Main.java

interface Shape {
    double getArea();
}

class Rectangle implements Shape{
    private double width; 
    private double height; 

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

    @Override
    public double getArea(){
        return width * height;
    }
}

class Circle implements Shape{
    private double radius; 

    public Circle(double radius){
        this.radius = radius; 
    }

    @Override
    public double getArea(){
        return Math.PI * radius * radius;
    }


}

class AreaCalculator {
    public double sumAreas(Shape[] shapes){
        double totalArea = 0; 
        for(Shape shape : shapes){
            totalArea += shape.getArea();
        }
        return totalArea;
    }
}

public class Main{
    public static void main(String[] args){
        Shape shapes[] = new Shape[2];
        shapes[0] = new Rectangle(2, 4);
        shapes[1] = new Circle(3);

        AreaCalculator calculator = new AreaCalculator();
        double totalArea = calculator.sumAreas(shapes);

        System.out.println("Total Area: " + totalArea);

    }
}