Java Backend Road Map for absolute beginners

Core Java

Complete Core Java In Simple Way by Nagoor Babu from DurgaSoft

Database

Postgres SQL This video is focussed on postgres, you can chosse any db of your choice. The concept will be same just the syntax and a few other differences.

Advanced Java

Advanced Java (JDBC,Servlets & JSP) Videos and Materials

** You can skip JSP videos here

Spring

Spring Framework

Its very crucial for you to explore and find the best content for you.

Coming soon .. More links and resources.