code: public static String get(byte[] bytes, int from, int to) {
          final StringBuilder bld = new StringBuilder();
          for (int i = from; i < to; i++) {
              bld.append(Hex.get(bytes[i]));
          }
          return bld.toString();
      }
docs: Gets hex string corresponding to the given byte array from "<tt>from</tt>" position to "<tt>to's</tt>"
  
  @param bytes bytes.
  @param from from position.
  @param to to position.
  @return hex string.