Project 2: Shape Area Calculator

Build a Shape Area Calculator

Apply your OOP skills! Create a class hierarchy using inheritance and polymorphism to calculate areas of different shapes.

YOUR TASK

Create a program with:

An abstract class Shape with an abstract method area()
A Circle class (radius = 5) that extends Shape
A Rectangle class (width = 4, height = 7) that extends Shape
Print each shape's area using polymorphism

Need a hint?

Circle area = π × r² ≈ 78.54 (use Math.PI and round to 2 decimals with String.format("%.2f", ...))

Rectangle area = width × height = 28

Use abstract class Shape { abstract double area(); }

Expected Output:

Circle area: 78.54
Rectangle area: 28.0

Language:

Input:

Code Editor Ready

Output

Console

Console initialized...
Ready for Project 2: Shape Area Calculator

> Use abstract classes and inheritance to solve this
> Check your output matches the expected format exactly!