import java.util.Timer;

import java.util.TimerTask;

public class TimerTaskDemo{

public static void main(String[] args){

Timer timer = new Timer(true); // daemon task-execution thread

timer.schedule(new TimerTask(){

@Override

public void run(){

System.out.println("one-shot timer task executing.");

}

}, 2000);

System.out.println("main thread is sleeping for 4 seconds.");

try{

Thread.sleep(4000);

}catch(InterruptedException ie){

ie.printStackTrace();

}

System.out.println("main thread has woken up.");

timer = new Timer(); // not daemon thread by default.

timer.schedule(new TimerTask(){

int i;

@Override

public void run(){

System.out.println("repeated timer task is running.");

if(++i == 6){

System.out.println("canceling repeated timer task: " + cancel());

System.out.println("canceled");

System.exit(0); // exit the application with force because that Timer is not canceled yet.

}

}

}, 2000, 500);

System.out.println("main thread is terminating.");

}

}