import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;


public class Bug extends Application {
    
    public static void main(String[] args) {
        launch(args);
    }
    
    @Override
    public void start(Stage stage) throws Exception {
        
        ContextMenu contextMenu = new ContextMenu(new MenuItem("_My menu item"));
        
        TextArea textArea = new TextArea();
        textArea.setContextMenu(contextMenu);
        
        BorderPane borderPane = new BorderPane();
        borderPane.setCenter(textArea);
        
        Scene scene = new Scene(borderPane);
        
        stage.setTitle("MenuApp");
        stage.setScene(scene);
        stage.show();
    }
}