The Java Boutique: Java Tutorial: Java by Example: Letters - Words - Lines - Shuffle

import java.awt.*; import java.applet.*; public class Project37 extends Applet implements Runnable { Thread runner; Image Buffer; Graphics gBuffer; String alphabet="ABCDEFGHIJKLMNOPQRSTUVWXYZ"; int ticker; public void init() { //create graphics buffer, the size of the applet Buffer=createImage(size().width,size().height); gBuffer=Buffer.getGraphics(); } public void start() { if (runner == null) { runner = new Thread (this); runner.start(); } } public void stop() { if (runner != null) { runner.stop(); runner = null; } } public void run() { while(true) { try {runner.sleep(50);} catch (Exception e) { } repaint(); } } public void drawStuff() { //repaint background after 20 seconds if(ticker==0) { gBuffer.setColor(Color.black); gBuffer.fillRect(0,0,size().width,size().height); } ticker++; if(ticker>400) ticker=0; //random font size 10..50 int fontSize=(int)(Math.random()*40)+10; //random font color int red=(int)(Math.random()*255); int green=(int)(Math.random()*255); int blue=(int)(Math.random()*255); gBuffer.setColor(new Color(red, green, blue)); //random coordinates within the applet bounderies int x=(int)(Math.random()*size().width); int y=(int)(Math.random()*size().height); //random substring from the alphabet string (one out of 26 characters) int character=(int)(Math.random()*26); String s=alphabet.substring(character, character+1); gBuffer.setFont(new Font("TimesRoman", Font.PLAIN, fontSize)); gBuffer.drawString(s,x,y); } public void update(Graphics g) { paint(g); } public void paint(Graphics g) { drawStuff(); g.drawImage (Buffer,0,0, this); } }