FULL PRODUCT VERSION :
Java(TM) SE Runtime Environment (build 1.7.0_02-b13)
Java HotSpot(TM) Client VM (build 22.0-b10, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
JProgressBar components throw an exception if resized to zero height, but only if setStringPainted(true) is set, and only if the look and feel is set to the default look and feel on Windows, or "com.sun.java.swing.plaf.windows.WindowsLookAndFeel".

The bug is present in the most recent JDK 1.7 as well as 1.6.0_25-b06.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile the included source and the application. Resize the window, decreasing the height, until the progress bar is forced out of view.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No exception should be thrown
ACTUAL -
An IllegalArgumentException is thrown.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: negative width
        at java.awt.BasicStroke.<init>(BasicStroke.java:192)
        at java.awt.BasicStroke.<init>(BasicStroke.java:265)
        at com.sun.java.swing.plaf.windows.WindowsProgressBarUI.paintDeterminate(WindowsProgressBarUI.java:141)
        at javax.swing.plaf.basic.BasicProgressBarUI.paint(BasicProgressBarUI.java:412)
        at javax.swing.plaf.ComponentUI.update(ComponentUI.java:161)
        at javax.swing.JComponent.paintComponent(JComponent.java:778)
        at javax.swing.JComponent.paint(JComponent.java:1054)
        at javax.swing.JComponent.paintChildren(JComponent.java:887)
        at javax.swing.JComponent.paint(JComponent.java:1063)
        at javax.swing.JComponent.paintChildren(JComponent.java:887)
        at javax.swing.JComponent.paint(JComponent.java:1063)
        at javax.swing.JLayeredPane.paint(JLayeredPane.java:585)
        at javax.swing.JComponent.paintChildren(JComponent.java:887)
        at javax.swing.JComponent.paintToOffscreen(JComponent.java:5228)
        at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1482)
        at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1413)
        at javax.swing.RepaintManager.paint(RepaintManager.java:1206)
        at javax.swing.JComponent.paint(JComponent.java:1040)
        at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39)
        at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:78)
        at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:115)
        at java.awt.Container.paint(Container.java:1967)
        at java.awt.Window.paint(Window.java:3867)
       ...


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.*;
import java.awt.*;

public class JProgressBarTest extends JFrame {
  public JProgressBarTest() {
    add(new JLabel("Above"), "North");
    JProgressBar bar = new JProgressBar();
    add(bar, "Center");
    add(new JLabel("Below"), "South");

    bar.setStringPainted(true);

    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    pack();
    setVisible(true);
  }

  public static void main(String[] args) throws Exception {
    // if running on windows
    // UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    
    // to force the LAF, assuming the class is available
    UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");

    new JProgressBarTest();
  }
}

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

CUSTOMER SUBMITTED WORKAROUND :
Use a look-and-feel other than Windows.