Java 8 functional programming - Predicate Functional Interface | Real World Examples | Part 2

Published: 23 June 2026
on channel: Advanced Tech Tutor (ATT)

Welcome to Part 2 of the Functional Interface & Lambda Expressions Series!

In this video, we dive deep into the Predicate Functional Interface, one of the most important functional interfaces introduced in Java 8.

A Predicate is used to test conditions and return a boolean result. It is heavily used in filtering, validation, authorization, eligibility checks, business rule engines, Stream API operations, and real-world enterprise applications.

📚 Topics Covered:

✔ What is Predicate?
✔ Functional Interface Overview
✔ test Method Explained
✔ Predicate with Lambda Expressions
✔ Filtering Data using Predicate
✔ Predicate Chaining
✔ and Method
✔ or Method
✔ negate() Method
✔ Real-World Validation Examples
✔ Business Rule Engine Examples
✔ Predicate with Stream API
✔ Interview Questions & Answers

💻 Examples Covered:

✅ Check Even/Odd Numbers
✅ Check Positive Numbers
✅ Employee Salary Validation
✅ User Eligibility Validation
✅ Loan Approval Rule Engine
✅ Fraud Detection Rules
✅ Product Filtering
✅ Stream API Filtering
✅ Predicate Chaining Examples

🔥 Real-World Use Cases:

• Input Validation
• Authorization Rules
• Eligibility Checks
• Fraud Detection Systems
• Workflow Engines
• Rule Engines
• Search Filters
• Spring Boot Applications

🎯 Perfect For:

✔ Java Beginners
✔ Java Developers
✔ Spring Boot Developers
✔ Interview Preparation
✔ Backend Engineers
✔ Software Engineers

📌 Functional Interface Series:

Part 1 - Introduction to Functional Interfaces & Lambda Expressions
Part 2 - Predicate Functional Interface
Part 3 - Consumer Functional Interface
Part 4 - Function & Supplier Functional Interfaces
Part 5 - Method References

If you found this video useful, don't forget to:

👍 Like
🔄 Share
🔔 Subscribe

for more Java, Spring Boot, AWS, Design Patterns, System Design, Microservices, Kafka and Interview Preparation content.

#Java #Predicate #FunctionalInterface #LambdaExpression #Java8 #FunctionalProgramming

On this page of the site you can watch the video online Java 8 functional programming - Predicate Functional Interface | Real World Examples | Part 2 with a duration of hours minute second in good quality, which was uploaded by the user Advanced Tech Tutor (ATT) 23 June 2026, share the link with friends and acquaintances, this video has already been watched 5 times on youtube and it was liked by 1 viewers. Enjoy your viewing!

2,790