Java tutorial
//package com.java2s; //License from project: Apache License import java.util.UUID; public class Main { private static final String b = String.format("0000%4s-0000-1000-8000-00805f9b34fb", new Object[] { "...." }); public static String parseUUID(UUID uuid) { String s = uuid.toString(); if (s.matches(b)) { s = s.substring(4, 8); } return s; } }