menu with scrollbar

I want to use MenuBar with Scrollbar. I tried it. I dont know how to do it. so please help me. The program should be.... 1.add JScrollPane into the panel. 2.Panel layout should be null. 3.Use menubar 4.Each and every component should inside the panel. I tried it but menu bar is not working in this program. Here is the code......

import javax.swing.*; import java.awt.*; public class menu extends JFrame { MenuBar bar; Menu file,setting,rate,help,crate,prate; public menu() { JFrame frame =new JFrame("Stock Analysis");

bar=new MenuBar(); file=new Menu("File"); setting=new Menu("Setting"); rate=new Menu("Rate"); help=new Menu("Help");

setMenuBar(bar); bar.add(file); bar.add(rate); bar.add(setting); bar.add(help);

JPanel panel=new JPanel(); JButton b1=new JButton("Button1"); JButton b2=new JButton("Button2"); panel.setLayout(null); panel.setPreferredSize(new Dimension(1000, 1500));

b1.setBounds(100,100,150,50); b2.setBounds(100,200,150,50);

panel.add(b1); panel.add(b2);

JScrollPane s = new JScrollPane(panel); frame.add(s); frame.setVisible(true); frame.setSize(500,500); } public static void main(String arg[]) { menu m=new menu(); } }