MenuBar

Name

Description

A MenuBar holds menus. MenuBars are always attached to frames, and displayed on the top line of the Frame. One menu in a MenuBar may be designated a "help" menu.

Class Definition

public class java.awt.MenuBar extends java.awt.MenuComponent implements java.awt.MenuContainer {
 // Constructors public MenuBar(); // Instance Methods public synchronized Menu add (Menu m);
public void addNotify();
public int countMenus();  public void deleteShortcut (MenuShortcut s); public Menu getHelpMenu();
public Menu getMenu (int index);
public int getMenuCount(); public MenuItem getShortcutMenuItem (MenuShortcut s); public synchronized void remove (int index);
public synchronized void remove (MenuComponent component);
public void removeNotify();
public synchronized void setHelpMenu (Menu m);
public synchronized Enumeration shortcuts();
}

Constructors

MenuBar

public MenuBar()

• Description
• Constructs a MenuBar object.

Instance Methods

add

public synchronized Menu add (Menu m)

• Parameters
• • m
  • A Menu to add to MenuBar.
• Returns
• Item just added.
• Description
• Adds a new menu to the MenuBar.

addNotify

public void addNotify()

• Description
• Creates MenuBar's peer and peers of contained menus.

countMenus

public int countMenus()

• Returns
• The number of menus on the menu bar. Replaced by getMenuCount().

deleteShortcut

public void deleteShortcut (MenuShortcut s)

• Parameters
• • s
  • The shortcut to remove.
• Description
• Removes a menu shortcut.

getHelpMenu

public Menu getHelpMenu()

• Returns
• The menu that was designated the help menu.

getMenu

public Menu getMenu (int index)

• Parameters
• • index
  • The position of the Menu to fetch.
• Returns
• The Menu at the designated position.

getMenuCount

public int getMenuCount()

• Returns
• The number of menus on the menu bar.

getShortcutMenuItem

public MenuItem getShortcutMenuItem (MenuShortcut s)

• Parameters
• • s
  • A menu shortcut.
• Returns
• The corresponding menu item.
• Description
• Finds the MenuItem corresponding to the given MenuShortcut, or null if no match is found.

remove

public synchronized void remove (int index)

• Parameters
• • index
  • The position of the Menu to remove.
• Description
• Removes a Menu from the MenuBar.

public synchronized void remove (MenuComponent component)

• Parameters
• • component
  • The element of the MenuBar to remove.
• Implements
• MenuContainer.remove()
• Description
• Removes a Menu from the MenuBar.

removeNotify

public void removeNotify()

• Description
• Destroys the MenuBar peer, and peers for all Menu objects that appear on it.

setHelpMenu

public synchronized void setHelpMenu (Menu m)

• Parameters
• • m
  • Menu to designate as the help menu.
• Description
• Designates a Menu as the MenuBar's help menu.

shortcuts

public synchronized Enumeration shortcuts()

• Returns
• An Enumeration of MenuShortcut objects.
• Description
• Returns an Enumeration of all MenuShortcut objects managed by this MenuBar.

See Also

Frame, Menu, MenuComponent, MenuContainer