public class Circle implements Shape {
    private double radius;
    private String color;
    
    public Circle(double radius, String color) {
        this.radius = radius;
        this.color = color;
    }
    
    @Override
    public double calculateArea() {
        return Math.PI * radius * radius;
    }
    
    @Override
    public double calculatePerimeter() {
        return 2 * Math.PI * radius;
    }
    
    @Override
    public String getColor() {
        return color;
    }
    
    @Override
    public void setColor(String color) {
        this.color = color;
    }
    
    public double getRadius() {
        return radius;
    }
    
    public void setRadius(double radius) {
        this.radius = radius;
    }
}