Mar 27, 2025 · 1. Introduction This tutorial is a guide to different functional interfaces present in Java 8, as well as their general use cases, and usage in the standard JDK library.

5 days ago · Java 8 introduced four main functional interface types under the package java.util.function. These are widely used in Stream API, collections and lambda-based …

The interfaces in this package are general purpose functional interfaces used by the JDK, and are available to be used by user code as well. While they do not identify a complete set of function …

Mar 17, 2019 · In this article, we will see Java 8 functional interfaces, @FunctionalInterface annotation, java.util.function package and how to use new Java 8 functional interfaces to …

Aug 11, 2025 · Discover Java 8+ functional interfaces with real-world examples. Learn how to use Function, Predicate, Consumer, and Supplier in modern Java apps

Functional interfaces were introduced in Java 8 along with lambda expression and method references. These three features were added to boost functional programming in Java and to …

Jun 12, 2025 · Functional interfaces are a powerful feature introduced in Java 8 that enable developers to write more concise and expressive code using lambda expressions and method …

A functional interface is an interface that contains exactly one abstract method but can have multiple default and static methods. Functional interfaces enable the use of Lambda …

Overview In this tutorial we will be looking at one of the most fundamental features of functional aspects of Java 8 - functional interfaces. We will start by looking at the definition of functional …

Apr 1, 2025 · Java 8 also introduces “Lambda Expressions” inside functional interfaces. Besides, from Java 8 onwards there are more built-in functional interfaces added in Java.