java 音乐播放问题（Applet）

[zhihuawu39]

我在应用程序中添加了音乐播放功能，播放第一首的时候可以播放。当我换成其他的就再也不能播放了，而且两首音乐格式是一样的，感觉不是程序本身的问题，但是就是播放不了，一下是我的代码，希望高手帮帮忙！在此先谢啦！
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.io.*;
import java.net.*;
//创建棋盘类
class ChessPad extends Panel implements MouseListener,ActionListener,Runnable
{
Thread thread=new Thread();
AudioClip clip;
URL url;
String kai="开",guan="关";
int x=-1,y=-1,Qizicolor=1;
Button button=new Button("重新开局");
Panel panel=new Panel();
Label label=new Label("音乐");
Button box=new Button("开");
TextField text_1=new TextField("请黑棋下子"),
text_2=new TextField();
public void run()
{
try{
File file=new File("KissTherain.wav");
url=file.toURL();
clip=Applet.newAudioClip(url);
}
catch(Exception e)
{
System.out.println(e);
} }
ChessPad()
{
setSize(440,440);
setLayout(null);setBackground(Color.orange);
addMouseListener(this);add(button);button.setBounds(10,5,60,26);
button.addActionListener(this);
panel.add(label);
panel.add(box);
add(panel);
box.addActionListener(this);
panel.setBounds(220, 5,90,24);
add(text_1);text_1.setBounds(90,5,90,24);
add(text_2);text_2.setBounds(320,5,90,24);
text_1.setEditable(false);
text_2.setEditable(false);
}
public void paint(Graphics g)
{
for(int i=40;i<=380;i=i+20)
{
g.drawLine(40,i,400,i);
}
g.drawLine(40,400,400,400);
for(int j=40;j<=380;j=j+20)
{
g.drawLine(j,40,j,400);
}
g.drawLine(400,40,400,400);
g.fillOval(97,97,6,6);g.fillOval(337,97,6,6);
g.fillOval(237,217,6,6);
}

public void mousePressed(MouseEvent e)
{
if(e.getModifiers()==InputEvent.BUTTON1_MASK)
{
x=(int)e.getX();y=(int)e.getY();
ChessPoint_black chesspoint_black=new ChessPoint_black(this);
ChessPoint_white chesspoint_white=new ChessPoint_white(this);
int a=(x+10)/20,b=(y+10)/20;
if(((x/20)<2)||((y/20)<2)||((x/20)>19)||(y/20)>19)
{
}
else
{
if(Qizicolor==1)
{
this.add(chesspoint_black);
chesspoint_black.setBounds(a*20-10,b*20-10,20,20);
Qizicolor=Qizicolor*(-1);
text_2.setText("请白棋下子");
text_1.setText("");
}
else if(Qizicolor==-1)
{
this.add(chesspoint_white);
chesspoint_white.setBounds(a*20-10,b*20-10,20,20);
Qizicolor=Qizicolor*(-1);
text_1.setText("请黑棋下子");
text_2.setText("");
}
}
}
}
public void mouseReleased(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseClicked(MouseEvent e){}
public void actionPerformed(ActionEvent e)
{
if(!(thread.isAlive()))
{
thread=new Thread(this);
}
try{thread.start();}

catch(Exception ee){}
if(e.getSource()==button)
{
this.removeAll();Qizicolor=1;
panel.add(label);
panel.add(box);
add(panel);
panel.setBounds(220, 5, 100, 24);
add(button);button.setBounds(10,5,60,26);
add(text_1);text_1.setText("请黑棋下子");
text_1.setBounds(90,5,90,24);
add(text_2);text_2.setText("");
text_2.setBounds(290,5,90,24);
}
else if(e.getSource()==box)
{
if(box.getLabel()==kai)
{
clip.loop();
box.setLabel("关");
}
else if(box.getLabel()==guan)
{
clip.stop();
box.setLabel("开");
}
}
}
}
//负责创建黑色棋子的类：
class ChessPoint_black extends Canvas implements MouseListener
{
ChessPad chesspad=null;
ChessPoint_black(ChessPad p)
{
setSize(20,20);chesspad=p;
addMouseListener(this);
}
public void paint(Graphics g)
{
g.setColor(Color.black);
g.fillOval(0,0,20,20);
}
public void mousePressed(MouseEvent e)
{
if(e.getModifiers()==InputEvent.BUTTON3_MASK)
{
chesspad.remove(this);
chesspad.Qizicolor=1;
chesspad.text_2.setText("");chesspad.text_1.setText("请黑棋下子");
}
}
public void mouseReleased(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseClicked(MouseEvent e)
{
if(e.getClickCount()>=2)
chesspad.remove(this);
}
}
//负责创建白色棋子的类：
class ChessPoint_white extends Canvas implements MouseListener
{
ChessPad chesspad=null;
ChessPoint_white(ChessPad p)
{
setSize(20,20);chesspad=p;
addMouseListener(this);
}
public void paint(Graphics g)
{
g.setColor(Color.white);
g.fillOval(0,0,20,20);
}
public void mousePressed(MouseEvent e)
{
if(e.getModifiers()==InputEvent.BUTTON3_MASK)
{
chesspad.remove(this);
chesspad.Qizicolor=1;
chesspad.text_2.setText("");chesspad.text_1.setText("请白棋下子");
}
}
public void mouseReleased(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseClicked(MouseEvent e)
{
if(e.getClickCount()>=2)
chesspad.remove(this);
}
}
public class Chess extends Frame
{
ChessPad chesspad=new ChessPad();
Chess()
{
setVisible(true);
setLayout(null);
Label label=new Label("单击左键下棋子，双击吃棋子，用右键单击棋子悔棋",Label.CENTER);
add(label);label.setBounds(70,55,440,26);
label.setBackground(Color.orange);
add(chesspad);chesspad.setBounds(70,90,440,440);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
pack();
setSize(600,550);
}
public static void main(String args[])
{
Chess chess=new Chess();
}

[zhihuawu39]

郁闷，我错了！是我自己没把另外那首音乐放入JAVA文档的文件夹里面！低级错误！