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Type: Bug
Resolution: Fixed
Priority: P3
Fix Version/s: 6
Affects Version/s: 5.0
Component/s: client-libs
Labels:

Subcomponent:
javax.swing
Resolved In Build:
b16
CPU:

x86
OS:

windows_xp

FULL PRODUCT VERSION :
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
Java HotSpot(TM) Client VM (build 1.5.0-b64, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
If a floatable JToolBar is created while the XP Style prevails but not shown until after switching to the Classic style an exception occurs.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run supplied code (XPStyleProblem) and follow the instructions it presents.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at com.sun.java.swing.plaf.windows.XPStyle$Skin.<init>(XPStyle.java:491)
        at com.sun.java.swing.plaf.windows.XPStyle$Skin.<init>(XPStyle.java:434)
        at com.sun.java.swing.plaf.windows.XPStyle.getSkin(XPStyle.java:424)
        at com.sun.java.swing.plaf.windows.WindowsBorders$ToolBarBorder.paintBorder(WindowsBorders.java:161)
        at javax.swing.JComponent.paintBorder(JComponent.java:901)
        at javax.swing.JToolBar.paintBorder(JToolBar.java:324)
        at javax.swing.JComponent.paint(JComponent.java:1004)
        at javax.swing.JComponent.paintChildren(JComponent.java:840)
        at javax.swing.JComponent.paint(JComponent.java:1012)
        at javax.swing.JComponent.paintChildren(JComponent.java:840)
        at javax.swing.JComponent.paint(JComponent.java:1012)
        at javax.swing.JLayeredPane.paint(JLayeredPane.java:559)
        at javax.swing.JComponent.paintChildren(JComponent.java:840)
        at javax.swing.JComponent.paint(JComponent.java:1012)
        at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4930)
        at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4883)
        at javax.swing.JComponent._paintImmediately(JComponent.java:4826)
        at javax.swing.JComponent.paintImmediately(JComponent.java:4633)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:451)
        at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.
java:114)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.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 ----------
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.BevelBorder;

public class XPStyleProblem {

    private static String instructions = "<HTML><BODY><OL>"
                                       + "<LI>Start with OS set to XP style</LI>"
                                       + "<LI>Switch OS to Classic style</LI>"
                                       + "<LI>Press the Show Toolbar button.</LI>"
                                       + "<LI>Observe exception.</LI>"
                                       + "</OL></BODY></HTML>";

    public static void main(String[] args) {

        try {UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());}
        catch (Exception e) {}

        final JFrame frame = new JFrame("Style Change Problem");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        final JToolBar toolBar = new JToolBar();
        toolBar.setVisible(false);
        JButton button = new JButton("1");
        toolBar.add(button);
        button = new JButton("2");
        toolBar.add(button);
        frame.getContentPane().add(toolBar, BorderLayout.NORTH);

        JLabel label = new JLabel(instructions);
        label.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
        frame.getContentPane().add(label, BorderLayout.CENTER);

        button = new JButton("Show Toolbar");
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                toolBar.setVisible(true);
                frame.pack();
        }});
        Box box = Box.createHorizontalBox();
        box.add(Box.createHorizontalGlue());
        box.add(button);
        box.add(Box.createHorizontalGlue());
        frame.getContentPane().add(box, BorderLayout.SOUTH);

        frame.pack();
        frame.setVisible(true);
    }
}

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

CUSTOMER SUBMITTED WORKAROUND :
Calling JToolBar.setFloatable(false) prevents the problem. If this isn't acceptable, other workarounds are probably possible.
###@###.### 2004-11-11 23:08:59 GMT

Assignee:: Leif Samuelsson (Inactive)

Reporter:: Ranjith Mandala (Inactive)

Votes:: 0 Vote for this issue

Watchers:: 1 Start watching this issue

Created:: 2004-11-11 15:08

Updated:: 2011-01-31 09:27

Resolved:: 2004-12-10 20:16

Imported:: 16/Sep/12 6:44 AM

Indexed:: 18/Jul/12 2:33 AM

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