Polygon.getPoints() has the following syntax.
public final ObservableList <java.lang.Double> getPoints()
In the following code shows how to use Polygon.getPoints() method.
/*from w w w .j a va 2s . c o m*/ import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.shape.Polygon; import javafx.stage.Stage; public class Main extends Application { @Override public void start(Stage stage) { Group root = new Group(); Scene scene = new Scene(root, 260, 80); stage.setScene(scene); Group g = new Group(); Polygon polygon = new Polygon(0.0, 0.0,20.0, 10.0,10.0, 20.0); g.getChildren().add(polygon); System.out.println(polygon.getPoints()); scene.setRoot(g); stage.show(); } public static void main(String[] args) { launch(args); } }