AudioInputStream -- 'skip()' method seems not to work

I am using AudioInputStream and I find that the 'skip()' method seems not to
work. The thing 'executes' without a murmur, returning a value as if doing
the skip, but in fact nothing gets skipped. Code is:

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Line2D;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
import java.util.Vector;
import java.util.Enumeration;
import java.io.*;
import javax.sound.sampled.*;
import java.awt.font.*;
import java.text.*;

..
..
..
..

 AudioFormat format = getFormat();
 AudioInputStream playbackInputStream =
      AudioSystem.getAudioInputStream(format, audioInputStream);

 DataLine.Info info = new DataLine.Info(SourceDataLine.class,
      format);
 if (!AudioSystem.isLineSupported(info)) {
      System.out.println("Line matching " + info + " not supported.");
      return;
 }

 try {
      line = (SourceDataLine) AudioSystem.getLine(info);
      line.open(format, bufSize);
}

catch (LineUnavailableException ex) {
      System.out.println("Unable to open the line: " + ex);
      return;
}

int frameSizeInBytes = format.getFrameSize();
int bufferLengthInFrames = line.getBufferSize() / 8;
int bufferLengthInBytes = bufferLengthInFrames * frameSizeInBytes;
byte[] data = new byte[bufferLengthInBytes];
int numBytesRead = 0;

// start the source data line
line.start();

int j = 0;
try {
!!!!!!HERE IS
SKIP!!!!!!!!System.out.println(""+playbackInputStream.skip(1000));
}
catch (Exception e) {
   System.out.println(e);
}
while (j<1000) {
   j++;
   try {

      if ((numBytesRead = playbackInputStream.read(data)) == -1) {
          break;
      }
      int numBytesRemaining = numBytesRead;
      while (numBytesRemaining > 0 ) {
          numBytesRemaining -= line.write(data, 0, numBytesRemaining);
      }
   } catch (Exception e) {
      System.out.println("Error during playback: " + e);
      break;
   }
 }

thanks,

tom arnall
north spit, ca

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