public class Polygon {
    private Point[] points;

    public Polygon(Point[] points) {
	this.points = new Point[points.length];
	for (int i = 0; i < points.length; i++) {
	    this.points[i] = points[i];
	}
    }

    public void draw(SimpleWindow w) {
	w.moveTo(points[0].getX(), points[0].getY());
	for (int i = 1; i < points.length; i++) {
	    w.lineTo(points[i].getX(), points[i].getY());
	}
	w.lineTo(points[0].getX(), points[0].getY());
    }

    public void addPoint(Point p) {
	Point[] newPoints = new Point[points.length + 1];
	for (int i = 0; i < points.length; i++) {
	    newPoints[i] = points[i];
	}
	newPoints[newPoints.length - 1] = p;
	points = newPoints;
    }
}