Extracting .tar files

I have the com.ice.tar package from http://www.trustice.com/java/tar/ and I have the code shown below compiling just fine. However, I need to extract .tar files and this code will only extract tar.gz files. Does anyone know what I need to change to my code to get it to extract .tar files? Thanks,
import com.ice.tar.*;
import javax.activation.*;
import java.io.*;
import java.util.zip.GZIPInputStream;
public class untarFiles
public static void main(String args[]) {
try {
untar("c:/Files/AnyFile.tar.gz",new File("c:/Files/"));
catch(Exception e) {
e.printStackTrace();
System.out.println(e.getMessage());
private static void untar(String tarFileName, File dest) throws IOException {
//assuming the file you pass in is not a dir
dest.mkdir();
//create tar input stream from a .tar.gz file
TarInputStream tin = new TarInputStream( new GZIPInputStream
( new FileInputStream(new File(tarFileName))));
//get the first entry in the archive
TarEntry tarEntry = tin.getNextEntry();
while (tarEntry != null){//create a file with the same name as the tarEntry
File destPath = new File(dest.toString() + File.separatorChar + tarEntry.getName());
if(tarEntry.isDirectory()){
destPath.mkdir();
} else {
FileOutputStream fout = new FileOutputStream(destPath);
tin.copyEntryContents(fout);
fout.close();
tarEntry = tin.getNextEntry();
tin.close();
}

hey ppl, i have the same assignment of extracting tar.Z files using java.
I have the same trustice.com library com.ice.tar
I've used basically the same code given in the previous post.
It is givin me the followin exception when i try using tar.Z files :
com.ice.tar.InvalidHeaderException: bad header in block 0 record 0, header magic is not 'ustar' or unix-style zeros, it is '-50112-51-424592-71', or (dec) -50, 112, -51, -42, 45, 92, -71
     at com.ice.tar.TarInputStream.getNextEntry(Unknown Source)
     at filterdialog.readTar(filterdialog.java:101)
     at filterdialog$1.actionPerformed(filterdialog.java:80)
     at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
     at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
     at java.awt.Component.processMouseEvent(Unknown Source)
     at javax.swing.JComponent.processMouseEvent(Unknown Source)
     at java.awt.Component.processEvent(Unknown Source)
     at java.awt.Container.processEvent(Unknown Source)
     at java.awt.Component.dispatchEventImpl(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Window.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)

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