You're on your own to learn the material. I bought K & B (the SCJP 5 book by Kathy Sierra & Bert Bates) ISBN: 0-07-225360-6. It's a great book my only gripe is that the practice exams require Microsoft Windows and the additional practice exam from the Web wasn't that easy to even get.
Sun has some online study material -- but it is WAY too expensive.
Sun has some additional practice exams that are more affordable for $75.00.
The cost of the voucher, $200.00, includes about 3 hours at a testing center to take the certificate exam -- but no time at any learning center.
After passing, you get a packet with a card saying that you passed the exam, a lapel pin, and the right to use the the SCJP logo. Your name is also entered into a database at Sun so that you can prove that you passed the exam and have your SCJP certificate.