private static byte[] generateInput(int size){
  Random random=new Random(285930);
  byte[] buff=new byte[size];
  random.nextBytes(buff);
  return buff;
}

private static byte [ ] generateInput ( int size ) { Random random = new Random ( 285930 ) ; byte [ ] buff = new byte [ size ] ; random . nextBytes ( buff ) ; return buff ; }
generate byte array of given size .
