Using JTS, how to find the nearest point on a polygon's boundary from an outside point?

Question

Using JTS, how to find the nearest point on a polygon's boundary from an outside point?

Answer 1

Check out the DistanceOp. It returns an array of Coordinates:

Coordinate[] pts = DistanceOp.closestPoints(poly, outsidePoint);

pts[0] will be the point on the first geometry (in this case the polygon) and pts[1] will be on the second geometry (so, the same outside point you just passed in).