java exceptions. What do they mean??

I have a GUI with a JFileChooser on it. When i select the JFileChooser for the second time in the same real time i get the exceptions which are attached. I can't get rid of these. I've tried catching the NullPointerException for each method and i still get it. HELP!! Jon

## Deliverables

1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased.

## Platform

Java

Ingénierie Java MySQL PHP Architecture Logicielle Tests de Logiciels

Nº du projet : #2932842

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