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Java Source | 1998-05-08 | 3.3 KB | 96 lines |
- /*
- * @(#)Blink.java 1.3 96/12/06
- *
- * Copyright (c) 1994-1996 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
- * modify and redistribute this software in source and binary code form,
- * provided that i) this copyright notice and license appear on all copies of
- * the software; and ii) Licensee does not utilize the software in a manner
- * which is disparaging to Sun.
- *
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
- * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
- * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
- * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
- * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
- * LICENSORS 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 SUN HAS BEEN ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- *
- * This software is not designed or intended for use in on-line control of
- * aircraft, air traffic, aircraft navigation or aircraft communications; or in
- * the design, construction, operation or maintenance of any nuclear
- * facility. Licensee represents and warrants that it will not use or
- * redistribute the Software for such purposes.
- */
-
- import java.awt.*;
- import java.util.StringTokenizer;
-
- /**
- * I love blinking things.
- *
- * @author Arthur van Hoff
- * @modified 96/04/24 Jim Hagen : use getBackground
- */
- public class Blink extends java.applet.Applet implements Runnable {
- Thread blinker;
- String lbl;
- Font font;
- int speed;
-
- public void init() {
- font = new java.awt.Font("TimesRoman", Font.PLAIN, 24);
- String att = getParameter("speed");
- speed = (att == null) ? 400 : (1000 / Integer.valueOf(att).intValue());
- att = getParameter("lbl");
- lbl = (att == null) ? "Blink" : att;
- }
-
- public void paint(Graphics g) {
- int x = 0, y = font.getSize(), space;
- int red = (int)(Math.random() * 50);
- int green = (int)(Math.random() * 50);
- int blue = (int)(Math.random() * 256);
- Dimension d = size();
-
- g.setColor(Color.black);
- g.setFont(font);
- FontMetrics fm = g.getFontMetrics();
- space = fm.stringWidth(" ");
- for (StringTokenizer t = new StringTokenizer(lbl) ; t.hasMoreTokens() ; ) {
- String word = t.nextToken();
- int w = fm.stringWidth(word) + space;
- if (x + w > d.width) {
- x = 0;
- y += font.getSize();
- }
- if (Math.random() < 0.5) {
- g.setColor(new java.awt.Color((red + y * 30) % 256, (green + x / 3) % 256, blue));
- } else {
- g.setColor(getBackground());
- }
- g.drawString(word, x, y);
- x += w;
- }
- }
-
- public void start() {
- blinker = new Thread(this);
- blinker.start();
- }
- public void stop() {
- blinker.stop();
- }
- public void run() {
- while (true) {
- try {Thread.currentThread().sleep(speed);} catch (InterruptedException e){}
- repaint();
- }
- }
- }
-