多线程交替打印奇数偶数或者多线程交替打印ABC。本例中基于AtomicInteger 实现，也可以使用volatile关键字实现。

佚名 6年前 (2019-04-10) 随笔 2144人围观抢沙发百度已收录

写一个demo实现多线程交替打印ABC，同理也可实现交替打印奇数偶数等；供小伙伴们参考

 1 import java.util.concurrent.atomic.AtomicInteger;
 2 
 3 public class ThreadDemo {
 4     volatile static int count = 0;
 5     static AtomicInteger atomicInteger = new AtomicInteger(0);
 6 
 7     public static void main(String[] s) {
 8         Thread t1 = new Thread(() -> {
 9             while (true) {
10                 if (atomicInteger.get() % 3 == 0) {
11                     try {
12                         Thread.sleep(1000L);
13                     } catch (InterruptedException e) {
14                         e.printStackTrace();
15                     }
16                     System.out.println("A" + (atomicInteger.getAndIncrement()));//获取当前值并自增1 是原子操作（此处可用volatile 修饰的int 类型字段代替）
17                 }
18             }
19         });
20 
21         Thread t2 = new Thread(() -> {
22             while (true) {
23                 if (atomicInteger.get() % 3 == 1) {
24                     try {
25                         Thread.sleep(1000L);
26                     } catch (InterruptedException e) {
27                         e.printStackTrace();
28                     }
29                     System.out.println("BB" + (atomicInteger.getAndIncrement()));
30                 }
31             }
32         });
33 
34         Thread t3 = new Thread(() -> {
35             while (true) {
36                 if (atomicInteger.get() % 3 == 2) {
37                     try {
38                         Thread.sleep(1000L);
39                     } catch (InterruptedException e) {
40                         e.printStackTrace();
41                     }
42                     System.out.println("CCC" + (atomicInteger.getAndIncrement()));
43                 }
44             }
45         });
46 
47 
48         t1.start();
49         t2.start();
50         t3.start();
51     }
52 }