What are Java interfaces and how do I use them?

What are Java interfaces and how do I use them?

Java interfaces are abstract types that allow you to define methods that must be implemented by classes. They are used to achieve abstraction and multiple inheritance in Java.

Can you give me an example of how to create and implement 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 Animal interface defines a method makeSound(), which the Dog class implements.

What are the benefits of using interfaces in Java?

Using interfaces allows for greater flexibility and scalability in your code. They enable you to define a contract for classes, promote loose coupling, and support multiple inheritance.

Can an interface extend another interface?

Yes, an interface can extend another interface. This allows you to create a more complex interface that inherits the methods of the parent interface.