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

*** 1,7 ****
  /*
!  * Copyright (c) 2000, 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
--- 1,7 ----
  /*
!  * 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
*** 32,41 ****
--- 32,42 ----
   * @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>