/*Write a Java program to create a class called Shape with a method called getArea(). Create a subclass called Rectangle that overrides the getArea() method to calculate the area of a rectangle. */

// Shape class
class Shape {
    public double getArea() {
        return 0; // Default implementation for unknown shapes
    }
}

// Rectangle subclass extending Shape
class Rectangle extends Shape {
    private double length;
    private double width;

    public Rectangle(double length, double width) {
        this.length = length;
        this.width = width;
    }

    @Override
    public double getArea() {
        return length * width; // Calculate area of rectangle
    }
}

class Inheritance3 {
    public static void main(String[] args) {
        Shape shape = new Shape(); // Creating an instance of Shape (will use default getArea())

        Rectangle rectangle = new Rectangle(20, 40); // Creating an instance of Rectangle
        double rectangleArea = rectangle.getArea(); // Calculating area of rectangle

        System.out.println("Area of a shape (default): " + shape.getArea());
        System.out.println("Area of a rectangle: " + rectangleArea);
    }
}