title: How can I know where a Null Pointer Exception originated?
body: <p>I had a problem making a Blackberry app. I found some guy who made a tutorial which did what I attempted with mine. I copied the code of the tutorial's app to try and recreate it, just to see it in action. The result: Null Pointer Exception.</p>
  
  <p>I want to know what is triggering this. How can I?</p>