Java 8 - Functional Programming - Functional Interface & Lambda Expression | Real Examples | Part 1

Published: 23 June 2026
on channel: Advanced Tech Tutor (ATT)
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Want to learn Java Functional Programming from scratch?

In this video, we begin our complete Functional Interface and Lambda Expressions series. You'll learn what Functional Interfaces are, why they were introduced in Java 8, how Lambda Expressions work, and how they simplify your code compared to traditional anonymous classes.

📚 Topics Covered:

✔ What is a Functional Interface?
✔ @FunctionalInterface Annotation
✔ Single Abstract Method (SAM)
✔ Why Functional Interfaces were introduced
✔ What are Lambda Expressions?
✔ Traditional Anonymous Class vs Lambda Expression
✔ Lambda Syntax Explained
✔ Method Parameters and Return Types
✔ Real-world Examples
✔ Benefits of Functional Programming in Java
✔ Foundation for Predicate, Consumer, Supplier, Function and Method References

💻 Examples Covered:

✅ Runnable using Anonymous Class
✅ Runnable using Lambda
✅ Custom Functional Interface
✅ Lambda with Parameters
✅ Lambda with Return Values
✅ Practical Java Coding Examples

🎯 This video is perfect for:

• Java Beginners
• Spring Boot Developers
• Interview Preparation
• Java 8+ Developers
• Software Engineers
• Functional Programming Learners

📌 Upcoming Videos in this Series:

Part 2 - Predicate Functional Interface
Part 3 - Consumer Functional Interface
Part 4 - Function & Supplier Functional Interface
Part 5 - Method References

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#Java #LambdaExpression #FunctionalInterface #Java8 #SpringBoot #JavaProgramming


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