java编程播放midi音乐

package test;

import javax.sound.midi.*;
import javax.sound.sampled.*;
import java.io.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: SinoSoft</p>
 * @author pete
 * @version 1.0
 */

public class PlayMidi implements Runnable{
File sound;
Sequence seq;
Sequencer midi;
Thread runner;
public PlayMidi(String f){
  try {
   sound=new File(f);
   seq=MidiSystem.getSequence(sound);
   midi=MidiSystem.getSequencer();
   midi.open();
   midi.setSequence(seq);
  }
  catch (Exception ex) {
  }
}

public void run(){
  try {
   while(true){
if(!midi.isRunning())midi.start();
Thread.sleep(1000);
   }
  }
  catch (Exception ex) {
   ex.printStackTrace();
  }
}
public void playMidi(){
  try
  {
   //midi.start();
   if(runner==null){
runner=new Thread(this);
runner.start();
   }
  }
  catch (Exception ex)
  {
  }
}
public void stopMidi(){
  try
  {
   runner.stop();
   runner=null;
   midi.stop();
  }
  catch (Exception ex)
  {
  }
}

public static void main(String[] args)
{
  PlayMidi playMidi1 = new PlayMidi("mytest.mid");
  playMidi1.playMidi();
  playMidi1.stopMidi();
}
}