interface vs abstract class in Java – What’s the Real Difference?

 In Object-Oriented Programming, both interfaces and abstract classes help you design flexible, reusable code.

But they’re not the same. Let’s break down the difference in a clean and simple way

What is an Interface?

• A pure blueprint - it can only contain:
• Method signatures (no body)
• final static constants
• Cannot have Constructors

Example:

interface Animal 

{

    void makeSound();

}

 What is an abstract class?

• A class that can have both abstract and non-abstract methods.

• Can have fields, constructors, and full method bodies.

• Cannot be directly instantiated.