diff -r 5ebbcf0cb20f -r 673ea6efaf18 hotspot/src/share/vm/classfile/javaClasses.cpp
--- a/hotspot/src/share/vm/classfile/javaClasses.cpp	Mon Jun 11 13:10:14 2012 -0400
+++ b/hotspot/src/share/vm/classfile/javaClasses.cpp	Wed Jun 13 19:52:59 2012 -0400
@@ -23,6 +23,7 @@
  */
 
 #include "precompiled.hpp"
+#include "classfile/altHashing.hpp"
 #include "classfile/javaClasses.hpp"
 #include "classfile/symbolTable.hpp"
 #include "classfile/vmSymbols.hpp"
@@ -347,13 +348,26 @@
   return result;
 }
 
-unsigned int java_lang_String::hash_string(oop java_string) {
+unsigned int java_lang_String::to_hash(oop java_string) {
+  int          length = java_lang_String::length(java_string);
+  // Zero length string will hash to zero with String.toHash() function.
+  if (length == 0) return 0;
+
   typeArrayOop value  = java_lang_String::value(java_string);
   int          offset = java_lang_String::offset(java_string);
+  return java_lang_String::to_hash(value->char_at_addr(offset), length);
+}
+
+unsigned int java_lang_String::hash_string(oop java_string) {
   int          length = java_lang_String::length(java_string);
-
-  if (length == 0) return 0;
-  return hash_string(value->char_at_addr(offset), length);
+  // Zero length string doesn't hash necessarily hash to zero.
+  if (length == 0) {
+    return StringTable::hash_string(NULL, 0);
+  }
+
+  typeArrayOop value  = java_lang_String::value(java_string);
+  int          offset = java_lang_String::offset(java_string);
+  return StringTable::hash_string(value->char_at_addr(offset), length);
 }
 
 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {