java TimerTask example

Question

I need to execute a thread at a regular interval of time. I am using timerTask method in my java program

public class StudentDTO  extends  TimerTask{
@Override
public void run(){  
    System.out.println("hi");
}
        public static void main(String[] args){ 

    StudentDTO t1=new StudentDTO();  
    Timer timer = new Timer(true);
    timer.scheduleAtFixedRate(t1, 0, 10000);
    System.out.println("start");

     try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

}

}

when i executed this code,I got answer like

start hi hi

and the program will get terminated. I have to run a thread at each 10 sec.Please suggest me a solution

Answer 1

将new Timer(true)更改为new Timer()否则它是一个守护程序线程，并且在主退出时应用程序死亡

Answer 2

The Java Virtual Machine exits when the only threads running are all daemon threads.

So change to

 Timer timer = new Timer();

This will create a user Thread

Answer 3

There are two ways you can make your program run every 10 seconds.

1. Timer timer=new Timer();

2. By changing the time you have for thread to sleep. It should be more than or equal to the interval you want to schedule your task.For Instance,

     try { Thread.sleep(12000); } catch (InterruptedException e) { e.printStackTrace(); }