Applet / Application Sound problem

Question

Hey everyone,
I'm programming a game named None Left, and the main file (NoneLeft.java) contains a constructor :
public class NoneLeft extends javax.swing.JApplet implements Runnable, ContextListenerIt also contains a main method:
    public static void main(String s[]) {
        JFrame f = new JFrame("NoneLeft");
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {System.exit(0);}
        JApplet applet = new NoneLeft();
        f.getContentPane().add("Center", applet);
        applet.init()        f.pack();
        f.setSize(new Dimension(800,600));
        f.setVisible(true);
AudioClip music;
music = applet.getAudioClip(new URL("file:///K:/BinaryFinary2.wav"));
music.loop();The problem is that whenever I try to use the applet's method getAudioClip,
i get the following error:
Exception in thread "main" java.lang.NullPointerException
        at java.applet.Applet.getAppletContext(Applet.java:187)
        at java.applet.Applet.getAudioClip(Applet.java:295)
        at noneleft.NoneLeft.main(NoneLeft.java:865)The code at line 865 is:
music = applet.getAudioClip(new URL("file:///K:/BinaryFinary2.wav"));
music.loop();The NullPointerException is really what has me puzzled. The applet is there: It's created in the public static void main method, but it just won't work. Anyone have a clue about why that is?
I have a feeling it's because of the Applet inheritance and the application; it's not sure which one is which...or maybe not.
Thanks so much!
Edited by: simpavid on May 27, 2008 4:11 PM

Answer 1

Thank you so much for your help so far;
However, I still haven't gotten this to work.
I now have the code:
JFrame f = new JFrame("NoneLeft");
JApplet applet = new NoneLeft();
f.getContentPane().add("Center", applet);
applet.init();
f.pack();
f.setSize(new Dimension(800,600));
f.setVisible(true);
AudioClip music = applet.getAudioClip(applet.getCodeBase(), "BinaryFinary.wav");
music.loop();but my error still exists:
Exception in thread "main" java.lang.NullPointerException
        at java.applet.Applet.getCodeBase(Applet.java:152)
        at noneleft.NoneLeft.main(NoneLeft.java:861)The strange part is that getAudioClip no longer gives me a null pointer but getCodeBase() does. I also tried getDocumentBase() and it gives me an error. I'm wondering if this has to do with the fact that this is called on an applet from a main method? The applet is instantiated as a NoneLeft object, which extends JApplet, so that shouldn't be the problem. Do you have a clue on how to fix that?
Again, thanks so much for the help.