Java多线程：用三个线程控制循环输出10次ABC

 1 package com.thread;
 2 
 3 import java.util.concurrent.locks.Lock;
 4 import java.util.concurrent.locks.ReentrantLock;
 5 
 6 public class ABC {
 7     private static int state = 0;
 8 
 9     public static void main(String[] args) {
10         final Lock l = new ReentrantLock();
11         
12         Thread A = new Thread(new Runnable(){
13             @Override
14             public void run() {
15                 while (state<=30) {
16                     l.lock();
17                     if(state%3==0){
18                         System.out.println("A");
19                         state ++;
20                     }
21                     l.unlock();
22                 }
23             }
24         });
25         Thread B = new Thread(new Runnable(){
26             @Override
27             public void run() {
28                 while (state<=30) {
29                     l.lock();
30                     if(state%3==1){
31                         System.out.println("B");
32                         state ++;
33                     }
34                     l.unlock();
35                 }
36             }
37         });
38         Thread C = new Thread(new Runnable(){
39             @Override
40             public void run() {
41                 while (state<=30) {
42                     l.lock();
43                     if(state%3==2){
44                         System.out.println("C");
45                         state ++;
46                     }
47                     l.unlock();
48                 }
49             }
50         });
51         A.start();
52         B.start();
53         C.start();
54     }
55 
56 }