Sorry for my English, but I hope I can help U.
I finished to develop e Java3D project a few day ago.
In many cases, I observed that some exception dued to AWT event (like
pressing AWT or Swing Button), are instead dued to not properly capabilities
setting.
In your case, I think that the children has no capabilitiy to detach from
parent.
----- Original Message -----
From: SUBSCRIBE JAVA3D-INTEREST peter <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, February 16, 2000 5:13 AM
Subject: [JAVA3D] how to solute that problem
> dear all
> i had created a button that is used to remove a BG child when the button
is pressed.
>
> final Button button1 = new Button("Stop");
> button1.addActionListener( new ActionListener() {
> public void actionPerformed(ActionEvent e)
> {
> processAction();
> });
>
> private void processAction()
> {
> scene.removeChild();
> }
> And when compile , it is no error. but when run, when i press the
> button
> it show the error like below
>
>
> "Exception occured during event dispatching:
> java.lang.NullPointerException:
> at Test.processAction (Test.java:876)
> at Test.processEvent(button.java,compiled code);
> at java.awt.Button.processActionEvent(Button.java:308)
> at java.awt.Button.processEvent(Button.java:281)
> at java .awt.EventQuene.dispatcheveny(eventquene.java,compile code);
> ....
> "
> can anyone help me? ugrency
>
>
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