Re: Problem in displaying components in JFrame

From:
Knute Johnson <nospam@rabbitbrush.frazmtn.com>
Newsgroups:
comp.lang.java.help
Date:
Wed, 19 Mar 2008 20:44:25 -0700
Message-ID:
<47e1a61b$0$1639$b9f67a60@news.newsdemon.com>
Lew wrote:

Alex.From.Ohio.Java@gmail.com wrote:

On Mar 19, 8:36 am, Lew <l...@lewscanon.com> wrote:

snehapshi...@gmail.com wrote:

I created a class extending JFrame
I created a frame containing several components
After making it Visible by setVisible(), I have used a timer.
When the timer expires the function returns,
But unless and until the function returns,the components on the frame
are not being displayed..
But I want them to be displayed during the timers time span.
Please Help!

Do not run the timer on the Event Dispatch Thread (EDT).

Study Swing concurrency, hard, starting here:
<http://java.sun.com/docs/books/tutorial/uiswing/concurrency/index.html>

I hypothesize, absent sufficient information from you, that your
starting
thread is waiting for the timer, and that you start it from a GUI event
handler, thus awaiting the timer in the EDT. Nothing else can happen
in the
GUI until each action completes, in this case the wait for the time
to expire.
  You have to start the timer in a separate, worker thread, and have the
worker thread update the GUI upon completion through invokeLater().

Of course, no one can help you with confidence until you actually
tell us what
the problem is. You have described the overall picture, but given us
no hard
data until you provide an example - a simple, self-contained compilable
example of source that evinces your problem.
<http://mindprod.com/jgloss/sscce.html>

Without that we're just pissing in the dark.

--
Lew


Lew:
GUI is running in another thread. That's how it's built.
You can see it with JConsole.
Or simply show current thread from any GUI event.


I have no idea what you said.

Meanwhile,
<http://mindprod.com/jgloss/sscce.html>
<http://mindprod.com/jgloss/sscce.html>
<http://mindprod.com/jgloss/sscce.html>


Subtle, I like that.

--

Knute Johnson
email s/nospam/linux/

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