Re: [JAVA3D] how to solve that problem

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dear :
 Thx for u help! I had followed your method and suceesful comilpe.But When i pressed 
the button, it show out the error as

"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);

i don't know what is the meaning of this problem, and how to solve this?
thx all. Ugrency

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