Hi,
The problem is in your processEvent function which you didn't send, so this answer is a
guess.
When your function is passed an event e, that event may be null. So before you do
e.anyfunction() you have to do an if (e != null)
Why java (java3d?) sends these null events is a mystery to me, but checking for null
may solve your problem.
From,
Greg
SUBSCRIBE JAVA3D-INTEREST peter wrote:
> 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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