// Inheritance Project
// shapehierarchy Module
// Source code file: Circle.java
// Implements this inheritance hierarchy:
// Rectangle --> Shape <-- Circle
// Instance variables are set with the constructor.

public class Circle extends Shape {

    // Instance variable
    private double radius;

    // Constructor
    public Circle(int r, int g, int b, double rad) {
        super(r, g, b);
        radius = rad;
    }

    // For a circle, area = PI * r ^ 2
    public double getArea( ) {
        return Math.PI * Math.pow(radius, 2.0);
    }

    @Override
    public String toString( ) {
        return String.format("Circle -- Color %s Radius: %.4f",
                getColor( ), radius);
    }
}