Observer.java revision f5597e626ecf7949d249dea08c1a2964d890ec11
172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen/* 2c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * Licensed to the Apache Software Foundation (ASF) under one or more 3c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * contributor license agreements. See the NOTICE file distributed with 4c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * this work for additional information regarding copyright ownership. 5731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick * The ASF licenses this file to You under the Apache License, Version 2.0 6c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * (the "License"); you may not use this file except in compliance with 7c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * the License. You may obtain a copy of the License at 8ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsen * 9c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * http://www.apache.org/licenses/LICENSE-2.0 10c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * 11c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * Unless required by applicable law or agreed to in writing, software 12c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * distributed under the License is distributed on an "AS IS" BASIS, 133f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 143f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen * See the License for the specific language governing permissions and 15c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * limitations under the License. 16c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott */ 17c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 18c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottpackage java.util; 19c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 20c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 21731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick/** 22731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick * {@code Observer} is the interface to be implemented by objects that 23c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * receive notification of updates on an {@code Observable} object. 24c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * 25c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * @see Observable 26c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott */ 27c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottpublic interface Observer { 28c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 29c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott /** 30c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * This method is called if the specified {@code Observable} object's 31c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * {@code notifyObservers} method is called (because the {@code Observable} 32c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * object has been updated. 33c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * 34c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * @param observable 35c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * the {@link Observable} object. 36c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * @param data 37c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott * the data passed to {@link Observable#notifyObservers(Object)}. 38c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott */ 39c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott void update(Observable observable, Object data); 40c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 41c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott