I am also a beginner like you using java lang.
Did you tried 'Slick 2D'. also there are great tutorials for making simple games in java which makes you interest in coding and making games.
Here is the slick site
http://slick.cokeandcode.com/
There are many tutorials on there site but one for tetris is.
http://slick.cokeand...2_-_slickblocks
also there are many youtube playlist for step by step videos..like minecraft2d(using slick) and all..