wait notify

package com.company.bingfa;

class MLock{

}

class MyThread11 extends Thread{
    private MLock lock;

    MyThread11(MLock lock){
        this.lock = lock;
    }

    @Override
    public void run() {
        synchronized (lock) {
            System.out.println("开始线程1");

            try {
                    System.out.println("线程1开始等待");
                    lock.wait();
                    System.out.println("线程1等待结束");
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            System.out.println("结束线程1");
        }
    }
}

class MyThread12 extends Thread{
    private MLock lock;

    MyThread12(MLock lock){
        this.lock = lock;
    }

    @Override
    public void run() {
        synchronized (lock){
            System.out.println("开始线程2");

            try {
                sleep(2000);
                System.out.println("继续线程2");
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            lock.notify();
            System.out.println("结束线程2");
        }
    }
}

public class MyNotify {
    public static void main(String[] args) {
        MLock lock = new MLock();
        new MyThread11(lock).start();
        new MyThread12(lock).start();
    }
}