多线程：实现三个线程轮流打印1-100的数字

痛定思痛。 2023-09-25 17:32 64阅读 0赞

![在这里插入图片描述][4a8c516e7ad04636be88cd3078611f5f.png]

# 前言 #

*  字节跳动笔试题

public class ThreadTest02 {
        
    
        public static void main(String[] args) throws InterruptedException {
        
    
            SynchronousQueue<Integer> one2two = new SynchronousQueue<>();
            SynchronousQueue<Integer> two2three = new SynchronousQueue<>();
            SynchronousQueue<Integer> three2one = new SynchronousQueue<>();
    
            new Thread(new PrintTask(three2one, one2two)).start();
            new Thread(new PrintTask(one2two, two2three)).start();
            new Thread(new PrintTask(two2three, three2one)).start();
    
            three2one.put(1);
    
        }
    
    }
    
    class PrintTask implements Runnable {
        
    
        private SynchronousQueue<Integer> in;
        private SynchronousQueue<Integer> out;
    
        public PrintTask(SynchronousQueue<Integer> in, SynchronousQueue<Integer> out) {
        
            this.in = in;
            this.out = out;
        }
    
        @Override
        public void run() {
        
    
            try {
        
    
                long id = Thread.currentThread().getId();
    
                int data = 0;
                while (true) {
        
                    data = in.take();
                    System.out.println("当前线程：" + id + "打印数字为：" + data);
    
                    /**
                     * 下一个数字超过范围了，没必要在传递给下一个线程了
                     */
                    if (data + 1 <= 100)
                        out.put(data + 1);
    
                    /**
                     * 本线程负责打印的下一个数字，已经超过范围了，本线程可以结束了
                     */
                    if (data + 3 > 100)
                        break;
                }
    
            } catch (InterruptedException e) {
        
                e.printStackTrace();
            }
    
        }
    }

*  运行结果

![在这里插入图片描述][25a3e129987b4c40bfbb42f019b0b4f8.png]

[4a8c516e7ad04636be88cd3078611f5f.png]: https://img-blog.csdnimg.cn/4a8c516e7ad04636be88cd3078611f5f.png
[25a3e129987b4c40bfbb42f019b0b4f8.png]: https://img-blog.csdnimg.cn/25a3e129987b4c40bfbb42f019b0b4f8.png