Re: basic GUI question

From:

Daniel Pitts <newsgroup.spamfilter@virtualinfinity.net>

Newsgroups:

comp.lang.java.programmer

Date:

Wed, 08 Jul 2009 21:17:44 -0700

Message-ID:

<Sbe5m.33613$ml7.8503@newsfe18.iad>

jrobinss wrote:

Hi all, I'm very sorry about the simplicity of this question, but I
don't seem to get around it.

First, this is what I want:
a command-line interface (CLI) program that displays a dialog asking
something from the user. The user has the choice, either answer the
graphic dialog or else type in "stop" in the CLI (which hides or
destroys the GUI).

Seems simple enough. The principle is to launch the CLI, upon
receiving command "start" launch the GUI in a separate thread, and
wait both for user input in the dialog and in CLI.

My problems, of course, stem from the famous EDT. I've taken the
opportunity to read up on it (not enough I suppose), but I still can't
get it right. Either my dialog is ok, but the CLI hangs, or the CLI
responds, but the dialog is erratic, with freezes (an behavior
described on several web sites and attributes to bad thread
management).

Question: who can give me the code? :-)

More detailed question: here are some code samples that obviously
don't work, otherwise I wouldn't be here; Any comments welcome.
Note: I've suppressed some code building the CLI, so it's not an
SSCCE. I suspect that there are enough wrongs in what I'm posting to
start correcting. If not, I'll post an SSCCE.

import javax.swing.*;
import java.awt.*;
import java.io.IOException;

/**
  * @author Daniel Pitts
  */
public class Input {

     public static void main(String...args) throws IOException {
         EventQueue.invokeLater(new Runnable() {
             public void run() {
                 JOptionPane.showConfirmDialog(null, "Config");
                 System.exit(0);
             }
         });
         System.in.read();
         System.exit(0);
     }
}

--
Daniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/>