Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.

However, Java refers to class libraries as packages. This article explores packages; I show you how to create packages of classes and interfaces, how to import (that is, ...

In Java, an interface is a blueprint for classes that outlines the methods that a class must implement. To implement an interface, you need to create a class that implements the interface and provides ...

A marker interface is an interface that has no methods or fields. It only serves as a way to mark or tag a class as belonging to a certain category or having a certain property. For example, the ...

Learn what a predicate interface is and how to use it in Java. Find out how to create your own custom predicate interface and combine it with other predicates. Sign in to view more content ...

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 ...