--- old/src/share/classes/java/util/IdentityHashMap.java	2012-01-29 19:33:36.000000000 -0800
+++ new/src/share/classes/java/util/IdentityHashMap.java	2012-01-29 19:33:36.000000000 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 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
@@ -696,8 +696,10 @@
      *
      * @return a shallow copy of this map
      */
-    public Object clone() {
+    @Override
+    public IdentityHashMap<K,V> clone() {
         try {
+            @SuppressWarnings("unchecked")
             IdentityHashMap<K,V> m = (IdentityHashMap<K,V>) super.clone();
             m.entrySet = null;
             m.table = table.clone();