CheckMenuItem.setSelected(boolean value) has the following syntax.
public final void setSelected(boolean value)
In the following code shows how to use CheckMenuItem.setSelected(boolean value) method.
import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.CheckMenuItem; import javafx.scene.control.CheckMenuItemBuilder; import javafx.scene.control.Menu; import javafx.scene.control.MenuBar; import javafx.scene.image.Image; import javafx.scene.image.ImageView; import javafx.scene.paint.Color; import javafx.stage.Stage; // w ww.jav a 2 s . c o m public class Main extends Application { public static void main(String[] args) { Application.launch(args); } @Override public void start(Stage primaryStage) { primaryStage.setTitle("Menus"); Group root = new Group(); Scene scene = new Scene(root, 300, 250, Color.WHITE); MenuBar menuBar = new MenuBar(); Menu tools = new Menu("Your Menu"); Image image = new Image(getClass().getResourceAsStream("a.png")); CheckMenuItem item = new CheckMenuItem("Item 1",new ImageView(image)); tools.getItems().add(item); item.setSelected(true); tools.getItems().add(CheckMenuItemBuilder.create() .text("Item 2") .selected(true) .build()); menuBar.getMenus().add(tools); menuBar.prefWidthProperty().bind(primaryStage.widthProperty()); root.getChildren().add(menuBar); primaryStage.setScene(scene); primaryStage.show(); } }