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Urgent help needed debugging

David O Byrne

Joined: Mar 10, 2008
Posts: 1
The following is what is diplayed after I compile my project and then try to run it. It will compile without any errors but when I press run this comes up.

Exception in thread "main" java.lang.NullPointerException
at java.awt.Container.addImpl(
at java.awt.Container.add(
at MainPage.<init>(
at startApp.<init>(
at startApp.main(

Any help with how to fix it would be appreciated.
Jeanne Boyarsky
author & internet detective

Joined: May 26, 2003
Posts: 31668

Welcome to JavaRanch!

Please post the code around the part that throws the error. This will help someone assist you in debugging.

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subject: Urgent help needed debugging