Accordion.getExpandedPane() has the following syntax.
public final TitledPane getExpandedPane()
In the following code shows how to use Accordion.getExpandedPane() method.
import javafx.application.Application; import javafx.beans.property.ObjectProperty; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Accordion; import javafx.scene.control.Button; import javafx.scene.control.TitledPane; import javafx.scene.paint.Color; import javafx.stage.Stage; // w ww . j av a 2s .com public class Main extends Application { public static void main(String[] args) { Application.launch(args); } @Override public void start(Stage primaryStage) { primaryStage.setTitle("Text Fonts"); Group g = new Group(); Scene scene = new Scene(g, 550, 250, Color.web("0x0000FF", 1.0)); TitledPane t1 = new TitledPane("T1", new Button("B1")); TitledPane t2 = new TitledPane("T2", new Button("B2")); TitledPane t3 = new TitledPane("T3", new Button("B3")); Accordion accordion = new Accordion(); accordion.getPanes().addAll(t1, t2, t3); TitledPane titledPane = accordion.getExpandedPane(); g.getChildren().add(accordion); primaryStage.setScene(scene); primaryStage.show(); } }