Thread: Menus will not appear in JMenubar

I have created 2 JMenus with various JButtons, JCheckboxes and a submenu. They are compiling and running ok. The problem is that they filling the full length of the JFrame, instead of appearing as two menus in a JMenubar which is what I need.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class MenuExample extends JFrame
{
	private JMenuBar menuBar;
	private JMenu menu, subMenu;
	private JMenuItem menuItem;
	private JRadioButtonMenuItem rbMenuItem;
	private JCheckBoxMenuItem cbMenuItem;
 
	public MenuExample()                                       						
	{
	   menuBar = new JMenuBar();																
 
		menu = new JMenu("A Menu");															
		menu.setMnemonic('A');
		menu.getAccessibleContext().setAccessibleDescription("The only menu in this program that has menu items");
		menuBar.add(menu);
 
		menuItem = new JMenuItem("A text-only menu item");
 
		menuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_1, ActionEvent.ALT_MASK));
		menuItem.getAccessibleContext().setAccessibleDescription("This doesn't really do anything");
		menu.add(menuItem);
 
		menuItem = new JMenuItem("Both text and icon", new ImageIcon("image/cross.gif"));
		menuItem.setMnemonic('B');
		menu.add(menuItem);
 
		menu.addSeparator();																		
		ButtonGroup group = new ButtonGroup();
		rbMenuItem = new JRadioButtonMenuItem("A radio button menu item");
		rbMenuItem.setSelected(true);
		rbMenuItem.setMnemonic('r');
		group.add(rbMenuItem);
		menu.add(rbMenuItem);
 
		rbMenuItem = new JRadioButtonMenuItem("Another one");
		rbMenuItem.setMnemonic('o');
		group.add(rbMenuItem);
		menu.add(rbMenuItem);
 
		menu.addSeparator();																		
		cbMenuItem = new JCheckBoxMenuItem("A check box menu item");
		cbMenuItem.setMnemonic('c');
		menu.add(cbMenuItem);  
 
		cbMenuItem = new JCheckBoxMenuItem("Another one");
		cbMenuItem.setMnemonic('h');
		menu.add(cbMenuItem); 
 
		menu.addSeparator();																		
		subMenu = new JMenu("A submenu");
		subMenu.setMnemonic('s');
		menu.add(subMenu);
 
		menuItem = new JMenuItem("An item in the submenu");
		menuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_2, ActionEvent.ALT_MASK));
		subMenu.add(menuItem);
 
		menuItem = new JMenuItem("Another item");
		subMenu.add(menuItem);
 
		subMenu = new JMenu("Another Menu");												 
		menuBar.add(menu);
		menuBar.add(subMenu);
		add(menuBar);
	}
 
	public static void main(String[] args) 
        {
	   MenuExample frame = new MenuExample();
	   frame.setTitle("Menu Example");
	   frame.setSize(300, 250);
	   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	   frame.setLocationRelativeTo(null);	 
	   frame.setVisible(true);
         }
}

I've tried adding 'frame.setJMenuBar(menuBar);' but it gives me an error. Am I on the right track?

MenuExample.java:87: non-static variable menuBar cannot be referenced from a static context
frame.setJMenuBar(menuBar);
^

Yes line 87 was in the main() method. I moved the code to the constructor, but now I am getting this error:

MenuExample.java:76: cannot find symbol
symbol : variable frame
location: class MenuExample
frame.setJMenuBar(menuBar);
^
(Line 76 is where I moved the code to the constructor)

I played around with the code and I removed 'frame.' from the setJMenuBar() method and it worked. Thanks man