关于应用程序下用 AudioClip播放音乐的问题

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
import java.applet.*;
public class music extends JFrame implements ActionListener
{
private JButton play=new JButton('Play');
private JButton stop=new JButton('Stop');
private JPanel outer=new JPanel();
AudioClip clip;

public music()
{
super('music');
Container container=getContentPane();
outer.setBackground(Color.white);
outer.setLayout(null);
container.add(outer);
outer.add(play);
outer.add(stop);//一定要放在setsize之前
play.setBounds(30,350,60,30);
stop.setBounds(30,400,60,30);
setSize(500,520);
setVisible(true);
setResizable(false);
play.addActionListener(this);
stop.addActionListener(this);
}

public void actionPerformed(ActionEvent e)
{
if(e.getSource()==play)
{
try
{
File file=new File('001001.mid');
clip=Applet.newAudioClip(file.toURL());
clip.loop();
}catch(MalformedURLException ex){}
}
else if(e.getSource()==stop)
{
clip.stop();
}
}
public static void main(String args[])
{
music app=new music();
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}"