Do interfaces evolve?

1. How user interface evolved over the years?
2. Can Interfaces be changed?
3. Do classes extend interfaces?
4. Does an interface have a relationship?

How user interface evolved over the years?

The evolution of UI design can be broken down into four periods: the age of tools, the age of the machine, the age of software, and the age of the self. With this rapid growth, an exploration into human interaction with objects, the environment, and technology has become essential.

Can Interfaces be changed?

No, we can't change the value of an interface field because interface fields are final and static by default. We will get compile time error, if we try to change the interface field value.

Do classes extend interfaces?

An interface can extend other interfaces, just as a class subclass or extend another class. However, whereas a class can extend only one other class, an interface can extend any number of interfaces.

Does an interface have a relationship?

It is used to achieve abstraction and multiple inheritance in Java. In other words, you can say that interfaces can have abstract methods and variables. It cannot have a method body. Java Interface also represents the IS-A relationship.