In this Java 101 tutorial, I’ve explained how interfaces differ from classes, and showed you how to declare, implement, and extend interfaces in your Java programs.

Therefore, learning about variables in Java should be among the very first things you do when picking up the language. In this post, you’ll find everything you need to know.

I’ll also show you how to use var to declare local variables. See the Java Language Specification: Java SE 12 Edition for more about Java 12. Learn Java from the ground up ...