java 多线程（daemon）

package com.example;

public class App {

    public static void main(String[] args) {

        DoDaemon d1 = new DoDaemon();
        DoRunnable d2 = new DoRunnable("Sinny");

        Thread t1 = new Thread(d1);
        Thread t2 = new Thread(d2);
        //设置为后台线程，
        t1.setDaemon(true);

        t1.start();
        t2.start();//用户线程结束后，JVM自动退出，不再等待后台进程
    }
}

package com.example;

public class DoDaemon implements Runnable{
    @Override
    public void run() {
        for (int i = 0; i < 300; i++) {
            try {
                Thread.sleep(5);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            System.out.println("Hello__Deamon");
        }
    }
}

package com.example;

public class DoRunnable implements Runnable {

    private String name;

    public DoRunnable(String name) {
        this.name = name;
    }

    @Override
    public void run() {
        for (int i = 0; i < 3; i++) {
            try {
                Thread.sleep(5);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            System.out.println("Hello__" + this.name);
        }
    }
}