I am java developer having 2 years exp. in small company in Delhi/NCR and new for certification and interested for SCJP,OOPJP in future very soon...
But so confused about these and I don't have any idea from where I start for certification please suggest me.
Sierra and Bates book is also very nice if you are considering version 6. For version 7, as per my knowledge, there's no any book, however, we can expect a book within few months (since there's pretty big change in objectives).
If version 6 or 7 is your doubt, and if you are considering version 6 because there's no material available, then I would suggest to wait till material becomes available and go for the version 7 exam. It has got some nice objectives which are not there in version 6.