阿森的经验宝箱: AtomicInteger打印，不需要synchronized： [code=java] import java.util.concurrent.atomic.AtomicInteger; public class Main { public static void main(String[] args) throws InterruptedException { Thread thread1 = new Thread(new MyThread(0)); Thread thread2 = new Thread(new MyThread(1)); Thread thread3 = new Thread(new MyThread(2)); thread1.start(); thread2.start(); thread3.start(); } } class MyThread implements Runnable { static AtomicInteger value = new AtomicInteger(); int order; public MyThread(int order) { this.order = order; } @Override public void run() { while (true) { int i = value.get(); if (i == 5) break; if (i % 3 == order) { System.out.println(i); value.incrementAndGet(); } } } } [/code]

Java大鹅老师: 非常好，浅显易懂

Brian551: 兄弟我的报错跟你一模一样但我是新手看不出他报错是什么意思，百度了之后看到你的贴子，按照你的方法解决了问题，谢谢你分享的方法！

HiSecret: 大佬的文章让我受益颇多！

XDarker: