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.

If you want to master functional programming, the best place to start is with the Java Function interface.This example will show you four different ways to implement this functional interface in your ...

Java Supplier interface tutorial. As you can see, the code for the class that implements Java’s Supplier interface is fairly simple. The only requirements are the class declaration and the ...

This is an in-depth java tutorial for beginners. ... This not only serves as an interface for your Java (or Kotlin) code, but also acts as a bridge for accessing Android-specific code from the SDK.

If you’ve read my Java 101 tutorial introducing static classes and inner classes, you should be familiar with the basics of working with nested classes in Java code.