1/* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements.  See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License.  You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package java.util.prefs;
18
19import java.util.EventListener;
20
21/**
22 * This interface is used to handle preference node change events. The
23 * implementation of this interface can be installed by the {@code Preferences}
24 * instance.
25 *
26 * @see Preferences
27 * @see NodeChangeEvent
28 *
29 * @since 1.4
30 */
31public interface NodeChangeListener extends EventListener {
32    /**
33     * This method gets called whenever a child node is added to another node.
34     *
35     * @param e
36     *            the node change event.
37     */
38    public void childAdded (NodeChangeEvent e);
39
40    /**
41     * This method gets called whenever a child node is removed from another
42     * node.
43     *
44     * @param e
45     *            the node change event.
46     */
47    public void childRemoved (NodeChangeEvent e);
48}
49