synchronized

package com.company.bingfa;

class MyThread5 extends Thread{
    @Override
    public void run() {
        System.out.println(getName()+"线程开始");
        try {
            sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println(getName()+"线程结束");
    }
}

class MyThread6 extends Thread{
    private MyThread5 t;

    MyThread6(MyThread5 t){
        this.t = t;
    }

    @Override
    public void run() {
        synchronized (t){
            System.out.println(getName()+"线程开始");
            try {
                sleep(9000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(getName()+"线程结束");
        }
    }
}

public class SynchronizedTest {
    public static void main(String[] args) throws InterruptedException {
        MyThread5 t1 = new MyThread5();
        MyThread6 t2 = new MyThread6(t1);

        t2.start();
        t1.start();
        t1.join();

        System.out.println(Thread.currentThread().getName()+"线程结束");

        /*
            Thread-0线程开始
            Thread-1线程开始
            Thread-0线程结束
            Thread-1线程结束
            main线程结束
         */
    }
}