Core Java

[Core Java Tutorials](http://www.tutorialspoint.com/java/java_tutorial.pdf) -  Learn Basics of Java and Core java Concepts
[Java Design Patterns](https://github.com/iluwatar/java-design-patterns) - Different java design patterns with their examples 
[Core Java Tutorials From beginners](https://codegym.cc) - Learn java From Scratch
[Java leaning with project](https://hyperskill.org) - Java From project and Map