public class Main { public static void main(String[] args) { Shape c = new Circle(new Point(10, 10), 10); System.out.println(c); Shape l = new Line(new Point(0, 0), new Point(10, 10)); System.out.println(l); Shape p = new Polygon(new Point(0, 0), new Point(10, 10), new Point(-10, -10), new Point(5, 10), new Point(-5, -10)); System.out.println(p); } }