Why I cannot open a BigClip?

Question

Hi to everyone,
I've got a problem on using the BigClip class. Before I used it I've been working with the usual Clip class. Here's part of the code. After the debugging process I found out that the problem is when I have to get the line for the BigClip:
public BigClip sound=null;
         boolean opened=false;
       Track(String url,AudioFormat af,AudioInputStream is, String key) throws      LineUnavailableException
            info=new DataLine.Info(BigClip.class, is.getFormat(),((int)     (is.getFrameLength()*af.getFrameSize())));
            TrackLocation=url;
            try
                    sound =(BigClip) AudioSystem.getLine(info);//HERE I GET THE PROBLEM
                           sound.open(is);
                           opened=true;
                }So is that usage correct?
Thanks in advance.
Maurizio Di Vitto

Answer 1

mauriziodvt wrote:
I've tried to write a SSCCE code but i am not sure if i've done it right. .. That is a pretty good SSCCE. But not 'ideal'.
- A change that would make it even more suited to being an example is to either hot-link to a sound file available on the net, or generate one in the code. Given the size of sound files (e.g. 40Kb - several megabytes), I would recommend generating one.
For general readability, it is better to use the common forms of upper case. That means the class name should be Test rather than test. But since I put all these kinds of code in the same directory of my development box - I personally would prefer you give the class a more specific name like TestBigClip.
The other thing you should change in your test code is the Exception handling, you throw away valuable information if you do not print the stack trace. As it happens, the original problem was a NullPointerException because the code attempted to use a BigClip before it had been instantiated.
Try this code instead.
import javax.sound.sampled.*;
import java.io.*;
import org.pscode.xui.sound.bigclip.BigClip;//reference to the BigClip class
public class TestBigClip {
     public static void main(String[] args){
          BigClip sound=null;
              try{
               URL url = new URL("http://pscode.org/media/leftright.wav");
               AudioInputStream ais=AudioSystem.getAudioInputStream(url);
               AudioFormat af=ais.getFormat();
               try               
                    sound = new BigClip();
                    sound.open(ais);
                    sound.loop(1);
                    JOptionPane.showMessageDialog(null, "Close to continue..");
               catch(Exception e)
                    e.printStackTrace();
          catch(Exception e)
               e.printStackTrace();
}Note that I 'hacked' together this example, you might find missing imports etc.