import javafx.scene.paint.Color;

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.Color;
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.Color;
public class Rectangle extends Shape
{
    private double length;
    private double width;
    
    public Rectangle(Color color, double length, double width) {
        super(color);
        this.length = length;
        this.width = width;
    }
    
    public double getArea() {
        return length * width;
    }
    
}

//----------------------------------------------------
import javafx.scene.paint.Color;
public class Triangle extends Shape
{
    private double height;
    private double base;
    
    public Triangle(Color color, double height, double base) {
        super(color);
        this.height = height;
        this.base = base;
    }
    
    public double getArea() {
        
        return 0.5 * height * base;
    }
}



//----------------------------------------------------
import javafx.scene.paint.Color;

public class TestProgram
{
   public static void main()
   {
       
        Color color = Color.RED;
        
        Circle c = new Circle(color,2);
        Triangle t = new Triangle(color,1,2);
        Rectangle r = new Rectangle(color,1,2);
        
       
        
        Shape[] shapes = new Shape[3];
        shapes[0] = c;
        shapes[1] = t;
        shapes[2] = r;

        for (Shape shape : shapes) {
            System.out.println(shape.getClass().getName() + " Area: " + shape.getArea());
        }
        
        
        
        //System.out.println(shapes[0].getClass().getName());
        //System.out.println(shapes[0].getClass().getCanonicalName());
        //System.out.println(shapes[0].getClass().getTypeName());
        
   }
}