The Predicate interface in Java SE enhances functional programming ... They come in handy for things like filtering, validating, or making decisions based on certain criteria.

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, bring into a program ...

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 ...

In this Java tip, you’ll learn three common ways to use nesting techniques with Java interfaces. I’ll also briefly demonstrate nesting interfaces with static methods, also known as static ...

Marker Interfaces or Null interface in Java are special type of interfaces in character as they have no methods declared in them which means that if any classes implementing these interfaces don't ...

This example will show you four different ways to implement this functional interface in your code — starting with how to use an actual class, and how to create very concise code with a lambda ...

This is where Java’s functional Consumer interface comes in handy. According to the JavaDoc, the Consumer interface accepts any type of object as input. The java.util.function.Consumer class has one ...