如何播放声音而不出现异常？

Question

I've got this class for playing sound but every time I try to use it I get a null pointer exception. This is how I'm using it:

import javax.sound.sampled.*;

public class Sound {

public Clip play(String filename) {
    Clip clip = null;

    try {
        AudioInputStream audioIn = AudioSystem.getAudioInputStream(getClass().getResource(filename));
        clip = AudioSystem.getClip();
        clip.open(audioIn);
        clip.start();
    } catch (Exception e) { e.printStackTrace(); }

    return clip;
    }

}

public Sound sound; 
sound.play("PathToFile");

Answer 1

Try:

File file = new File(filename);
this.getClass().getClassLoader().getResource(file.getPath());

Answer 2

Did you initialize the sound variable? You should do something like:

Sound sound = new Sound(); //Notice the 'new' keyword here
sound.play("PathToFile");