What to use to write a graphical application in java?

Question

Java

I want to start writing a game in java. I was thinking about javafx, but it seems to be quite outdated.
What is now, in 2018, used to write graphics and on what platforms is this graphics supported?

Answer 1

Game on LibGDX. Supports many platforms.

Answer 2

LibGDX or JMonkeyEngine
https://libgdx.badlogicgames.com/
jmonkeyengine.org