--- old/src/share/classes/java/util/IdentityHashMap.java	2011-12-03 15:57:57.862388687 +0100
+++ new/src/share/classes/java/util/IdentityHashMap.java	2011-12-03 15:57:57.725388701 +0100
@@ -327,6 +327,7 @@
      *
      * @see #put(Object, Object)
      */
+    @SuppressWarnings("unchecked")
     public V get(Object key) {
         Object k = maskNull(key);
         Object[] tab = table;
@@ -431,7 +432,8 @@
         Object item;
         while ( (item = tab[i]) != null) {
             if (item == k) {
-                V oldValue = (V) tab[i + 1];
+                @SuppressWarnings("unchecked")
+                    V oldValue = (V) tab[i + 1];
                 tab[i + 1] = value;
                 return oldValue;
             }
@@ -524,7 +526,8 @@
             if (item == k) {
                 modCount++;
                 size--;
-                V oldValue = (V) tab[i + 1];
+                @SuppressWarnings("unchecked")
+                    V oldValue = (V) tab[i + 1];
                 tab[i + 1] = null;
                 tab[i] = null;
                 closeDeletion(i);
@@ -638,7 +641,7 @@
         if (o == this) {
             return true;
         } else if (o instanceof IdentityHashMap) {
-            IdentityHashMap m = (IdentityHashMap) o;
+            IdentityHashMap<?,?> m = (IdentityHashMap<?,?>) o;
             if (m.size() != size)
                 return false;
 
@@ -650,7 +653,7 @@
             }
             return true;
         } else if (o instanceof Map) {
-            Map m = (Map)o;
+            Map<?,?> m = (Map<?,?>)o;
             return entrySet().equals(m.entrySet());
         } else {
             return false;  // o is not a Map
@@ -698,7 +701,7 @@
      */
     public Object clone() {
         try {
-            IdentityHashMap<K,V> m = (IdentityHashMap<K,V>) super.clone();
+            IdentityHashMap<?,?> m = (IdentityHashMap<?,?>) super.clone();
             m.entrySet = null;
             m.table = table.clone();
             return m;
@@ -768,7 +771,7 @@
             int len = tab.length;
 
             int d = deletedSlot;
-            K key = (K) tab[d];
+            Object key = tab[d];
             tab[d] = null;        // vacate the slot
             tab[d + 1] = null;
 
@@ -818,12 +821,14 @@
     }
 
     private class KeyIterator extends IdentityHashMapIterator<K> {
+        @SuppressWarnings("unchecked")
         public K next() {
             return (K) unmaskNull(traversalTable[nextIndex()]);
         }
     }
 
     private class ValueIterator extends IdentityHashMapIterator<V> {
+        @SuppressWarnings("unchecked")
         public V next() {
             return (V) traversalTable[nextIndex() + 1];
         }
@@ -854,16 +859,19 @@
                 this.index = index;
             }
 
+            @SuppressWarnings("unchecked")
             public K getKey() {
                 checkIndexForEntryUse();
                 return (K) unmaskNull(traversalTable[index]);
             }
 
+            @SuppressWarnings("unchecked")
             public V getValue() {
                 checkIndexForEntryUse();
                 return (V) traversalTable[index+1];
             }
 
+            @SuppressWarnings("unchecked")
             public V setValue(V value) {
                 checkIndexForEntryUse();
                 V oldValue = (V) traversalTable[index+1];
@@ -880,7 +888,7 @@
 
                 if (!(o instanceof Map.Entry))
                     return false;
-                Map.Entry e = (Map.Entry)o;
+                Map.Entry<?,?> e = (Map.Entry<?,?>)o;
                 return (e.getKey() == unmaskNull(traversalTable[index]) &&
                        e.getValue() == traversalTable[index+1]);
             }
@@ -1109,13 +1117,13 @@
         public boolean contains(Object o) {
             if (!(o instanceof Map.Entry))
                 return false;
-            Map.Entry entry = (Map.Entry)o;
+            Map.Entry<?,?> entry = (Map.Entry<?,?>)o;
             return containsMapping(entry.getKey(), entry.getValue());
         }
         public boolean remove(Object o) {
             if (!(o instanceof Map.Entry))
                 return false;
-            Map.Entry entry = (Map.Entry)o;
+            Map.Entry<?,?> entry = (Map.Entry<?,?>)o;
             return removeMapping(entry.getKey(), entry.getValue());
         }
         public int size() {
@@ -1213,8 +1221,10 @@
 
         // Read the keys and values, and put the mappings in the table
         for (int i=0; i<size; i++) {
-            K key = (K) s.readObject();
-            V value = (V) s.readObject();
+            @SuppressWarnings("unchecked")
+                K key = (K) s.readObject();
+            @SuppressWarnings("unchecked")
+                V value = (V) s.readObject();
             putForCreate(key, value);
         }
     }
@@ -1226,7 +1236,7 @@
     private void putForCreate(K key, V value)
         throws IOException
     {
-        K k = (K)maskNull(key);
+        Object k = maskNull(key);
         Object[] tab = table;
         int len = tab.length;
         int i = hash(k, len);