Tested with Merlin build 1.4.0-beta-b46 on japanese Solaris8 and 7 sparc, Solaris8 X86 and Windows2000.

java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b46)
Java HotSpot(TM) Client VM (build 1.4beta-B45, mixed mode)

NullPointerException is thrown in JOptionPane.showInputDialog(message) as below;

Exception :java.lang.NullPointerException
java.lang.NullPointerException
        at javax.swing.JOptionPane.showInputDialog(JOptionPane.java:526)
        at javax.swing.JOptionPane.showInputDialog(JOptionPane.java:476)
        at javax.swing.JOptionPane.showInputDialog(JOptionPane.java:431)
        at javax.swing.JOptionPane.showInputDialog(JOptionPane.java:399)
        at JOptionPaneTest.actionPerformed(JOptionPaneTest.java:83)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1605)
        at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1659)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:251)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:247)
        at java.awt.Component.processMouseEvent(Component.java:4857)
        at java.awt.Component.processEvent(Component.java:4683)
        at java.awt.Container.processEvent(Container.java:1299)
        at java.awt.Component.dispatchEventImpl(Component.java:3455)
        at java.awt.Container.dispatchEventImpl(Container.java:1361)
        at java.awt.Component.dispatchEvent(Component.java:3322)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3146)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2866)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2824)
        at java.awt.Container.dispatchEventImpl(Container.java:1335)
        at java.awt.Window.dispatchEventImpl(Window.java:1250)
        at java.awt.Component.dispatchEvent(Component.java:3322)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:437)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:140)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:126)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:121)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)


This is not reproducible with Merlin b44.

To reproduce,

1. Compile an attached program "JOptionPaneTest.java"
2. Run the case.
3. You can see two items in "dialog type" menu.
4. Select showInputDialog(message) from the menu.
5. Click "create" button.
Then, you can see the problem.

When you select the other item showInputDialog(parent, message),
you can see it works fine.