public class TryPolyLine {
  public static void main(String[] args) {
    // Create an array of coordinate pairs
    double[][] coords = { {1, 1}, {1, 2}, { 2, 3},
                          {-3, 5}, {-5, 1}, {0, 0} };

    // Create a polyline from the coordinates and display it
    PolyLine polygon = new PolyLine(coords);
    System.out.println(polygon);
    // Add a point and display the polyline again
    polygon.addPoint(10, 10);
    System.out.println(polygon);

    // Create Point objects from the coordinate array
    Point[] points = new Point[coords.length];
    for(int i = 0; i < points.length; ++i)
    points[i] = new Point(coords[i][0],coords[i][1]);

    // Use the points to create a new polyline and display it
    PolyLine newPoly = new PolyLine(points);
    System.out.println(newPoly);
  }
}