Need Help for Jar Files Operations!

Question

Hi,
I am trying to extract files from jar file using the java code. Does any one knows how can one do this using java code.
Or
is there any facility that I can use the unjar command inside the java code to extract it. I wonder about this!
Or
does java povide Java APIs provides facility for this. I have gone thourgh java.util.jar package but am not to get how can this be used for the above purpose?
Thanks.
Huzefa

Answer 1

The following will display each file in the zip/jar file to the screen.
ZipInputStream zin = new ZipInputStream( new FileInputStream( "z:\\myzip.zip" ) );
ZipEntry entry;
while( (entry = zin.getNextEntry() ) != null ) {
     System.out.println( "Entry: " + entry.toString() );
     byte[] buf = new byte[ (int)entry.getSize() ];
     zin.read( buf, 0, (int)entry.getSize() );
     System.out.write( buf, 0, (int)entry.getSize() );
Jar* extends Zip*.