I have some polygon in jts topology library. if I want to draw on javafx pane I do:

 Polygon poly=new Polygon();//javafx
 //g is geometry of jts
    for (Coordinate coord : g.getCoordinates())
    {
        poly.getPoints().addAll(coord.x, coord.y);
    }

and got extra four edges that are not expected:

but the same data look good in test builder:

what is wrong? order of traversing the geometry? any ideas?