| //源程序清单 import java.awt.*; import java.applet.*; import java.util.*; public class Appletl extends Applet implements Runnable { AudioClip audioClip; Thread ShapeThread=null; Random RandomNumber=new Random( ); Color ImageColor; public void init( ) { audioClip=getAudioClip(getCodeBase( ), "Sample.AU");// 创建一个AudioClip对象 } public void start( ) { if (ShapeThread= =null) { ShapeThread=new Thread(this); ShapeThread.start( ); } } public void run() { while (true) { switch (RandomNumber.nextlnt(5)) { //把随机数转换为0~4之间的值 case 0: ImageColor=Color.black; break; case 1: ImageColor=Color.blue; break; case 2: ImageColor=Color.cyan; break; case3: ImageColor=Color.magenta; break; case4: ImageColor=Color.orange; break; default: ImageColor=Color.red; } try { ShapeThread.sleep(300); //线程睡眠 } catch(InterruptedException e) { //忽略异常 repaint(); } } public void paint(Graphics g) { g.setColor(ImageColor); audioClip.play(); //播放声音 switch(RandomNumber.nextlnt(2)) //获取随机数与2整除的余数 { case0:g.fillRect(25,25,200,200); //添充一个矩形 break; default:g.fillOval(25,25,200,200); //添充一个椭圆 break; } } } |
| ＜HTML＞ ＜TITLE＞Applet＜/TITLE＞ ＜APPLET CODE="Appletl.class" WIDTH=300 HEIGHT=300＞ ＜/APPLET＞ ＜/HTML＞ |