Can you explain interfaces in Java?

Can you explain interfaces in Java?

Sure! 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. Interfaces cannot contain instance fields or constructors.

What is the purpose of using interfaces?

Interfaces allow you to define a contract for what a class can do, without dictating how it should do it. This promotes loose coupling and enhances flexibility in your code.

Can a class implement multiple interfaces?

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

What happens if a class implements two interfaces with the same method?

If a class implements two interfaces that have the same method signature, the class must provide an implementation for that method. This avoids ambiguity.

Can you give me an example of an interface?

Certainly! Here's a simple example:

interface Animal {
    void eat();
    void sleep();
}