java Swing 播放背景音乐

1. import java.io.FileNotFoundException;  
2. import java.io.IOException;  
3. import java.net.URL;  
4. import sun.audio.AudioData;  
5. import sun.audio.AudioPlayer;  
6. import sun.audio.AudioStream;  
7. import sun.audio.ContinuousAudioDataStream;  
8.   
9. public class MusicPlay {  
10.     private AudioStream as; // 单次播放声音用  
11.     ContinuousAudioDataStream cas;// 循环播放声音  
12.   
13.     // 构造函数  
14.     public MusicPlay(URL url) {  
15.         try {  
16. <