Name: nkR10003 Date: 07/17/2000


JComboBox.setUI method sometimes prints NullPointerException exception output
to the console while setting BasicComboBoxUI user interface. See example below:

%java -fullversion
java full version "1.4.0beta-b23"
------------------example--------------------
//ComboBoxExample.java
//
import javax.swing.*;
import javax.swing.plaf.basic.*;
public class ComboBoxExample {
    
    public static void main(String[] args) {
        BasicComboBoxUI ui = new BasicComboBoxUI();
        JComboBox comboBox = new JComboBox();
        comboBox.setUI(ui);
        System.out.println("Finish");
        System.exit(0);
    }
}
----------------output:----------------------
Exception occurred during event dispatching:
java.lang.NullPointerException
        at javax.swing.SwingUtilities.replaceUIInputMap(SwingUtilities.java:1405)
        at javax.swing.plaf.basic.BasicComboBoxUI.installKeyboardActions(BasicComboBoxUI.java:1270)
        at javax.swing.plaf.basic.BasicComboBoxUI$1.run(BasicComboBoxUI.java:159)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:353)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:127)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:117)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:96)
Finish
---------------------------------------------
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