Oracle Certified Professional, Java SE 5,6,7,8 Programmer
https://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=654&get_params=p_id:357&p_org_id=1080544&lang=US#tabs-1-1

Java Certificates list
https://en.wikipedia.org/wiki/Oracle_Certification_Program#Java_Certification_list

Java Cetification Path - Diagram (certified master looks old)
https://en.wikipedia.org/wiki/File:Java_Certification_Path.gif

7 Steps to Preparing for Java 8 Certification
https://dzone.com/articles/how-to-prepare-java-certification-in-7-steps

Best self study tutorial
https://docs.oracle.com/javase/tutorial/

Types:
	Oracle Certified  Associate    (OCA) /  Associate    Level Certification, in English
	Oracle Certified  Professional (OCP) /  Professional Level Certification, in English

Paths
	==========================================
	Associate		-> Professional
	==========================================
	j5&j6__ocA__1Z0-850	->	j5&j6__ocP__1Z0-851	- old (java 5&6, use only for learning, like sample ques)
	j7__ocA__1Z0-803	->	j7__ocP__1Z0-804	- old (java 7, use only for learning, like sample ques)
	j8__ocA__1Z0-808	->	j8__ocP__1Z0-809	- new (java 8)
	==========================================