Shape Class:

Create a class named Shape with the following methods:

calculateArea$()$: Returns $0\mathrm{.}0($to be overridden by subclasses$).$

display$()$: Prints "Area: $"$ followed by the calculated area.

Circle Class $($extends Shape$)$:

Create a subclass named Circle that extends Shape.

Add a private attribute radius and a constructor that initializes it$.$

Override the calculateArea method to calculate the area of a circle using the formula $\backslash$pi $*$ radius $*$ radius.

Rectangle Class $($extends Shape$)$:

Create another subclass named Rectangle that extends Shape.

Add private attributes length and width, and a constructor that initializes them.

Override the calculateArea method to calculate the area of a rectangle using the formula length $*$ width.

Main Class:

In the Main class, create instances of Circle and Rectangle using sample dimensions.

Call the display method on each instance to print the calculated areas.

Testing:

Compile and run your program to ensure that it produces the correct output, displaying the areas of the circle and rectangle.