How do I use interfaces in Java?

How do I use interfaces in Java?

In Java, an interface is a reference type, similar to a class, that can contain only constants, method signatures, default methods, static methods, and nested types. To use an interface, you define it using the interface keyword and then implement it in a class using the implements keyword.

Can you give me an example of 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, Animal is an interface with a method makeSound(), and Dog is a class that implements this interface.

What are the benefits of using interfaces?

Using interfaces allows for abstraction and multiple inheritance in Java. They enable you to define a contract that classes can implement, promoting loose coupling and enhancing code flexibility.

Can a class implement multiple interfaces?

Yes, a class in Java can implement multiple interfaces. This allows for a form of multiple inheritance, enabling a class to inherit behaviors from various sources.