public static void extract(File zipFile,File destDir) throws IOException {
  ZipFile zf=new ZipFile(zipFile);
  try {
    extract(zf,destDir);
  }
  finally {
    zf.close();
  }
}

public static void extract ( File zipFile , File destDir ) throws IOException { ZipFile zf = new ZipFile ( zipFile ) ; try { extract ( zf , destDir ) ; } finally { zf . close ( ) ; } }
extract the contents of a zipfile to a directory .
