hi, okay I am make a mini 2d game engine just for self learning purposes anyway when i try and export it as a runnable jar it exports without any errors and when i click on it to run it, it doesn't run. there isnt anything wrong with my code because it works fine in eclipse when click the run or debug button. i used package required libraries into generated jar also and im pretty sure i have the right launch config. all my resources are in the build path, i have no idea why its not launching. can you think of any reason why it wont launch ? thanks