怎样在这段程序中操作出控制开关的按钮

package view;
import java.applet.Applet;
import java.applet.AudioClip;
import java.io.File;
public class Music {
private AudioClip audioClip = null;
public Music(String path) {
File file = new File(path);
try {
audioClip = Applet.newAudioClip(file.toURI().toURL());
audioClip.play();
} catch (Exception e) {
e.printStackTrace();
}
}

}
public static void main(String[] args) {

String filePath = "D:\游戏\Music.wav";
new Music(filePath);
}

控制开关的按钮是指判断是否已经在播放中吗？

public static void main(String[] args) {
    String filePath = "D:\游戏\Music.wav";
    if(audioClip == null) new Music(filePath);
}