How to make a Timer?

Question

I want to make a Timer that waits 400 MSc and then goes and prints "hi !" (e.g.). I know how to do that via javax.swing.Timer

    ActionListener action = new ActionListener()
{
    @Override
    public void actionPerformed(ActionEvent e)
    {
       System.out.println("hi!");
    }
};

plus :

    timer = new Timer(0, action);
    timer.setRepeats(false);
    timer.setInitialDelay(400);
    timer.start();

but as I know this definitely is not a good way as this kind of Timer is for Swing works. how to do that in it's correct way? (without using Thread.sleep())

What do you want to do in the end? Maybe using a job framework would be a better solution for you depending on what you need to do with it. — Chris, Jan 22 '13 at 08:13
you are true but at the end I just want to run a `Runnable`, doesn't need any complex work — Soheil, Jan 22 '13 at 08:27

score 10 · Accepted Answer · answered Jan 22 '13 at 08:19

10

Timer t = new Timer();
t.schedule(new TimerTask() {

            @Override
            public void run() {
                System.out.println("Hi!");

            }
        }, 400);

answered Jan 22 '13 at 08:19

fmodos

4,472
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score 1 · Answer 2 · answered Jan 22 '13 at 08:19

1

You can consider Quartz scheduler, it's a really scalable, easy to learn and to configure solution. You can have a look at the tutorials on the official site.
http://quartz-scheduler.org/documentation/quartz-2.1.x/quick-start

answered Jan 22 '13 at 08:19

Daniela Mogini

299
1
5
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why not using util.Timer ? – Soheil Jan 22 '13 at 08:25
1

It depends on what you have to do. If you need a complex condition involving the date, the time of the day and so on, it's better to use Quartz because it has a scheduler with great flexibility. You can establish conditions like every Wednesday of the month or every last day of the month at 12.00. It also give the possibility to repeat automatically a job more than once for example one per hour for 5 hours. On the other hand, for a simple timer, I'd use util.Timer too. – Daniela Mogini Jan 22 '13 at 08:40

score 1 · Answer 3 · edited Aug 10 '15 at 16:18

1

import java.text.SimpleDateFormat;
import java.util.Calendar;

public class currentTime {

    public static void main(String[] args) {
        Calendar cal = Calendar.getInstance();
        SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
        System.out.println( sdf.format(cal.getTime()) );
    }

}

edited Aug 10 '15 at 16:18

josliber

43,891
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answered Aug 10 '15 at 16:11

Kafi

11
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score 0 · Answer 4 · edited Jun 20 '20 at 09:12

0

TimeUnit.MILLISECONDS.sleep(150L);

is an alternative;

You could also take a look at this Question

Which suggests using a while loop which just waits or a ScheduledThreadPoolExecutor

edited Jun 20 '20 at 09:12

Community

1
1

answered Jan 22 '13 at 08:11

Moritz Roessler

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@Soheil thx for that info ;) I'm new to Java, learned sth again =) – Moritz Roessler Jan 22 '13 at 08:27

How to make a Timer?

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