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List question

John Olivas
Greenhorn

Joined: Jul 19, 2010
Posts: 2
My question is why do I throw an exception every time I try to add data to my List?

method below, thanks!

pete stein
Bartender

Joined: Feb 23, 2007
Posts: 1561
You need to show the exact expression information that is returned and indicate which line is throwing it to get better help. So for now I can only guess that you're getting a NullPointerException as you never initialize the result List<String>.

For instance, I would change this:


to this:


ps: I added code tags to your post to help make it readable. The forum FAQ's will show you how to do this yourself: UseCodeTags

ps2: Please let me be the first to welcome you to JavaRanch!
David Newton
Author
Rancher

Joined: Sep 29, 2008
Posts: 12617

(And make sure you close the connection, and don't over-comment.)
John Olivas
Greenhorn

Joined: Jul 19, 2010
Posts: 2
Thank you both. I will add the code tags and remove the excess comments before posting.

And yes you were correct, initializing the List did the trick.
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: List question
 
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