Re: GUI not updating

"Oliver Wong" <>
Mon, 12 Jun 2006 18:13:04 GMT
"Larry Coon" <> wrote in message

At some point, my JRE apparently stopped updating the GUI
correctly. Both previously-working apps and new ones suffer
from this problem. For example, here's a SSCCE:

import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;

public class Test extends JFrame {
 private JSpinner spinner;

 public Test() {

   Container container = getContentPane();
   container.setLayout(new FlowLayout());

   spinner = new JSpinner();
   spinner.addChangeListener(new ChangeListener() {
     public void stateChanged(ChangeEvent e) {
       System.out.println("Changed to " +

   setSize(300, 300);

 public static void main(String[] args) {
   new Test();

This example works with a JSpinner, but I could have used any Swing
control (I haven't tested anything beyond Swing). What happens is
 1. Start the app.
 2. Use the "up" button to change the spinner to the next value.
    The println() shows that the value changed, but nothing happens
    in the GUI.
 3. Grab the frame and move it a little -- as soon as you move it,
    the spinner value changes to the correct value in the GUI.

As I said, it does this with all Swing controls.

This is not IDE related -- I tested that it does this compiling &
running from the command line.

I'm using XP Pro, and my Java version is:

C:\Java>java -version
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

    You above code runs properly for me as-is in Eclipse, same Java version,
also in XP Pro.

    Did you try having your GUI creation code run in the EDT? See

    - Oliver

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