import javafx.scene.paint.*;
public abstract class Shape {
    private Color color;

    public Shape(Color color) {
        this.color = color;
    }

    public Color getColor() {
        return color;
    }

    public void setColor(Color color) {
        this.color = color;
    }

    public abstract double getArea();
}





import javafx.scene.paint.*;
public class Circle extends Shape {
    private double radius;

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

    public double getRadius() {
        return radius;
    }

    public void setRadius(double radius) {
        this.radius = radius;
    }

    public double getArea() {
        return Math.PI * radius * radius;
    }
    
    
    public String toString() {
        return "I'm a circle of radius " + radius;
    }
}





import javafx.scene.paint.*;
public class TestProgram
{
   public static void main()
   {
       
        Color color = Color.RED;
        
        Circle c = new Circle(color,2);
        
        System.out.println(c);
        
   }
}