GarciaPL

public boolean sprawdzObiektwObszarze(ArrayList<Coordinate> obszar, Coordinate abonent) {
        final GeometryFactory gf = new GeometryFactory();
        LinearRing linearring = new LinearRing(new CoordinateArraySequence
(obszar.toArray(newCoordinate[obszar.size()])), gf);
        final Polygon polygon = gf.createPolygon(linearring, null);
        final Point point = gf.createPoint(abonent);
        return point.within(polygon);
    }