My code is about to be too long to be post here…
At this point, my project import processing.core and my class game, player, ball are working.
on a new branch ( on my computer ) i am using swing to create a setup screen and a splash screen.
As i ve already said, i am a beginer and the more i use “regular java”, the more i understand that it s weird to import processing.core…but still funny.
Here the repo of the project 
and here a video made for the “baccalaureat”