Here you can find the source of joinThreads()
public static void joinThreads()
//package com.java2s; /*/*w ww .ja v a2s .c o m*/ * Copyright (C) 2016 Intel Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.util.concurrent.atomic.AtomicLong; public class Main { public static AtomicLong runningThreads = new AtomicLong(0); public static void joinThreads() { while (runningThreads.get() > 0) { try { Thread.sleep(1000); } catch (InterruptedException e) { } } } }