--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/util/prefs/PreferenceChangeEvent.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2000-2003 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.util.prefs;
+
+import java.io.NotSerializableException;
+
+/**
+ * An event emitted by a <tt>Preferences</tt> node to indicate that
+ * a preference has been added, removed or has had its value changed.<p>
+ *
+ * Note, that although PreferenceChangeEvent inherits Serializable interface
+ * from EventObject, it is not intended to be Serializable. Appropriate
+ * serialization methods are implemented to throw NotSerializableException.
+ *
+ * @author  Josh Bloch
+ * @see Preferences
+ * @see PreferenceChangeListener
+ * @see NodeChangeEvent
+ * @since   1.4
+ * @serial exclude
+ */
+public class PreferenceChangeEvent extends java.util.EventObject {
+
+    /**
+     * Key of the preference that changed.
+     *
+     * @serial
+     */
+    private String key;
+
+    /**
+     * New value for preference, or <tt>null</tt> if it was removed.
+     *
+     * @serial
+     */
+    private String newValue;
+
+    /**
+     * Constructs a new <code>PreferenceChangeEvent</code> instance.
+     *
+     * @param node  The Preferences node that emitted the event.
+     * @param key  The key of the preference that was changed.
+     * @param newValue  The new value of the preference, or <tt>null</tt>
+     *                  if the preference is being removed.
+     */
+    public PreferenceChangeEvent(Preferences node, String key,
+                                 String newValue) {
+        super(node);
+        this.key = key;
+        this.newValue = newValue;
+    }
+
+    /**
+     * Returns the preference node that emitted the event.
+     *
+     * @return  The preference node that emitted the event.
+     */
+    public Preferences getNode() {
+        return (Preferences) getSource();
+    }
+
+    /**
+     * Returns the key of the preference that was changed.
+     *
+     * @return  The key of the preference that was changed.
+     */
+    public String getKey() {
+        return key;
+    }
+
+    /**
+     * Returns the new value for the preference.
+     *
+     * @return  The new value for the preference, or <tt>null</tt> if the
+     *          preference was removed.
+     */
+    public String getNewValue() {
+        return newValue;
+    }
+
+    /**
+     * Throws NotSerializableException, since NodeChangeEvent objects
+     * are not intended to be serializable.
+     */
+     private void writeObject(java.io.ObjectOutputStream out)
+                                               throws NotSerializableException {
+         throw new NotSerializableException("Not serializable.");
+     }
+
+    /**
+     * Throws NotSerializableException, since PreferenceChangeEvent objects
+     * are not intended to be serializable.
+     */
+     private void readObject(java.io.ObjectInputStream in)
+                                               throws NotSerializableException {
+         throw new NotSerializableException("Not serializable.");
+     }
+
+    // Defined so that this class isn't flagged as a potential problem when
+    // searches for missing serialVersionUID fields are done.
+    private static final long serialVersionUID = 793724513368024975L;
+}