code: @SuppressWarnings("unused")
  	private static void checkNotTheSame(byte[] bs, byte[] bytes) {
  		if (bs.length == bytes.length) {
  			System.out.println("same length!");
  			boolean same = true;
  			for (int i = 0; i < bs.length; i++) {
  				if (bs[i] != bytes[i]) {
  					same = false;
  					break;
  				}
  			}
  			if (same) {
  				System.out.println("same data!!");
  			}
  			else {
  				System.out.println("diff data");
  			}
  		}
  		else {
  			System.out.println("different");
  		}
  	}
docs: method useful when debugging