我想把我的java小程序中嵌入一个背景音乐，写出添加背景音乐代码。

放音乐的api网上查有很多，比如javax.sound.midi.*;
支持midi,mid背景音乐的播放
public class Music implements MetaEventListener, Runnable{
private Sequence sequence = null;
private Sequencer sequencer;
private boolean isPlaying = false;
private volatile Thread thread;

public Music(){

}
public Music(String midifile){
try {
loadMidi(midifile);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvalidMidiDataException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

//导入midi文件到内存中传给Sequence对象，相当与编码器
public void loadMidi(String filename) throws IOException, InvalidMidiDataException{

sequence = MidiSystem.getSequence(this.getClass().getResourceAsStream(filename));
}
//播放方法
public void play(){
if(isPlaying){
return;
}

try {