三个线程交替打印1-100

Myth丶恋晨 2024-04-18 15:07 60阅读 0赞

package xyz.coolblog.ti;
    
    /**
     * @Auther: miv
     * @Date: 2019-09-08 16:34
     * @Web: www.xiejx.cn
     * @Email: 787824374@qq.com
     * @Description:
     */
    public class Test {
        
        volatile int i = 1;
    
        public static void main(String[] args) throws Exception {
        
            Test obj = new Test();
    
    
            Runnable runnable = new Runnable() {
        
                @Override
                public void run() {
        
                    while (obj.i <= 100) {
        
                        // 上锁当前对象
                        synchronized (this) {
        
    
                            // 唤醒另一个线程
                            notifyAll();
                            if (obj.i == 101) {
        
                                return;
                            }
    
                            int i = new Integer(Thread.currentThread().getName());
                            if (obj.i % 3 == i) {
        
                                System.out.println("Thread " + Thread.currentThread().getName() + " " + obj.i++);
                            }
                            if(obj.i % 3==1){
        
                                System.out.println("==========");
                            }
                            try {
        
                                if (obj.i == 101) {
        
                                    notifyAll();
                                    return;
                                } else {
        
                                    // 释放掉锁
                                    wait();
                                }
                            } catch (Exception e) {
        
                                e.printStackTrace();
                            }
                        }
                    }
                }
            };
    
            // 启动多个线程（想创建几个就创建几个）
            Thread t1 = new Thread(runnable);
            Thread t2 = new Thread(runnable);
            Thread t3 = new Thread(runnable);
    
            t1.setName("1");
            t2.setName("2");
            t3.setName("0");
            t1.start();
            t2.start();
            t3.start();
    
    
        }
    
    
    }

运行结果

Thread 1 1
    Thread 2 2
    Thread 0 3
    ==========
    Thread 1 4
    Thread 2 5
    Thread 0 6
    ==========
    Thread 1 7
    Thread 2 8
    Thread 0 9
    ==========
    Thread 1 10
    Thread 2 11
    Thread 0 12
    ==========
    Thread 1 13
    Thread 2 14
    Thread 0 15
    ==========
    Thread 1 16
    Thread 2 17
    Thread 0 18
    ==========
    Thread 1 19
    Thread 2 20
    Thread 0 21
    ==========
    Thread 1 22
    Thread 2 23
    Thread 0 24
    ==========
    Thread 1 25
    Thread 2 26
    Thread 0 27
    ==========
    Thread 1 28
    Thread 2 29
    Thread 0 30
    ==========
    Thread 1 31
    Thread 2 32
    Thread 0 33
    ==========
    Thread 1 34
    Thread 2 35
    Thread 0 36
    ==========
    Thread 1 37
    Thread 2 38
    Thread 0 39
    ==========
    Thread 1 40
    Thread 2 41
    Thread 0 42
    ==========
    Thread 1 43
    Thread 2 44
    Thread 0 45
    ==========
    Thread 1 46
    Thread 2 47
    Thread 0 48
    ==========
    Thread 1 49
    Thread 2 50
    Thread 0 51
    ==========
    Thread 1 52
    Thread 2 53
    Thread 0 54
    ==========
    Thread 1 55
    Thread 2 56
    Thread 0 57
    ==========
    Thread 1 58
    Thread 2 59
    Thread 0 60
    ==========
    Thread 1 61
    Thread 2 62
    Thread 0 63
    ==========
    Thread 1 64
    Thread 2 65
    Thread 0 66
    ==========
    Thread 1 67
    Thread 2 68
    Thread 0 69
    ==========
    Thread 1 70
    Thread 2 71
    Thread 0 72
    ==========
    Thread 1 73
    Thread 2 74
    Thread 0 75
    ==========
    Thread 1 76
    Thread 2 77
    Thread 0 78
    ==========
    Thread 1 79
    Thread 2 80
    Thread 0 81
    ==========
    Thread 1 82
    Thread 2 83
    Thread 0 84
    ==========
    Thread 1 85
    Thread 2 86
    Thread 0 87
    ==========
    Thread 1 88
    Thread 2 89
    Thread 0 90
    ==========
    Thread 1 91
    Thread 2 92
    Thread 0 93
    ==========
    Thread 1 94
    Thread 2 95
    Thread 0 96
    ==========
    Thread 1 97
    Thread 2 98
    Thread 0 99
    ==========
    Thread 1 100
    
    Process finished with exit code 0