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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 2:14am
Edited 24-Apr-11 22:52pm
v3

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Solution 1

java.lang.NullPointerException
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.
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