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, sharing)


A DESCRIPTION OF THE PROBLEM :
See test prog

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Start test
press the mnemonic (alt-m)


ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at javax.swing.plaf.basic.BasicTabbedPaneUI$Actions.actionPerformed(BasicTabbedPaneUI.java:2000)
        at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1571)
        at javax.swing.JComponent.processKeyBinding(JComponent.java:2730)
        at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:255)
        at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:204)
        at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:2807)
        at javax.swing.JComponent.processKeyBindings(JComponent.java:2799)
        at javax.swing.JComponent.processKeyEvent(JComponent.java:2693)
        at java.awt.Component.processEvent(Component.java:5265)
        at java.awt.Container.processEvent(Container.java:1966)
        at java.awt.Component.dispatchEventImpl(Component.java:3955)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1810)
        at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:668)
        at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:916)
        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:794)
        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:632)
        at java.awt.Component.dispatchEventImpl(Component.java:3841)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Window.dispatchEventImpl(Window.java:1766)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        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 javax.swing.*;
import java.awt.*;
 
public class Bla {
    public static void main(String[] a) {
        JPanel top = new JPanel(new GridLayout());
        final JTabbedPane tabWidget = new JTabbedPane();
        JPanel tab = new JPanel();
        tabWidget.addTab("bla", new JPanel());
        tabWidget.addTab("Mnemonic", tab);
        tabWidget.setMnemonicAt(tabWidget.indexOfComponent(tab), 'M');
        top.add(tabWidget);
 
        final JFrame frame = new JFrame("myTitle");
        frame.setSize(new Dimension(400, 400));
        frame.add(top);
 
        Runnable r = new Runnable() {
            public void run() {
                javax.swing.SwingUtilities.updateComponentTreeUI(frame);
                frame.show();
            }
        };
        javax.swing.SwingUtilities.invokeLater(r);
 
    }
}
---------- END SOURCE ----------

Release Regression From : 1.4.2
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.
###@###.### 10/16/04 18:26 GMT