protected void extractPack(String in, String out) throws Exception
	   {
	     File f = new File(in);
	     FileOutputStream fostream = new FileOutputStream(out);
	     JarOutputStream jostream = new JarOutputStream(fostream);
	 
	     Pack200.Unpacker unpacker = Pack200.newUnpacker();
	     unpacker.unpack(f, jostream);
	     jostream.close();
	 
	     f.delete();
	   }