Here you can find the source of getRandomTopicName()
public static String getRandomTopicName()
//package com.java2s; //License from project: Apache License import java.util.concurrent.atomic.AtomicLong; public class Main { private static AtomicLong counter = new AtomicLong(); public static String getRandomTopicName() { return "ut_topic_" + System.currentTimeMillis() + "_" + counter.addAndGet(1); }//from w w w . j a v a 2s .c o m }