多线程wait和notify实现1212

Posted 2020-11-08 wujf

package threadT;

public class ThreadMain {
    public static void main(String args[]) {
        final Object obj = new Object();// 以该对象为共享资源
        new Thread(new Thread1to2(1, obj), "小明").start();
        new Thread(new Thread1to2(2, obj), "小王").start();
    }
}

package threadT;

public class Thread1to2 implements Runnable {
    private final int number;
    private int count = 10;
    public Object obj;

    public Thread1to2(int number, Object obj) {
        this.obj = obj;
        this.number = number;
    }

    public void run() {
        synchronized (obj) {
            while (count-- > 0) {
                try {
                    obj.notify();// 唤醒等待res资源的线程，把锁交给线程（该同步锁执行完毕自动释放锁）
                    System.out.println(Thread.currentThread().getName() + "喊:" + number);
                    if (count > 0)
                        obj.wait();// 释放CPU控制权，释放res的锁，本线程阻塞，等待被唤醒。
                    // 如果结束要释放锁，否则会阻塞进程
                    else if (count == 0)
                        obj.notify();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}