#01 | Functional Interface and Lambda Expression in Java 8 | Explained

Java Functional Interface and Lambda Expression Explained

In this video, we learn Functional Interface and Lambda Expression in Java with a simple and practical example.

🔹 What is a Functional Interface?
A Functional Interface is an interface that contains only one abstract method.
It is mainly used with Lambda Expressions to write cleaner and shorter code.

🔹 Example Used in This Program
We create a functional interface Addable with a single method to add two numbers.

🔹 Without Lambda Expression
We implement the interface using an anonymous inner class
This approach requires more boilerplate code
It is the traditional way of implementing an interface

🔹 With Lambda Expression
We implement the same interface using a lambda expression
Lambda expression provides a shorter and more readable syntax
The logic is written directly using (parameters) arrow and expression

🔹 Key Concepts Covered
Functional Interface in Java
Anonymous inner class
Lambda expression syntax
Difference between lambda and non-lambda approach

This video is very useful for Java beginners, Java 8 learners, and interview preparation.

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Видео #01 | Functional Interface and Lambda Expression in Java 8 | Explained канала PhilodeX