src/share/classes/java/util/prefs/PreferenceChangeListener.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2013, 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

@@ -32,10 +32,11 @@
  * @see Preferences
  * @see PreferenceChangeEvent
  * @see NodeChangeListener
  * @since   1.4
  */
+@FunctionalInterface
 public interface PreferenceChangeListener extends java.util.EventListener {
     /**
      * This method gets called when a preference is added, removed or when
      * its value is changed.
      * <p>