Dynamic lighting, ray casting soft shadow etc in slick2D.

I want to make lighting in my game and get results like with box2dlights. I don’t want to use libgx and box2dlights that is the last option. So are there any libs that i can use with slick2D to make lights like that? Do i use some kind of a shader? I really don’t have a clue…

http://www.gamedev.net/page/resources/_/technical/graphics-programming-and-theory/dynamic-2d-soft-shadows-r2032

This page pretty much covers the subject