Interface in Java with realtime example

#java #javaprogramming #javatutorial
Hey everyone 👋 Welcome back to the channel!
In today’s video, we’re going to unlock one of the most powerful concepts in Java — Interfaces.
So, what exactly is an interface?
👉 Think of it as a blueprint — a contract that defines what a class must do, but not how it should do it.
But why should we use interfaces in the first place? 🤔
Because they help us write code that is:
Flexible — easy to swap implementations.
Consistent — different classes can follow the same structure.
Loosely coupled — making our programs easier to test and maintain.
Here’s what we’ll cover in this video:
✅ First, we’ll break down what an Interface is and why it’s so useful.
✅ Then, we’ll look at the Key Benefits and Use Cases.
✅ And finally, we’ll dive into real-world examples — including:
🐾 An Animal Interface to show polymorphism in action.
📝 A Logger Interface to separate console and file logging.
🎯 An Event Handling Interface — similar to how buttons work in real applications.
By the end of this video, you’ll not only understand how interfaces work, but also see how they’re used in real-world projects every single day.