Hi Roel De Nijs,
Thanks for the answer and the welcome
Yeah I kind of forget a lot of information in this post ^^. Actually I though the topic was the book name as it was referenced in the book but actually it's for all the study guides and not for a precise one.
So the study guide is the next: OCP: Oracle Certified Professional
Java SE 8 Programmer II Study Guide: Exam 1Z0-809
Wish you a nice day,
Frédéric