diff -r 6517bf8e50d0 -r c46e0c9940d6 src/share/classes/com/sun/tools/javah/LLNI.java
--- a/src/share/classes/com/sun/tools/javah/LLNI.java	Wed Oct 10 18:34:46 2012 -0700
+++ b/src/share/classes/com/sun/tools/javah/LLNI.java	Wed Oct 10 18:44:21 2012 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -647,7 +647,7 @@
        %%% This may not be right, but should be called more often. */
     protected final String nameToIdentifier(String name) {
         int len = name.length();
-        StringBuffer buf = new StringBuffer(len);
+        StringBuilder buf = new StringBuilder(len);
         for (int i = 0; i < len; i++) {
             char c = name.charAt(i);
             if (isASCIILetterOrDigit(c))