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.

Lambdas and the Function interface The goal of the Function interface is to take a value from the program, perform some type of calculation or operation on that value and then return a new value. Here ...

Create packages, import packaged classes and interfaces into your programs, move packages, and encapsulate them in jar files.

This is an in-depth java tutorial for beginners. Learn what Java is, how to get started, and how to build basic apps using key concepts!