Is there another cool framework or library that I missed similar to libGDX?

I used to develop flash games in as3, I really liked all the documentation and libraries available, but due to money problems real world called and I had to get a job, currently I'm programming java enterprise applications (boring stuff).

I want to start making some java games (browser stuff most likely) in my free time and I'm torn apart between LWJGL or libGDX, which one do you recommend. LibGDX seems higher level and has android deployment and on the other hand LWJGL is a lot more mature and getting to know how to program games on that library seems more valuable in the long term.

What are your thoughts?