How to Use removeAllItems() without error

Question

0.00/5 (No votes)

See more:

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

inbaraj1988

Updated 24-Apr-11 21:52pm

v3

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

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

Sandeep Mewara · Answer 1 · 2011-04-21T02:52:00

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.

Posted 21-Apr-11 2:52am

Sandeep Mewara