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1   /*
2    * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
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7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
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19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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25  
26  package java.util.prefs;
27  
28  /**
29   * A listener for receiving preference node change events.
30   *
31   * @author  Josh Bloch
32   * @see     Preferences
33   * @see     NodeChangeEvent
34   * @see     PreferenceChangeListener
35   * @since   1.4
36   */
37  
38  public interface NodeChangeListener extends java.util.EventListener {
39      /**
40       * This method gets called when a child node is added.
41       *
42       * @param evt A node change event object describing the parent
43       *            and child node.
44       */
45      void childAdded(NodeChangeEvent evt);
46  
47      /**
48       * This method gets called when a child node is removed.
49       *
50       * @param evt A node change event object describing the parent
51       *            and child node.
52       */
53      void childRemoved(NodeChangeEvent evt);
54  }