Thread: menu bar is not appearing

import java.awt.*;
import javax.swing.JPanel;
import java.awt.event.*;
//import java.Color;
public class Project_notepad implements MouseListener,MouseMotionListener
{
		public Frame f;		//basic frame
	public MenuBar mb;		//menubar declaration
	private Menu File, Edit, Format,View, Findit;
	private MenuItem new_file,new_window,open,save,save_as, close, cut, copy, paste, case_convert, indent,font,style,size,underline,italic,bold,finds, incremental_find,replace;
	private CheckboxMenuItem status_bar,word_wrap,hide_menu_bar,full_screen;
	Label l1_menushow=new Label("show menu",Label.RIGHT);			//create label for menu show/hide
	Panel p1_menushow=new Panel();					//create panel for top part to use with label
 
	public Project_notepad()
	{
 
		f=new Frame();
		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();			//Dimension class object for setting max screen size
      	f.setBounds(0,0,screenSize.width, screenSize.height);						
 
		p1_menushow.setLayout(new BorderLayout());
 
 
 
		l1_menushow.setSize(5,5);
 
 
		p1_menushow.add(l1_menushow,BorderLayout.NORTH);						//add label to top panel
 
		//l1_menushow.setVisible(false);
 
 
		f.addMouseListener(this);
		f.addMouseMotionListener(this);
		f.add(p1_menushow);
      	f.setVisible(true);
	}
 
 
	public void mouseEntered(MouseEvent e)
	{
		Object o=e.getSource();
		if(o==l1_menushow)
		{
			create_menu();
		}
	}
	public void mouseExited(MouseEvent e)
	{
		Object o=e.getSource();
		if(o==l1_menushow)
		{
			//f.removeMenuBar();
 
		}
	}
	public void mouseClicked(MouseEvent e)
	{
		Object o=e.getSource();
		if(o==l1_menushow)
		{
			create_menu();
		}
	}
	public void mousePressed(MouseEvent e)
	{
 
	}
	public void mouseReleased(MouseEvent e)
	{
 
	}
	public void mouseMoved(MouseEvent e)
	{
 
	}
	public void mouseDragged(MouseEvent e)
	{
 
	}
 
 
	private void create_menu()									
	{															//menu bar creation
		mb=new MenuBar();										//menu bar declaration
      	File=new Menu("File");
      	Edit=new Menu("Edit");
      	Format=new Menu("Format");
      	View=new Menu("View");
      	Findit=new Menu("Find");
 
      	new_file=new MenuItem("new file");						//menu items declaration
      	new_window=new MenuItem("new window");
      	open=new MenuItem("open");
      	save=new MenuItem("save");
      	save_as=new MenuItem("save as");
      	close=new MenuItem("close");
      	cut=new MenuItem("cut");
      	copy=new MenuItem("copy");
      	paste=new MenuItem("paste");
      	case_convert=new MenuItem("case convert");
      	indent=new MenuItem("indent");
      	font=new MenuItem("font");
      	style=new MenuItem("style");
      	size=new MenuItem("size");
      	underline=new MenuItem("underline");
      	italic=new MenuItem("italic");
      	bold=new MenuItem("bold");
      	incremental_find=new MenuItem("incremental_find");
      	replace=new MenuItem("replace");
      	finds = new MenuItem("finds");
      	status_bar=new CheckboxMenuItem("status bar");							//chechkbox items declaration
      	word_wrap=new CheckboxMenuItem("word wrap");
      	hide_menu_bar=new CheckboxMenuItem("hide menu bar");
      	full_screen=new CheckboxMenuItem("full screen");
 
 
      	File.add(new_file);												//adding items to menu bar
      	File.add(new_window);
      	File.add(open);
      	File.add(save);
      	File.add(save_as);
      	File.add(close);
      	Edit.add(copy);
		Edit.add(paste);
		Edit.add(case_convert);
		Edit.add(indent);
		Format.add(font);
		Format.add(style);
		Format.add(size);
		Format.add(underline);
		Format.add(italic);
		Format.add(bold);
		Findit.add(finds);
		Findit.add(incremental_find);
		Findit.add(replace);
		View.add(status_bar);
		View.add(word_wrap);
		View.add(hide_menu_bar);
		View.add(full_screen);
 
 
		mb.add(File);										
		mb.add(Edit);
		mb.add(Format);
		mb.add(View);
		mb.add(Findit);
 
		f.setMenuBar(mb);
 
	}
 
	public static void main(String args[])
	{
		Project_notepad pr=new Project_notepad();
	}
 
 
 
}

here i am trying to create menu bar.it appears when i move my mouse to label "show menu" and should disapper on removing.
but there are two problems-
1.menubar is not appearing.
2.what is the method to remove entire menubar in awt package?
thanks in advance.

but is there any way to remove entire menu bar after creating it once in awt?

what do java libraries say???
if there exists a method to do so,i can test easily.

It seems there do not exists a method for that..
It's available in swing but not in awt..
that's aweful..
if anybody else finds ever a method to do so,please let me know.

Because i am going according to my curriculum of the college and i have only core java,not advance java.But i will move to it after gaining a deep knowledge in core java due to my interest and the features of graphic interface.