为什么听不到声音？

package javaDaZuoYe;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
/*
* 添加声音 但是为什么听不到志声音？
*/
public class AudioJApplet extends JApplet implements ActionListener{
        AudioClip au;
        JButton JBstart=new JButton("Play");
        JButton JBpause=new JButton("Pause");
        
        public void init(){
                au=getAudioClip(getCodeBase(),"1.mid");
                this.setLayout(new FlowLayout());
                this.add(JBstart);
                this.add(JBpause);
                JBstart.addActionListener(this);
                JBpause.addActionListener(this);
        }
        
        public void actionPerformed(ActionEvent e){
                String cmd=e.getActionCommand();
                if(cmd.equals("Play")){
                        au.loop();
                }
                else if(cmd.equals("Pause")){
                        au.stop();
                }
               
        }
        
        public void stop(){
                au.stop();
               
        }
        
}
----------------解决方案--------------------------------------------------------
这个不应该发在J2ME版的

AudioClip是不能播MIDI的,只能播WAV,AU格式的文件
----------------解决方案--------------------------------------------------------