So basically what i’m trying to do is create a pokedex AR code generator. I already know how each is generated, but what i want to do is create a grid tht I would turn into an image. I don’t need to generate an image. I could technically just draw the grid & leave it, but I want to learn a bit more. I know there are already programs tht do this, but i just wanted to have a wack at it myself. practice is important right? 
I could also directly draw this to the image instead of making a grid first. I was reading & apparently i have to use bufferedimages? i kinda get it, but can anyone elaborate?
A BufferedImage allows you to draw on it by obtaining its Graphics object or directly manipulating its pixels.
Do u know of any good tutorials? 
I tried looking around but most of it isn’t exactly helpful. I have a vague idea of whats going on.
Tutorials for what? Using a BufferedImage? http://download.oracle.com/javase/tutorial/2d/images/index.html