src/share/classes/java/util/HashSet.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -245,12 +245,14 @@
      * Returns a shallow copy of this <tt>HashSet</tt> instance: the elements
      * themselves are not cloned.
      *
      * @return a shallow copy of this set
      */
-    public Object clone() {
+    @Override
+    public HashSet<E> clone() {
         try {
+            @SuppressWarnings("unchecked")
             HashSet<E> newSet = (HashSet<E>) super.clone();
             newSet.map = (HashMap<E, Object>) map.clone();
             return newSet;
         } catch (CloneNotSupportedException e) {
             throw new InternalError(e);

@@ -303,10 +305,11 @@
         // Read in size
         int size = s.readInt();
 
         // Read in all elements in the proper order.
         for (int i=0; i<size; i++) {
+            @SuppressWarnings("unchecked")
             E e = (E) s.readObject();
             map.put(e, PRESENT);
         }
     }
 }