线程池实现循环打印abc

本文主要是介绍线程池实现循环打印abc，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

 思路：往线程池里面不断的扔任务，每个线程获取到锁后，判断能不能打印，能则打印后释放锁，不能则直接释放锁，直到打印出100个abc后关闭线程池。

package com.example.demo.multithread;import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;public class LockDemo {static volatile int indicator = 0; // 0-a, 1-b, 2-cpublic static void main(String[] args) throws InterruptedException {Lock lock = new ReentrantLock();CountDownLatch latch = new CountDownLatch(10);Runnable ra = () -> {lock.lock();try {if (indicator == 0 && latch.getCount() > 0) {System.out.print("a");indicator = 1;}} finally {lock.unlock();}};Runnable rb = () -> {lock.lock();try {if (indicator == 1 && latch.getCount() > 0) {System.out.print("b");indicator = 2;}} finally {lock.unlock();}};Runnable rc = () -> {lock.lock();try {if (indicator == 2 && latch.getCount() > 0) {System.out.print("c" + latch.getCount() + " ");indicator = 0;latch.countDown();}} finally {lock.unlock();}};ExecutorService pool = Executors.newFixedThreadPool(13);while (latch.getCount() != 0) {pool.execute(ra);pool.execute(rb);pool.execute(rc);}pool.shutdown();}}

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