java.util.Timer

Question

if(e.getSource()==continuous)
{

    TimerTask task = new TimerTask()
    {
        public void run()
        {
            rollthedice();
        }
    };
    timer.schedule(task, java.util.Calendar.getInstance().getTime(), 500);


}

    if(e.getSource()==stop)
    {

        timer.cancel();

    }

i hit the continuous button, rollthedice() executes looping twice a second, i hit the stop button rollthedice() stops, what i been looking for is a way to hit the continuous button again after i hit stop to start looping the rollthedice() method again, the stop is to stop the continuous cycle of rollthedice() but i want to be able to hit the continuous button again, idk how to do it, i been looking and looking

Updated thoughts:

Runnable runner = new Runnable(){
    public void run()
    {
        rollthedice();
    }
}

if(e.getSource()==continuous)
{
  future = scheduler.scheduleAtFixedRate(runner, 0, 500, TimeUnit.MILLISECONDS);
}
if(e.getSource()==stop)
{

    future .cancel();

}

Per hmjd's response, create a new Timer just before calling schedule. — John B
– John B, Commented Oct 26, 2012 at 15:23

hmjd · Accepted Answer · 2012-10-26 15:20:18Z

2

From the javadoc for Timer.cancel():

Terminates this timer, discarding any currently scheduled tasks. Does not interfere with a currently executing task (if it exists). Once a timer has been terminated, its execution thread terminates gracefully, and no more tasks may be scheduled on it.

This means a new instance of Timer will be required to execute rollthedice() method again.

answered Oct 26, 2012 at 15:20

hmjd

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1 Comment

JRowan Over a year ago

what is a way to make a new instance for the loop

John B · Accepted Answer · 2012-10-31 10:37:55Z

1

You could use ScheduledThreadPoolExecutor.scheduleAtFixedRate instead. This will allow you to submit a task, cancel it and then submit again.

edited Oct 31, 2012 at 10:37

answered Oct 26, 2012 at 15:32

John B

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10 Comments

JRowan Over a year ago

i tried this i got errors i made future the Timer, scheduler and TimeUnit cannot be resolved it says

John B Over a year ago

All of those classes are part of the Java language. Did you forget to add the imports?

JRowan Over a year ago

i cut out the Timer, runner is how it is above, scheduler is the ScheduledThreadPoolExecutor, i have no future, and idk what to do to stop the scheduler, i new to this

John B Over a year ago

Post what you now have. You don't stop the scheduler, you cancel the Future.

JRowan Over a year ago

ScheduledThreadPoolExecutor scheduler; 	scheduler = new ScheduledThreadPoolExecutor(1); 	 	Runnable runner = new Runnable(){ 	    public void run() 	    { 	        rollthedice(); 	    } 	}; 	 	 	if(e.getSource()==continuous) 	{ 		 		scheduler.scheduleAtFixedRate(runner, 0, 500, TimeUnit.MILLISECONDS); 	} 	if(e.getSource()==stop) 	{  	   scheduler.shutdown();  	}

i want the stop button to stop the scheduler and then when i click continuous to start it again

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