Hi Latha,
I am preparing for
SCJP 5.0 . There is very less material available for this new version of SCJP. I started with Head First
Java 2nd Edition (which covers Java 5.0 ). After that I am planning to read Complete Java 2 certification (by Phillip Heller) and then K&B's certification book (which is for SCJP 1.4). Then I might buy ePractice exams from SUN ($75)for SCJP 5.0 as no good mock exams are available for SCJP 5.0 I hope this information will help.
Regards,