Problem With Menu Bar Appear

I wrote this program which should have a menu bar. However, it does not appear.
heres the code

Code:

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Desktop extends JFrame {	public static void main(String[] args) {  new Desktop();	}	public Desktop() {  super("Multiple Document Interface");  WindowUtilities.setNativeLookAndFeel();  addWindowListener(new ExitListener());  Container content = getContentPane();  //menu bar components  JMenuBar menu;  JMenu file;  JMenuItem newWindow;  JMenuItem close;  menu = new JMenuBar();  file = new JMenu("File");  newWindow = new JMenuItem("New Window");  close = new JMenuItem("Close");  menu.add(file);  file.add(newWindow);  file.add(close);  menu.setVisible(true);  content.setBackground(Color.white);  JDesktopPane desktop = new JDesktopPane();  desktop.setBackground(Color.white);  desktop.add(menu);  content.add(desktop, BorderLayout.CENTER);  setSize(600,600);  for(int i=1; i<6; i++) {        	JInternalFrame frame = new JInternalFrame(("Note " + i),true, true, true, true);        	frame.setLocation(i*50+10, i*50+10);        	frame.setSize(200, 150);        	frame.setBackground(Color.white);        	desktop.add(frame);        	frame.setVisible(true);  	frame.moveToFront();	  }	setVisible(true);	}}

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hey there! I think I get the problem here. You must have forgotten to set the menu bar. This might help:

menu.add(file);setJMenuBar(menu);