All Algorithms implemented in Java
Everything you need to know to get the job.
Design patterns implemented in Java
Just Announced - "Learn Spring Security OAuth":
MIT Deep Learning Book in PDF format (complete and parts) by Ian Goodfellow, Yoshua Bengio and Aaron Courville
FizzBuzz Enterprise Edition is a no-nonsense implementation of FizzBuzz made by serious businessmen for serious business purposes.
LeetCode of algorithms with java solution(updating).
Modern Java - A Guide to Java 8
A list of useful Java frameworks, libraries, software and hello worlds examples