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.

Furthermore, the Java lambda syntax separates these two elements with an arrow. So to learn Java lambda syntax, you need to be familiar with its three component parts: The argument list; The arrow; ...

Creating an Interface in Java : Dive into the fundamentals of creating interfaces. Learn the syntax, rules, and best practices through a step-by-step example, laying a strong foundation for further ...

The UnaryOperator function. Like the Function interface, the UnaryOperator is passed a value and returns a value. However, the distinction between the UnaryOperator and the Function is that the ...

This is an in-depth java tutorial for beginners. ... This is the “Integrated Development Environment” or IDE: the interface used by developers to enter their code and call upon the JDK.

For an introduction to Java interfaces, including the difference between classes and interfaces, see my Java 101 tutorial Working with interfaces in Java. Nesting interfaces in classes.