| /* |
| Copyright (c) Xerox Corporation 1998-2002. All rights reserved. |
| |
| Use and copying of this software and preparation of derivative works based |
| upon this software are permitted. Any distribution of this software or |
| derivative works must comply with all applicable United States export control |
| laws. |
| |
| This software is made available AS IS, and Xerox Corporation makes no warranty |
| about the software, its performance or its conformity to any specification. |
| */ |
| |
| package observer; |
| |
| public class Demo { |
| public static void main(String[] args) { |
| |
| Display display = new Display(); |
| Button b1 = new Button(display); |
| Button b2 = new Button(display); |
| ColorLabel c1 = new ColorLabel(display); |
| ColorLabel c2 = new ColorLabel(display); |
| ColorLabel c3 = new ColorLabel(display); |
| |
| b1.addObserver(c1); |
| b1.addObserver(c2); |
| b2.addObserver(c3); |
| } |
| } |
