Question

In this programming assignment, you have to create a set of classes that implement abstract classes and interfaces in Java. You will use the concepts of abstraction, polymorphism, and inheritance to create classes that have different behavior depending on their type.

Instructions:
Create the following classes:
"Shape" abstract class
This class should have an abstract method called "calculateArea()".
It should also have a concrete method called "printArea()" that prints the area calculated by the "calculateArea()" method.

Answer 1

The student's assignment in Java requires creating an abstract class 'Shape' with an abstract method 'calculateArea()' and a concrete method 'printArea()' to exemplify abstraction, polymorphism and inheritance.

Step-by-step explanation:

The question is related to a programming assignment in Java and involves creating classes that demonstrate the concepts of abstraction, polymorphism, and inheritance. Specifically, the question asks for the implementation of an abstract class named 'Shape' with an abstract method calculateArea(). Moreover, this class should contain a concrete method called printArea() which relies on the calculateArea() method to print out the area of the shape.

A shape in general can be understood as a two-dimensional enclosed area. When designing classes in a programming context, this translates to creating a structure that allows for different types of shapes to be defined, each with its own way of calculating the area. The behavior of these methods will vary depending on the specific type of shape instantiated - for instance, a Circle class or a Rectangle class each has a distinct formula for computing its area.