Thread.run方法是同步方法

时间:2021-09-06 06:56:15

Thread.run方法是同步方法,

线程:

package com.stono.thread.page005;

public class MyThread extends Thread {

    @Override
    public void run() {
        super.run();
        System.out.println("MyThread");
    }
}

调用:

package com.stono.thread.page005;

public class Run {

    public static void main(String[] args) {
        MyThread myThread = new MyThread();
//        myThread.start(); // start是异步的,通常会在main的打印之后执行
//        myThread.start(); // 多次调用start会有IllegalThreadStateException异常
        myThread.run();  // run是同步方法,会在main的打印之前执行
        System.out.println("运行结束!");
    }

}

 修改线程类:

package com.stono.thread.page005;

public class MyThread extends Thread {

    @Override
    public void run() {
        super.run();
        System.out.println("MyThread:"+this.currentThread().getName());
    }
}

发现run方法其实是main Thread调用的,所以就是同步的方法;