java--多线程之后台线程

public class ThreadDaemon {
    /**
     * @param args
     * 后台线程在主进程结束后，也会退出
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        ThreadImplementsTest tlt=new ThreadImplementsTest();
        Thread t1=new Thread(tlt);
        t1.setName("Daemon Thread test");
        t1.setDaemon(true);//如果一个进程中只用后台线程在运行，那么整个进程就会结束。
        t1.start();
    }
}

Output:

exit
Daemon Thread test====>进入loop()
0

 

 

public class ThreadImplementsTest implements Runnable{
    
    public void loop(){
        String name=Thread.currentThread().getName();
        System.out.println(name+"====>进入loop()");
        for (int i = 0; i < 10; i++) {
            try {
                System.out.println(i);
                Thread.sleep(200);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                System.out.println(e.getLocalizedMessage());
                System.out.println(e.getMessage());
                e.printStackTrace();
            }
        }
        System.out.println(name+"=============>离开Loop");
    }
    

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        ThreadImplementsTest tst=new ThreadImplementsTest();
        tst.run();
        
        try {
            Thread.sleep(100);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        tst.loop();
    }

    public void run() {
        // TODO Auto-generated method stub
        loop();
    }
}