menu bar example as desktop

[coder java]

Hi I want to test menu bar example as desktop applicaiton how i can do .
i know this can be done int his way
public static void main(String[] args) {
        DesktopApplicationContext.main(Main.class, args);
    }

but Do i need declare one bxml file for window ?
if i declare how i can embeddd menu_bars.bxml into window .
I am very new to this pivot . please help me if any one have some idea
Regards
Sony