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 preferences change events. The
23 * implementation of this interface can be installed by the {@code Preferences}
24 * instance.
25 *
26 * @see Preferences
27 * @see PreferenceChangeEvent
28 *
29 *
30 * @since 1.4
31 */
32public interface PreferenceChangeListener extends EventListener {
33
34    /**
35     * This method gets invoked whenever a preference is added, deleted or
36     * updated.
37     *
38     * @param pce
39     *            the event instance which describes the changed {@code Preferences}
40     *            instance and the preference value.
41     */
42    void preferenceChange (PreferenceChangeEvent pce);
43}
44