Name: asR10013 Date: 05/16/2001



JDK : 1.4.0-b64
Platform[s] : RedHat Linux 6.2, Windows 98

Pressing PageUp or PageDown on the JComboBox causes java.lang.StackOverflowError.
The StackOverflowError is thrown only if combobox is completely placed inside the parent frame when opened.
If combobox overlaps the parent's frame borders it behaves correctly.

How to reproduce:
====================
1. Compile and run the following program using jdk1.4.0-build 65
2. Left-click mouse on the top combo-box to pull it down.
3. Press PageUp and wait a few seconds

You will see java.lang.StackOverflowError.

The bottom combobox is placed on the frame as a sample of correct behavior.

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

public class test extends JFrame {
public static void main( String[] args ) {
    test tst = new test();
    tst.init();
    tst.setSize(300,300);
    tst.setVisible(true);
}
public void init() {
    setDefaultCloseOperation( EXIT_ON_CLOSE );
    
    JComboBox jcmb = new JComboBox();
    jcmb.addItem("JComobo1");
    jcmb.addItem("Item2");
    jcmb.addItem("Item3");
    getContentPane().add( jcmb, BorderLayout.NORTH );
    
    jcmb = new JComboBox();
    jcmb.addItem("JComobo2");
    jcmb.addItem("Item2");
    jcmb.addItem("Item3");
    getContentPane().add( jcmb, BorderLayout.SOUTH );
};
}
-------- end test.java ------------------

Test output:
=============
bash$ java -showversion test
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b64)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b64, mixed mode)
Warning: Cannot convert string "-b&h-lucida-medium-r-normal-sans-*-140-*-*-p-*-iso8859-1" to type FontStruct
java.lang.StackOverflowError
at java.awt.Toolkit.getEventQueue(Toolkit.java:1481)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:675)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:627)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:544)
at java.awt.Component.dispatchEventImpl(Component.java:3367)
at java.awt.Container.dispatchEventImpl(Container.java:1399)
at java.awt.Component.dispatchEvent(Component.java:3343)
at javax.swing.plaf.basic.BasicComboBoxUI$KeyToListDispatcher.actionPerformed(BasicComboBoxUI.java:1408)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1496)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2361)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2407)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2314)
at javax.swing.JComboBox.processKeyEvent(JComboBox.java:1340)
at java.awt.Component.processEvent(Component.java:4744)
at java.awt.Container.processEvent(Container.java:1337)
at java.awt.Component.dispatchEventImpl(Component.java:3476)
at java.awt.Container.dispatchEventImpl(Container.java:1399)
at java.awt.Component.dispatchEvent(Component.java:3343)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1514)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:572)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:689)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:627)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:544)
at java.awt.Component.dispatchEventImpl(Component.java:3367)
at java.awt.Container.dispatchEventImpl(Container.java:1399)
at java.awt.Component.dispatchEvent(Component.java:3343)
at javax.swing.plaf.basic.BasicComboBoxUI$KeyToListDispatcher.actionPerformed(BasicComboBoxUI.java:1408)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1496)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2361)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2407)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2314)
at javax.swing.JComboBox.processKeyEvent(JComboBox.java:1340)
at java.awt.Component.processEvent(Component.java:4744)
at java.awt.Container.processEvent(Container.java:1337)
at java.awt.Component.dispatchEventImpl(Component.java:3476)
at java.awt.Container.dispatchEventImpl(Container.java:1399)
at java.awt.Component.dispatchEvent(Component.java:3343)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1514)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:572)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:689)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:627)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:544)
at java.awt.Component.dispatchEventImpl(Component.java:3367)
at java.awt.Container.dispatchEventImpl(Container.java:1399)
at java.awt.Component.dispatchEvent(Component.java:3343)
at javax.swing.plaf.basic.BasicComboBoxUI$KeyToListDispatcher.actionPerformed(BasicComboBoxUI.java:1408)
...
The rest of trace log is about 70 K bytes and is skipped.
All the skipped log contains the same data as shown above.
...
        at java.awt.Component.processEvent(Component.java:4744)
        at java.awt.Container.processEvent(Container.java:1337)
        at java.awt.Component.dispatchEventImpl(Component.java:3476)
        at java.awt.Container.dispatchEventImpl(Container.java:1399)

Specific Machine Info:
=====================
Hostname: linux-24
OS: RedHat Linux 6.2

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