Hi William -
There have been many changes from
SCJP 6 to OCPJP 7 and OCPJP8.
1. Count of exams to earn certified Programmer's title-
To earn SCJP6, you write only one exam. For OCPJP7 and OCPJP8, the count is 2. Unless you are writing an upgrade exam, you need to write
OCAJP 7/ OCAJP8 with the OCPJP7/ OCPJP8.
2. Comparing exam topics
Oracle has included multiple advanced prohramming topics in OCPJP 7 and OCPJP 8, which were not included in SCJP 6. The newer exam version includes
string processing, concurrency, localization, lambda, streams API, new date time API among others.
Here's a link to the detaild exam objectives -
OCA Java SE 7
OCP Java SE 7
OCA Java SE 8
OCP Java SE 8
Thanks.
With much respect,
Mala