Java Functional Interfaces Explained | Java 8 Tutorial
In this video, you’ll learn everything about Functional Interfaces in Java — a key concept behind Lambda Expressions and Functional Programming in Java 8.
We’ll explore how to create and use functional interfaces, the role of the @FunctionalInterface annotation, and how Java’s built-in interfaces like Predicate, Function, and Consumer make your code cleaner and easier to maintain.
🔹 Topics Covered:
What is a Functional Interface?
Rules of @FunctionalInterface annotation
SAM (Single Abstract Method) concept
Built-in Functional Interfaces (Predicate, Consumer, Supplier, Function)
Custom Functional Interface examples
Real-time coding examples using Lambda Expressions
💡 Perfect for Java beginners, interview prep, and professionals upgrading to Java 8+ functional style.
📘 Watch till the end for hands-on demos and interview-focused questions.
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