Its seems, that hideOnClick does only work for ContextMenus, but not for normal Menus.
Tested with 2.2 and 8.0 b84.

See also this discussion:

https://forums.oracle.com/forums/thread.jspa?messageID=10957982

In this example, the menu hides on click, although I setHideOnClick(false).


import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;


public class TestApp4 extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(final Stage stage) throws Exception {
        VBox vBox = new VBox();
        MenuBar menuBar = new MenuBar();

        Menu menu = new Menu("test");

        CustomMenuItem customMenuItem = new CustomMenuItem(new Label("test"));
        customMenuItem.setHideOnClick(false);

        menu.getItems().add(customMenuItem);

        menuBar.getMenus().add(menu);

        vBox.getChildren().add(menuBar);
        Scene scene = new Scene(vBox);
        stage.setScene(scene);
        stage.show();
    }
}