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.

Nov 6, 2025 · 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

@FunctionalInterface annotation is useful for compilation time checking of your code. You cannot have more than one method besides static, default and abstract methods that override …

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 …

6 days ago · Functional interfaces provide a way to treat behavior as data, allowing developers to write more concise and expressive code. In this blog post, we will explore the fundamental …

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 …

Feb 10, 2025 · Java developers gained new tools like Functional Interfaces, Streams, and Optionals, allowing for more concise, readable, and expressive code. This article will take you …