Groups > comp.lang.java.programmer > #30402

Re: Could this be done better

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From	Cecil Westerhof <Cecil@decebal.nl>
Newsgroups	comp.lang.java.programmer
Subject	Re: Could this be done better
Organization	Decebal Computing
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Op Monday 24 Nov 2014 19:42 CET schreef Eric Sosman:

>>> - Use javax.swing.Timer instead of java.util.Timer.  The
>>> mechanics are a bit different -- you write an ActionListener
>>> instead of subclassing TimerTask -- but the action listener
>>> automatically runs on the EDT, where it's safe to manipulate
>>> your GUI.
>>
>> Or is there a reason why did would be better?
>
> (Shrug.)  For your purpose I don't see much difference.
> But suppose you wanted to add a few more buttons to your GUI:
>
> 	"Next colour"
> 	"Previous colour"
> 	"Start cycling"
> 	"Stop cycling"
>
> You'll need an ActionListener for the "Next colour" button,
> and with javax.swing.Timer you could re-use that exact same
> ActionListener for cycling.  Essentially, the Timer would fire
> the same kind of events the button does, and they'd be handled
> by the same chunk of code.
>
> The JavaDoc for javax.swing.Timer mentions another possible
> advantage: If you have a *lot* of timed activity in your GUI,
> you might wind up creating a *lot* of java.util.Timer threads if
> you weren't careful.  With javax.swing.Timer that's not an issue;
> javax.swing.Timer "multiplexes" all the different events on a
> single internal thread.  FWIW, I myself have never created so
> many Timers (of either kind) that thread multiplicity ever began
> to become a problem, but, hey ...
>
> An even more flexible and feature-ridden alternative would be
> to use java.util.concurrent.ScheduledThreadPoolExecutor.

Looks like I have some experimenting to do. :-D

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

Thread

Could this be done better Cecil Westerhof <Cecil@decebal.nl> - 2014-11-24 12:16 +0100
  Re: Could this be done better "Qu0ll" <Qu0llSixFour@gmail.com> - 2014-11-24 22:49 +1100
    Re: Could this be done better Cecil Westerhof <Cecil@decebal.nl> - 2014-11-24 17:54 +0100
      Re: Could this be done better Knute Johnson <eternal@knutejohnson.com> - 2014-11-24 09:37 -0800
        Re: Could this be done better Cecil Westerhof <Cecil@decebal.nl> - 2014-11-24 19:27 +0100
  Re: Could this be done better Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-11-24 09:23 -0500
    Re: Could this be done better Cecil Westerhof <Cecil@decebal.nl> - 2014-11-24 17:45 +0100
      Re: Could this be done better Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-11-24 13:42 -0500
        Re: Could this be done better Cecil Westerhof <Cecil@decebal.nl> - 2014-11-25 00:12 +0100
    Re: Could this be done better Knute Johnson <eternal@knutejohnson.com> - 2014-11-24 09:19 -0800
      Re: Could this be done better Knute Johnson <eternal@knutejohnson.com> - 2014-11-24 09:41 -0800
        Re: Could this be done better Cecil Westerhof <Cecil@decebal.nl> - 2014-11-25 00:55 +0100
      Re: Could this be done better Cecil Westerhof <Cecil@decebal.nl> - 2014-11-25 00:11 +0100
        Re: Could this be done better Knute Johnson <eternal@knutejohnson.com> - 2014-11-24 16:26 -0800
  Re: Could this be done better Brixomatic <brixomatic@yahoo.com> - 2014-11-25 19:58 +0100
    Re: Could this be done better Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-11-25 14:36 -0500
      Re: Could this be done better Brixomatic <brixomatic@yahoo.com> - 2014-11-26 01:58 +0100
        Re: Could this be done better Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-11-26 08:48 -0500
          Re: Could this be done better Brixomatic <brixomatic@yahoo.com> - 2014-11-29 19:43 +0100
            Re: Could this be done better Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-11-29 15:44 -0500
              Re: Could this be done better Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-11-29 15:47 -0500

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