
+        out << nl << "IceInternal.OutgoingAsync result = getOutgoingAsync(_" << op->name()
+            << "_name, cb);";
         out << nl << "try";
         out << sb;
 
-        out << nl << "__result.prepare(__" << op->name() << "_name, " << sliceModeToIceMode(op->sendMode())
-            << ", __ctx, __explicitCtx, __synchronous);";
+        out << nl << "result.prepare(_" << op->name() << "_name, " << sliceModeToIceMode(op->sendMode())
+            << ", context, explicitCtx, synchronous);";
 
         iter = 0;
         if(!inArgs.empty())
         {
-            out << nl << "Ice.OutputStream __os = __result.startWriteParams(" << opFormatTypeToString(op) << ");";
+            out << nl << "Ice.OutputStream ostr = result.startWriteParams(" << opFormatTypeToString(op) << ");";
             ParamDeclList pl;
             for(ParamDeclList::const_iterator pli = paramList.begin(); pli != paramList.end(); ++pli)
             {
@@ -5193,25 +5277,25 @@ Slice::GenCompat::HelperVisitor::writeOperation(const ClassDefPtr& p, const stri
                     pl.push_back(*pli);
                 }
             }
-            writeMarshalUnmarshalParams(out, package, pl, 0, iter, true, optionalMapping);
+            writeMarshalUnmarshalParams(out, package, pl, 0, iter, true, optionalMapping, true);
             if(op->sendsClasses(false))
             {
-                out << nl << "__os.writePendingValues();";
+                out << nl << "ostr.writePendingValues();";
             }
-            out << nl << "__result.endWriteParams();";
+            out << nl << "result.endWriteParams();";
         }
         else
         {
-            out << nl << "__result.writeEmptyParams();";
+            out << nl << "result.writeEmptyParams();";
         }
 
-        out << nl << "__result.invoke();";
+        out << nl << "result.invoke();";
         out << eb;
-        out << nl << "catch(Ice.Exception __ex)";
+        out << nl << "catch(Ice.Exception ex)";
         out << sb;
-        out << nl << "__result.abort(__ex);";
+        out << nl << "result.abort(ex);";
         out << eb;
-        out << nl << "return __result;";
+        out << nl << "return result;";
         out << eb;
     }
 }
@@ -5293,12 +5377,13 @@ Slice::GenCompat::ProxyVisitor::visitOperation(const OperationPtr& p)
     throws.unique();
 
     string deprecateReason = getDeprecateReason(p, cl, "operation");
-    string contextDoc = "@param __ctx The Context map to send with the invocation.";
-    string contextParam = "java.util.Map<String, String> __ctx";
-    string lambdaResponseDoc = "@param __responseCb The lambda response callback.";
-    string lambdaUserExDoc = "@param __userExceptionCb The lambda user exception callback.";
-    string lambdaExDoc = "@param __exceptionCb The lambda exception callback.";
-    string lambdaSentDoc = "@param __sentCb The lambda sent callback.";
+    string contextDoc = "@param context The Context map to send with the invocation.";
+    string contextParamName = getEscapedParamName(p, "context");
+    string contextParam = "java.util.Map<String, String> " + contextParamName;
+    string lambdaResponseDoc = "@param responseCb The lambda response callback.";
+    string lambdaUserExDoc = "@param userExceptionCb The lambda user exception callback.";
+    string lambdaExDoc = "@param exceptionCb The lambda exception callback.";
+    string lambdaSentDoc = "@param sentCb The lambda sent callback.";
 
     const bool optional = p->sendsOptionals();
 
@@ -5346,8 +5431,8 @@ Slice::GenCompat::ProxyVisitor::visitOperation(const OperationPtr& p)
         // Start with the type-unsafe begin methods.
         //
         vector<string> inParams = getInOutParams(p, package, InParam, true, true);
-        string callbackParam = "Ice.Callback __cb";
-        string callbackDoc = "@param __cb The asynchronous callback object.";
+        string callbackParam = "Ice.Callback " + getEscapedParamName(p, "cb");
+        string callbackDoc = "@param cb The asynchronous callback object.";
 
         out << sp;
         writeDocCommentAMI(out, p, InParam);
@@ -5378,7 +5463,7 @@ Slice::GenCompat::ProxyVisitor::visitOperation(const OperationPtr& p)
         ContainerPtr container = p->container();
         ClassDefPtr cl = ClassDefPtr::dynamicCast(container);
         string opClassName = getAbsolute(cl, package, "Callback_", '_' + p->name());
-        typeSafeCallbackParam = opClassName + " __cb";
+        typeSafeCallbackParam = opClassName + " " + getEscapedParamName(p, "cb");
 
         out << sp;
         writeDocCommentAMI(out, p, InParam, callbackDoc);
@@ -5444,7 +5529,7 @@ Slice::GenCompat::ProxyVisitor::visitOperation(const OperationPtr& p)
 
         out << sp;
         writeDocCommentAMI(out, p, OutParam);
-        out << nl << "public " << retS << " end_" << p->name() << spar << outParams << "Ice.AsyncResult __result"
+        out << nl << "public " << retS << " end_" << p->name() << spar << outParams << "Ice.AsyncResult result"
             << epar;
         writeThrowsClause(package, throws);
         out << ';';
@@ -5456,8 +5541,8 @@ Slice::GenCompat::ProxyVisitor::visitOperation(const OperationPtr& p)
         // Write overloaded versions of the methods using required params.
         //
         vector<string> inParams = getInOutParams(p, package, InParam, true, false);
-        string callbackParam = "Ice.Callback __cb";
-        string callbackDoc = "@param __cb The asynchronous callback object.";
+        string callbackParam = "Ice.Callback " + getEscapedParamName(p, "cb");
+        string callbackDoc = "@param cb The asynchronous callback object.";
 
         out << sp;
         writeDocCommentAMI(out, p, InParam);
@@ -5520,7 +5605,7 @@ Slice::GenCompat::ProxyVisitor::visitOperation(const OperationPtr& p)
         ContainerPtr container = p->container();
         ClassDefPtr cl = ClassDefPtr::dynamicCast(container);
         string opClassName = getAbsolute(cl, package, "Callback_", '_' + p->name());
-        typeSafeCallbackParam = opClassName + " __cb";
+        typeSafeCallbackParam = opClassName + " " + getEscapedParamName(p, "cb");
 
         out << sp;
         writeDocCommentAMI(out, p, InParam, callbackDoc);
@@ -5559,14 +5644,6 @@ Slice::GenCompat::DispatcherVisitor::visitClassDefStart(const ClassDefPtr& p)
         out << nl << "public abstract class _" << name << "Disp extends Ice.ObjectImpl implements " << fixKwd(name);
         out << sb;
 
-        out << sp << nl << "protected void" << nl << "ice_copyStateFrom(Ice.Object __obj)";
-        out.inc();
-        out << nl << "throws java.lang.CloneNotSupportedException";
-        out.dec();
-        out << sb;
-        out << nl << "throw new java.lang.CloneNotSupportedException();";
-        out << eb;
-
         writeDispatchAndMarshalling(out, p);
 
         //
@@ -5707,9 +5784,12 @@ Slice::GenCompat::DispatcherVisitor::visitClassDefStart(const ClassDefPtr& p)
                 out << nl << "@SuppressWarnings(\"deprecation\")";
             }
             out << nl << "public " << (hasAMD ? string("void") : retS) << ' ' << opName << spar << params;
+
+            const string currentParamName = getEscapedParamName((*r), "current");
+
             if(!p->isLocal())
             {
-                out << "Ice.Current __current";
+                out << "Ice.Current " + currentParamName;
             }
             out << epar;
 
@@ -5735,7 +5815,7 @@ Slice::GenCompat::DispatcherVisitor::visitClassDefStart(const ClassDefPtr& p)
             out << "_ice_delegate." << opName << spar << args;
             if(!p->isLocal())
             {
-                out << "__current";
+                out << currentParamName;
             }
             out << epar << ';';
             out << eb;
@@ -5952,7 +6032,8 @@ Slice::GenCompat::BaseImplVisitor::writeOperation(Output& out, const string& pac
     {
         vector<string> paramsAMD = getParamsAsync(op, package, true, true);
 
-        out << sp << nl << "public void " << opName << "_async" << spar << paramsAMD << "Ice.Current __current"
+        out << sp << nl << "public void " << opName << "_async" << spar << paramsAMD
+            << "Ice.Current " + getEscapedParamName(op, "current")
             << epar;
 
         ExceptionList throws = op->throws();
@@ -5974,7 +6055,7 @@ Slice::GenCompat::BaseImplVisitor::writeOperation(Output& out, const string& pac
 
         out << sb;
 
-        string result = "__r";
+        string result = "r";
         ParamDeclList paramList = op->parameters();
         for(ParamDeclList::const_iterator q = paramList.begin(); q != paramList.end(); ++q)
         {
@@ -5997,7 +6078,7 @@ Slice::GenCompat::BaseImplVisitor::writeOperation(Output& out, const string& pac
             }
         }
 
-        out << nl << "__cb.ice_response(";
+        out << nl << "cb.ice_response(";
         if(ret)
         {
             out << result;
@@ -6022,9 +6103,10 @@ Slice::GenCompat::BaseImplVisitor::writeOperation(Output& out, const string& pac
     else
     {
         out << sp << nl << "public " << retS << nl << fixKwd(opName) << spar << params;
+
         if(!local)
         {
-            out << "Ice.Current __current";
+            out << "Ice.Current " + getEscapedParamName(op, "current");
         }
         out << epar;
 
@@ -6278,9 +6360,9 @@ Slice::GenCompat::AsyncVisitor::visitOperation(const OperationPtr& p)
             out.dec();
             out << sb;
 
-            out << sp << nl << "public final void __completed(Ice.AsyncResult __result)";
+            out << sp << nl << "public final void _iceCompleted(Ice.AsyncResult result)";
             out << sb;
-            out << nl << cl->name() << "PrxHelper.__" << p->name() << "_completed(this, __result);";
+            out << nl << cl->name() << "PrxHelper._iceI_" << p->name() << "_completed(this, result);";
             out << eb;
 
             out << eb;
@@ -6357,11 +6439,11 @@ Slice::GenCompat::AsyncVisitor::visitOperation(const OperationPtr& p)
             iter = 0;
             if(ret || !outParams.empty())
             {
-                out << nl << "Ice.OutputStream __os = this.startWriteParams();";
-                writeMarshalUnmarshalParams(out, classPkg, outParams, p, iter, true, optionalMapping, false);
+                out << nl << "Ice.OutputStream ostr_ = this.startWriteParams();";
+                writeMarshalUnmarshalParams(out, classPkg, outParams, p, iter, true, optionalMapping, false, "ret", false);
                 if(p->returnsClasses(false))
                 {
-                    out << nl << "__os.writePendingValues();";
+                    out << nl << "ostr_.writePendingValues();";
                 }
                 out << nl << "this.endWriteParams();";
             }
diff --git a/cpp/src/slice2java/GenCompat.h b/cpp/src/slice2java/GenCompat.h
index a55841a43c9..dde47bc772a 100644
--- a/cpp/src/slice2java/GenCompat.h
+++ b/cpp/src/slice2java/GenCompat.h
@@ -35,8 +35,8 @@ protected:
     // Compose the parameter lists for an operation.
     //
     std::vector<std::string> getParams(const OperationPtr&, const std::string&, bool, bool);
-    std::vector<std::string> getParamsProxy(const OperationPtr&, const std::string&, bool, bool);
-    std::vector<std::string> getInOutParams(const OperationPtr&, const std::string&, ParamDir, bool, bool);
+    std::vector<std::string> getParamsProxy(const OperationPtr&, const std::string&, bool, bool, bool = false);
+    std::vector<std::string> getInOutParams(const OperationPtr&, const std::string&, ParamDir, bool, bool, bool = false);
     std::vector<std::string> getParamsAsync(const OperationPtr&, const std::string&, bool, bool);
     std::vector<std::string> getParamsAsyncCB(const OperationPtr&, const std::string&, bool, bool);
 
@@ -46,20 +46,22 @@ protected:
     std::vector<std::string> getParamsAsyncLambda(const OperationPtr&, const std::string&,
                                                   bool context = false, bool sentCB = false,
                                                   bool optionalMapping = false,
-                                                  bool inParams = true);
+                                                  bool inParams = true,
+                                                  bool internal = false);
     std::vector<std::string> getArgsAsyncLambda(const OperationPtr&, const std::string&,
-                                                bool context = false, bool sentCB = false);
+                                                bool context = false,
+                                                bool sentCB = false);
 
     //
     // Compose the argument lists for an operation.
     //
     std::vector<std::string> getArgs(const OperationPtr&);
-    std::vector<std::string> getInOutArgs(const OperationPtr&, ParamDir);
+    std::vector<std::string> getInOutArgs(const OperationPtr&, ParamDir, bool = false);
     std::vector<std::string> getArgsAsync(const OperationPtr&);
     std::vector<std::string> getArgsAsyncCB(const OperationPtr&);
 
     void writeMarshalUnmarshalParams(::IceUtilInternal::Output&, const std::string&, const ParamDeclList&,
-                                     const OperationPtr&, int&, bool, bool, bool = false);
+                                     const OperationPtr&, int&, bool, bool, bool, const std::string& = "", bool = false);
 
     //
     // Generate a throws clause containing only non-local exceptions.
@@ -75,9 +77,9 @@ protected:
     //
     // Marshal/unmarshal a data member.
     //
-    void writeMarshalDataMember(::IceUtilInternal::Output&, const std::string&, const DataMemberPtr&, int&);
+    void writeMarshalDataMember(::IceUtilInternal::Output&, const std::string&, const DataMemberPtr&, int&, bool = false);
     void writeUnmarshalDataMember(::IceUtilInternal::Output&, const std::string&, const DataMemberPtr&, int&,
-                                  bool, int&);
+                                  bool, int&, bool = false);
     void writeStreamMarshalDataMember(::IceUtilInternal::Output&, const std::string&, const DataMemberPtr&, int&);
     void writeStreamUnmarshalDataMember(::IceUtilInternal::Output&, const std::string&, const DataMemberPtr&, int&,
                                         bool, int&);