Jframe background image

Jframe background image

I am creating a GUI, albeit a simple one, and I want to have a background
image (2048 X 2048) fill up the whole window and a square to the left top
corner where the occasional 64 X 64 image can be loaded. Thanks in advance
to anyone who helps out :) Edit: I already know how to make the JFrame a
set size, its the image loading I need help with.