What are interfaces in Java OOP?

What are interfaces in Java OOP?

Interfaces in Java are abstract types that allow you to define methods that must be implemented by classes.

Can you give me an example of how to use an interface?

Sure! Here's a simple example:

interface Animal {
    void makeSound();
}

class Dog implements Animal {
    public void makeSound() {
        System.out.println("Woof!");
    }
}

In this example, the Dog class implements the Animal interface.

What is the difference between an interface and an abstract class?

An interface can only contain method signatures and constants, while an abstract class can have method implementations and state.

Can a class implement multiple interfaces?

Yes, a class in Java can implement multiple interfaces, allowing for a form of multiple inheritance.