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Java Source | 1996-05-03 | 1.3 KB | 38 lines |
- /*
- * @(#)Observer.java 1.8 95/12/15 Chris Warth
- *
- * Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL purposes and without
- * fee is hereby granted provided that this copyright notice
- * appears in all copies. Please refer to the file "copyright.html"
- * for further important copyright and licensing information.
- *
- * 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.
- */
- package java.util;
-
- /**
- * When implemented, this interface allows all classes
- * to be observable by instances of class Observer.
- *
- * @version 1.8 15 Dec 1995
- * @author Chris Warth
- */
- public interface Observer {
-
- /**
- * Called when observers in the observable list need to be
- * updated.
- * @param o the list of observers
- * @param arg the argument being notified
- */
- void update(Observable o, Object arg);
- }
-