public class Circle extends Shape {

    private double radius;

    public Circle(String color, double radius) {
        super(color);
        this.radius = radius;
    }

    public double getRadius() {
        return radius;
    }

    @Override
    public double area() {
        return (getRadius() * getRadius()) * Math.PI;
    }

    @Override
    public String toString() {
        return getColor() + " circle with a radius of " + getRadius() +
                " and an area of " + area() + ".";
    }
}