java播放au音频程序

import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class  Music  extends Applet  implements ActionListener{
String s;
AudioClip snareHit;
AudioClip musicLoop;
public void init(){
setLayout(new FlowLayout(FlowLayout.CENTER));
Button   b1=new Button ("Play");
Button   b2=new Button ("Loop");
Button   b3=new Button ("Stop");
add(b1);
b1.addActionListener(this);
add(b2);
b2.addActionListener(this);
add(b3);
b3.addActionListener(this);
snareHit=getAudioClip(getDocumentBase(),"audio/spacemusic.au");
musicLoop=getAudioClip(getDocumentBase(),"audio/spacemusic.au");
}
public void start(){
musicLoop.play();
}
public void stop(){
musicLoop.stop();
}
public void actionPerformed(ActionEvent e) {
s=e.getActionCommand();
if(s.equals("Play")){
snareHit.play();
}
else  if(s.equals("Loop")){
musicLoop.play();
}
else  if(s.equals("Stop")){
musicLoop.stop();
snareHit.stop();
}
}
}