pictures in jframe not loading after compiled

Question

so this is how my code looks in NetBeans:

and this is how it looks after I complied it

I think it has to do with this

ImageIcon background = new ImageIcon(getClass().getResource("/Graphics/BackgroundConcept.jpg"));

img = background.getImage(); 

I put all the picture in the src folder and it wont load BUT it load other picture for the title screen.

But I'm using this type of input

Image image=new ImageIcon(getClass().getResource("/Graphics/titleScreen.jpg")).getImage();  
               g.drawImage(image,0,0,this);

and

Image GameCredits=new ImageIcon(getClass().getResource("/Graphics/credits.gif")).getImage();

The problem is I'm not adding it to a JFrame.
It is long code so I'll post it in pastebucket, basically its moving the background images as I move.

It works in NetBeans but I needed a compiled version.

http://www.pastebucket.com/14192