public static void drawRectangle(Point sw, Point ne) {
        StdDraw.line(sw._x, sw._y, sw._x, ne._y);
        StdDraw.line(sw._x, ne._y, ne._x, ne._y);
        StdDraw.line(ne._x, ne._y, ne._x, sw._y);
        StdDraw.line(ne._x, sw._y, sw._x, sw._y);
  }