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