TilePane.getMargin(Node node) has the following syntax.
public static Insets getMargin(Node node)
In the following code shows how to use TilePane.getMargin(Node node) method.
/* www . ja v a 2 s .c om*/ import javafx.application.Application; import javafx.geometry.Insets; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.CheckBox; import javafx.scene.layout.HBox; import javafx.scene.layout.TilePane; import javafx.stage.Stage; public class Main extends Application { public static void main(String[] args) { launch(args); } @Override public void start(Stage stage) { Scene scene = new Scene(new Group(), 450, 250); TilePane tile = new TilePane(); tile.setHgap(8); tile.setPrefColumns(4); for (int i = 0; i < 20; i++) { tile.getChildren().add(new CheckBox("CheckBox")); } HBox hbox = new HBox(10); hbox.setPadding(new Insets(20, 0, 0, 20)); hbox.getChildren().setAll(tile); System.out.println(TilePane.getMargin(hbox)); Group root = (Group) scene.getRoot(); root.getChildren().add(hbox); stage.setScene(scene); stage.show(); } }