//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;
}
}
} |
