--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/lang/ref/WeakReference.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,72 @@
+/*
+ * Copyright 1997-2003 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.lang.ref;
+
+
+/**
+ * Weak reference objects, which do not prevent their referents from being
+ * made finalizable, finalized, and then reclaimed.  Weak references are most
+ * often used to implement canonicalizing mappings.
+ *
+ * <p> Suppose that the garbage collector determines at a certain point in time
+ * that an object is <a href="package-summary.html#reachability">weakly
+ * reachable</a>.  At that time it will atomically clear all weak references to
+ * that object and all weak references to any other weakly-reachable objects
+ * from which that object is reachable through a chain of strong and soft
+ * references.  At the same time it will declare all of the formerly
+ * weakly-reachable objects to be finalizable.  At the same time or at some
+ * later time it will enqueue those newly-cleared weak references that are
+ * registered with reference queues.
+ *
+ * @author   Mark Reinhold
+ * @since    1.2
+ */
+
+public class WeakReference<T> extends Reference<T> {
+
+    /**
+     * Creates a new weak reference that refers to the given object.  The new
+     * reference is not registered with any queue.
+     *
+     * @param referent object the new weak reference will refer to
+     */
+    public WeakReference(T referent) {
+        super(referent);
+    }
+
+    /**
+     * Creates a new weak reference that refers to the given object and is
+     * registered with the given queue.
+     *
+     * @param referent object the new weak reference will refer to
+     * @param q the queue with which the reference is to be registered,
+     *          or <tt>null</tt> if registration is not required
+     */
+    public WeakReference(T referent, ReferenceQueue<? super T> q) {
+        super(referent, q);
+    }
+
+}