I know Java well, and I’ve created basic programs and run them in eclipse, but I don’t know how I would make games with graphics. I’ve searched around, but I can’t find any clear answers on what to use.
Look at this. Also look inside the first post, if you’ve done some research, you would have found the same stuff as in the link.
I like thechernoproject on youtube, he is doing a very long tutorial of a “realm of the mad god” type game, and I believe he will go into networked multiplayer in the future.
Libgdx, slick2d(dated, but good learning resource), or if you are hardcore, straight up lwjgl. Just look up game libraries. Good luck!
If you want to use LibGDX, this Tutorial/Wiki covers the basics that you need to know in order to draw graphics on a screen:
If you’re doing 2D graphics, what you’ll want to know in particular is how to use Sprite, SpriteBatch, Texture and TextureRegion.