My guess would be that your programm is just loading the png from where it is, but the png-file itself is not included in your project/jar.
In Eclipse you can just drag and drop the file into your projectfolder and eclipse will ask you, if you want to copy and safe it inside your project.
Knowledge Reigns Supreme
What are you doing? You are supposed to be reading this tiny ad!
the new thread boost feature brings a LOT of attention to your favorite threads