Java Abstract Class Example - Shapes

This Java project demonstrates the concept of abstract classes and method overriding using geometric shapes like Circle and Rectangle. The program uses abstraction to define a common interface (Shape) and allows subclasses to provide specific implementations for calculating the area and perimeter.

📁 Package Structure

AbstractEx.java

📌 Features

• Abstract class Shape with two abstract methods:

  • double perimeter()
  • double area()

• Concrete classes:

  • Circle: Implements perimeter and area using radius.
  • Rectangle: Implements perimeter and area using length and breadth.

• Demonstrates:

  • Abstraction
  • Inheritance
  • Method Overriding
  • Polymorphism (by assigning Circle to a Shape reference)

🧪 Output

The Perimeter of Circle: 65.97344572538566 The Area of Circle: 346.3605900582747 Accessing Circle Area using Shape reference: 346.3605900582747 The Perimeter of Rectangle: 60.0 The Area of Rectangle: 200.0