Java tutorial
//package com.java2s; import java.util.Random; public class Main { private static Random random = new Random(); public static String generateRandomUTDID() { StringBuffer localStringBuffer = new StringBuffer(); int i = 0; while (i < 24) { localStringBuffer.append((char) (random.nextInt(25) + 65)); i += 1; } return localStringBuffer.toString(); } }