java多线程快速入门

Posted 2021-01-22 cppdy

什么是守护线程

　　守护线程是为用户线程服务的这么一个线程，主线程结束，守护线程也结束

package com.cppdy;

class MyThread3 extends Thread{

    @Override
    public void run() {
        System.out.println("开始执行线程");
        try {
            sleep(1000);
        } catch (Exception e) {
            
        }
        System.out.println("结束执行线程");
    }
    
}

public class ThreadDemo3 {

    public static void main(String[] args) throws Exception{
        MyThread3 mt = new MyThread3();
        //设置守护线程
        mt.setDaemon(true);
        mt.start();
        Thread.sleep(500);
    }

}