Dheeraj Tak

Good Afternoon Everybody,
I am planning to give some java certification but am confused with all these version which i found on this site.
Can some body please help me how to start and which certification should i give.
I have very good experience in java / j2ee but i have not worked on some concepts like AWT / Applets etc.. thread though i know thread concepts and all..
and we generally use exclipe or some sort of IDE so might not remember the api and all

Please give me direction how should i go about ...what is the first step ..
i dont know anything about java certification in the sense what question are asked ..which topic carries how much mark ..i would be thankfull to you if you give me directions

Thanks ,Dheeraj