FULL PRODUCT VERSION :
java version "1.5.0_04"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_04-b05
Java HotSpot(TM) Client VM (build 1.5.0_04-b05, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Windows XP
Windows 2000

EXTRA RELEVANT SYSTEM CONFIGURATION :
It happens with different machines, no specific hardware.

A DESCRIPTION OF THE PROBLEM :
I had a JPanel containing various elements (JButtons, JComboBoxes, JLabel, JTextArea and finally JProgressBar) for some statistics.

I had to print this frame on paper, so I created a PrintJob, I printed (print() method) on it the JPanel and then I ended the PrintJob to make the printer draw it on paper.

Everything was printed fine except for the JProgressBar, that was missing (obviously it contained a non-zero value, but anyway I set the setStringPainted() to true, and I also tried to use the setOpaque(true) on the JProgressBar).

NOTE: the JProgressBar was correctly displayed.

I tried also creating a separate application that only shows a JProgressBar filled to a random value, and then print it, but nothing was shown on the paper (see code attached).

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create a JPanel and put a JProgressBar in it.
Create a PrintJob and print on it the JPanel.
End the PrintJob to make the printer draw the JPanel.
The JProgressBar is missing.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I expected to see the JProgressBar printed.
ACTUAL -
The JProgressBar wasn't printed at all.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
No error mesage.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.PrintJob;
import java.awt.Toolkit;
import java.util.Properties;

public class PrintingTest extends JFrame
{
static JFrame TestFrame;
static JPanel MPanel;
static JProgressBar PBar;

public PrintingTest()
{
super();
MPanel = new JPanel(new BorderLayout());
PBar = new JProgressBar();
PBar.setOpaque(true);
PBar.setStringPainted(true);
PBar.setValue(50);
MPanel.add("Center",PBar);
this.setContentPane(MPanel);
this.setSize(200,50);
this.setVisible(true);
PrintJob Pj = Toolkit.getDefaultToolkit().getPrintJob(this,"Stampa statistiche",new Properties());
this.getContentPane().printAll(Pj.getGraphics());
Pj.end();
}

public static void main(String Args[])
{
TestFrame = new PrintingTest();
}
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Creating a new ProgressBar on my own.