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I used JComboBox.. to remove all the items in the JComboBox. I used 'removeAllItems()' in 'ItemStateChanged' event but in runtime while changing items "java.lang.NullPointerException" error occurs.. but the component has items it's not null, but the error comes.. I can't find why..?

Please help me by giving a correct implementation for it.
Posted 21-Apr-11 1:14am
Edited 24-Apr-11 21:52pm

1 solution

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Solution 1

This simply means that you are trying to access a property of an object that is NULL.

For full details, look here.[^]

A simple use of DEBUGGER can tell you which object is null on the line that is throwing the error. Find it and handle it.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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0 Sergey Alexandrovich Kryukov 2,179
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