CyclicBarrier
package com.miracle.study.concurrent; import java.util.concurrent.BrokenBarrierException; import java.util.concurrent.CyclicBarrier; /** * @author Miracle * @date 2021/4/14 19:42 */ public class CyclicBarrierTest { static class Task1 implements Runnable{ public CyclicBarrier cyclicBarrier; /** * 运算次数 */ public int num; /** * 任务名称 */ private String name; public Task1(CyclicBarrier cyclicBarrier, int num, String name){ this.cyclicBarrier = cyclicBarrier; this.num = num; this.name = name; } @Override public void run() { while (num != 0){ try { System.out.println("run " + this.name); Thread.sleep(100); System.out.println("stop " + this.name); // 阻塞等待其他线程完成任务 cyclicBarrier.await(); // 次数减一 num--; } catch (InterruptedException e) { e.printStackTrace(); } catch (BrokenBarrierException e) { e.printStackTrace(); } } } } public static void main(String[] args) { CyclicBarrier cyclicBarrier = new CyclicBarrier(4, () -> { // 所有任务完成后,会调用这个任务,然后所有线程继续执行。 System.out.println("Check task completion"); }); new Thread(new Task1(cyclicBarrier, 10, "task01")).start(); new Thread(new Task1(cyclicBarrier, 10, "task02")).start(); new Thread(new Task1(cyclicBarrier, 10, "task03")).start(); new Thread(new Task1(cyclicBarrier, 10, "task04")).start(); } }