ChoiceBox.showingProperty() has the following syntax.
public final ReadOnlyBooleanProperty showingProperty()
In the following code shows how to use ChoiceBox.showingProperty() method.
import javafx.application.Application; import javafx.collections.FXCollections; import javafx.collections.ObservableList; import javafx.scene.Scene; import javafx.scene.control.ChoiceBox; import javafx.scene.layout.VBox; import javafx.stage.Stage; //from ww w. j ava2 s.co m public class Main extends Application { ObservableList<String> cursors = FXCollections.observableArrayList("a","b","c"); @Override public void start(Stage stage) { ChoiceBox<String> choiceBox = new ChoiceBox<String>(); choiceBox.setItems(cursors); System.out.println(choiceBox.showingProperty()); VBox box = new VBox(); box.getChildren().add(choiceBox); final Scene scene = new Scene(box,300, 250); scene.setFill(null); stage.setScene(scene); stage.show(); } public static void main(String[] args) { launch(args); } }