This bug is being reported in order to have a public record of a JDK 1.3
bug that causes a JCK 1.3a test to be excluded.

In JDK 1.3, if an ImageIcon is created using the ImageIcon(Image) constructor,
the ImageIcon.toString() method returns a null value.

This causes the JCK 1.3a test
api/javax_swing/interactive/JComboBoxTests.html#JComboBox
(testcase JComboBoxTest0004) to fail against JDK 1.3.
The following NullPointerException is thrown when the <SHIFT> key is pressed
over the JComboBox:
  Exception occurred during event dispatching:
    java.lang.NullPointerException
     at
javax.swing.JComboBox$DefaultKeySelectionManager.selectionForKey(JComboBox.java:1166)
     at javax.swing.JComboBox.selectWithKeyChar(JComboBox.java:991)
     at javax.swing.plaf.basic.BasicComboBoxUI$KeyHandler.keyPressed(BasicComboBoxUI.java:390)
     at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:190)
     at java.awt.Component.processKeyEvent(Component.java:3677)
     at javax.swing.JComponent.processKeyEvent(JComponent.java:2014)
     at java.awt.Component.processEvent(Component.java:3553)
     at java.awt.Container.processEvent(Container.java:1164)
     at java.awt.Component.dispatchEventImpl(Component.java:2593)
     at java.awt.Container.dispatchEventImpl(Container.java:1213)
     at java.awt.Component.dispatchEvent(Component.java:2497)
     at java.awt.LightweightDispatcher.processKeyEvent(Container.java:2155)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2135)
     at java.awt.Container.dispatchEventImpl(Container.java:1200)
     at java.awt.Window.dispatchEventImpl(Window.java:926)
     at java.awt.Component.dispatchEvent(Component.java:2497)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:339)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:131)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:98)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:85)

The attached test program demonstrates the bug.
If JDK 1.3 is used, a null value is returned by ImageIcon.toString().
If JDK 1.4 is used, a non-null value is returned by this method.