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Java Source | 1997-05-20 | 1.6 KB | 47 lines |
- /*
- * @(#)Observer.java 1.10 97/01/28
- *
- * Copyright (c) 1995, 1996 Sun Microsystems, Inc. All Rights Reserved.
- *
- * This software is the confidential and proprietary information of Sun
- * Microsystems, Inc. ("Confidential Information"). You shall not
- * disclose such Confidential Information and shall use it only in
- * accordance with the terms of the license agreement you entered into
- * with Sun.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
- * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
- * PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
- * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
- * THIS SOFTWARE OR ITS DERIVATIVES.
- *
- * CopyrightVersion 1.1_beta
- *
- */
- package java.util;
-
- /**
- * A class can implement the <code>Observer</code> interface when it
- * wants to be informed of changes in observable objects.
- *
- * @author Chris Warth
- * @version 1.10, 01/28/97
- * @see java.util.Observable
- * @since JDK1.0
- */
- public interface Observer {
- /**
- * This method is called whenever the observed object is changed. An
- * application calls an observable object's
- * <code>notifyObservers</code> method to have all the object's
- * observers notified of the change.
- *
- * @param o the observable object.
- * @param arg an argument passed to the <code>notifyObservers</code>
- * method.
- * @since JDK1.0
- */
- void update(Observable o, Object arg);
- }
-