code: public static String generateRandomId() {
  
          StringBuffer buffer = new StringBuffer();
          int base = 36;
          for (int i = 0; i < 16; i++) {
              buffer.append(Integer.toString(RANDOM.nextInt(base), base));
          }
          return buffer.toString();
      }
docs: Generates a random id.<p>
  
  @return the random id