FULL PRODUCT VERSION :
java version "1.5.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_01-b08)
Java HotSpot(TM) Client VM (build 1.5.0_01-b08, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Windows 2000 SP4

A DESCRIPTION OF THE PROBLEM :
Resizing JFrame with JProgressBar to zero by dragging a border cause an IllegalArgumentException exception in BasicStroke object constructor...

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run an example.
drag a bottom side of the frame up to minimize it to header only.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No exception.
ACTUAL -
Failed to paint so some artifacts occur

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: negat
ive width
        at java.awt.BasicStroke.<init>(BasicStroke.java:181)
        at javax.swing.plaf.basic.BasicProgressBarUI.paintDeterminate(BasicProgr
essBarUI.java:596)
        at javax.swing.plaf.metal.MetalProgressBarUI.paintDeterminate(MetalProgr
essBarUI.java:45)
        at javax.swing.plaf.basic.BasicProgressBarUI.paint(BasicProgressBarUI.ja
va:352)
        at javax.swing.plaf.ComponentUI.update(ComponentUI.java:142)
        at javax.swing.JComponent.paintComponent(JComponent.java:740)
        at javax.swing.JComponent.paint(JComponent.java:1003)
        at javax.swing.JComponent.paintChildren(JComponent.java:840)
        at javax.swing.JComponent.paint(JComponent.java:1012)
        at javax.swing.JComponent.paintChildren(JComponent.java:840)
        at javax.swing.JComponent.paint(JComponent.java:1012)
        at javax.swing.JLayeredPane.paint(JLayeredPane.java:559)
        at javax.swing.JComponent.paintChildren(JComponent.java:840)
        at javax.swing.JComponent.paint(JComponent.java:1012)
        at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4930)

        at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4883)
        at javax.swing.JComponent._paintImmediately(JComponent.java:4826)
        at javax.swing.JComponent.paintImmediately(JComponent.java:4633)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:451)

        at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(System
EventQueueUtilities.java:114)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:234)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package com.dim;

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

public class JProgressBarTest extends JFrame
{
  public JProgressBarTest()
  {
    GridBagLayout g = new GridBagLayout();
    GridBagConstraints c = new GridBagConstraints();

    setLayout(g);

    c.weighty = 1.0;

    JProgressBar bar = new JProgressBar();
    g.setConstraints(bar, c);
    add(bar);

    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

    pack();
    setVisible(true);
  }

  public static void main(String[] args)
  {
    Toolkit.getDefaultToolkit().setDynamicLayout(true);

    new JProgressBarTest();
  }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
removing "c.weighty = 1.0" helps.

*************************
in javax.swing.plaf.basic.BasicProgressBarUI.java :

    protected void paintDeterminate(Graphics g, JComponent c) {
        if (!(g instanceof Graphics2D)) {
            return;
        }
 
Insets b = progressBar.getInsets(); // area for border
int barRectWidth = progressBar.getWidth() - (b.right + b.left);
int barRectHeight = progressBar.getHeight() - (b.top + b.bottom);
 
        int cellLength = getCellLength();
        int cellSpacing = getCellSpacing();
// amount of progress to draw
int amountFull = getAmountFull(b, barRectWidth, barRectHeight);

        Graphics2D g2 = (Graphics2D)g;
g2.setColor(progressBar.getForeground());
 
if (progressBar.getOrientation() == JProgressBar.HORIZONTAL) {
// draw the cells
if (cellSpacing == 0 && amountFull > 0) {
                // draw one big Rect because there is no space between cells
                g2.setStroke(new BasicStroke((float)barRectHeight,
                        BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
...

as you can see

int barRectHeight = progressBar.getHeight() - (b.top + b.bottom);

could be negative and it generates an exception calling

g2.setStroke(new BasicStroke((float)barRectHeight,
      BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
*****************************
###@###.### 2005-03-03 17:45:43 GMT