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Java Source | 2000-05-25 | 4.0 KB | 113 lines |
- //: ColorBoxes.java
- //////////////////////////////////////////////////
- // Copyright (c) Bruce Eckel, 1998
- // Source code file from the book "Thinking in Java"
- // All rights reserved EXCEPT as allowed by the
- // following statements: You can freely use this file
- // for your own work (personal or commercial),
- // including modifications and distribution in
- // executable form only. Permission is granted to use
- // this file in classroom situations, including its
- // use in presentation materials, as long as the book
- // "Thinking in Java" is cited as the source.
- // Except in classroom situations, you cannot copy
- // and distribute this code; instead, the sole
- // distribution point is http://www.BruceEckel.com
- // (and official mirror sites) where it is
- // freely available. You cannot remove this
- // copyright and notice. You cannot distribute
- // modified versions of the source code in this
- // package. You cannot use this file in printed
- // media without the express permission of the
- // author. Bruce Eckel makes no representation about
- // the suitability of this software for any purpose.
- // It is provided "as is" without express or implied
- // warranty of any kind, including any implied
- // warranty of merchantability, fitness for a
- // particular purpose or non-infringement. The entire
- // risk as to the quality and performance of the
- // software is with you. Bruce Eckel and the
- // publisher shall not be liable for any damages
- // suffered by you or any third party as a result of
- // using or distributing software. In no event will
- // Bruce Eckel or the publisher be liable for any
- // lost revenue, profit, or data, or for direct,
- // indirect, special, consequential, incidental, or
- // punitive damages, however caused and regardless of
- // the theory of liability, arising out of the use of
- // or inability to use software, even if Bruce Eckel
- // and the publisher have been advised of the
- // possibility of such damages. Should the software
- // prove defective, you assume the cost of all
- // necessary servicing, repair, or correction. If you
- // think you've found an error, please email all
- // modified files with clearly commented changes to:
- // Bruce@EckelObjects.com. (Please use the same
- // address for non-code errors found in the book.)
- /////////////////////////////////////////////////
-
- // Using the Runnable interface
- import java.awt.*;
- import java.awt.event.*;
-
- class CBox extends Canvas implements Runnable {
- private Thread t;
- private int pause;
- private static final Color[] colors = {
- Color.black, Color.blue, Color.cyan,
- Color.darkGray, Color.gray, Color.green,
- Color.lightGray, Color.magenta,
- Color.orange, Color.pink, Color.red,
- Color.white, Color.yellow
- };
- private Color cColor = newColor();
- private static final Color newColor() {
- return colors[
- (int)(Math.random() * colors.length)
- ];
- }
- public void paint(Graphics g) {
- g.setColor(cColor);
- Dimension s = getSize();
- g.fillRect(0, 0, s.width, s.height);
- }
- public CBox(int pause) {
- this.pause = pause;
- t = new Thread(this);
- t.start();
- }
- public void run() {
- while(true) {
- cColor = newColor();
- repaint();
- try {
- t.sleep(pause);
- } catch(InterruptedException e) {}
- }
- }
- }
-
- public class ColorBoxes extends Frame {
- public ColorBoxes(int pause, int grid) {
- setTitle("ColorBoxes");
- setLayout(new GridLayout(grid, grid));
- for (int i = 0; i < grid * grid; i++)
- add(new CBox(pause));
- addWindowListener(new WindowAdapter() {
- public void windowClosing(WindowEvent e) {
- System.exit(0);
- }
- });
- }
- public static void main(String[] args) {
- int pause = 50;
- int grid = 8;
- if(args.length > 0)
- pause = Integer.parseInt(args[0]);
- if(args.length > 1)
- grid = Integer.parseInt(args[1]);
- Frame f = new ColorBoxes(pause, grid);
- f.setSize(500, 400);
- f.setVisible(true);
- }
- } ///:~