java.lang.Object
java.awt.MenuComponent
java.awt.MenuBar
- All Implemented Interfaces:
- MenuContainer,- Serializable,- Accessible
The 
MenuBar class encapsulates the platform's
 concept of a menu bar bound to a frame. In order to associate
 the menu bar with a Frame object, call the
 frame's setMenuBar method.
 This is what a menu bar might look like:
  
 
 A menu bar handles keyboard shortcuts for menu items, passing them
 along to its child menus.
 (Keyboard shortcuts, which are optional, provide the user with
 an alternative to the mouse for invoking a menu item and the
 action that is associated with it.)
 Each menu item can maintain an instance of MenuShortcut.
 The MenuBar class defines several methods,
 shortcuts() and
 getShortcutMenuItem(java.awt.MenuShortcut)
 that retrieve information about the shortcuts a given
 menu bar is managing.
- Since:
- 1.0
- See Also:
- 
Nested Class SummaryNested ClassesModifier and TypeClassDescriptionprotected classInner class of MenuBar used to provide default support for accessibility.Nested classes/interfaces declared in class java.awt.MenuComponentMenuComponent.AccessibleAWTMenuComponent
- 
Constructor SummaryConstructors
- 
Method SummaryModifier and TypeMethodDescriptionAdds the specified menu to the menu bar.voidCreates the menu bar's peer.intDeprecated.voidDeletes the specified menu shortcut.Gets the AccessibleContext associated with this MenuBar.Gets the help menu on the menu bar.getMenu(int i) Gets the specified menu.intGets the number of menus on the menu bar.Gets the instance ofMenuItemassociated with the specifiedMenuShortcutobject, ornullif none of the menu items being managed by this menu bar is associated with the specified menu shortcut.voidremove(int index) Removes the menu located at the specified index from this menu bar.voidRemoves the specified menu component from this menu bar.voidRemoves the menu bar's peer.voidsetHelpMenu(Menu m) Sets the specified menu to be this menu bar's help menu.Gets an enumeration of all menu shortcuts this menu bar is managing.Methods declared in class java.awt.MenuComponentdispatchEvent, getFont, getName, getParent, getTreeLock, paramString, postEvent, processEvent, setFont, setName, toStringMethods declared in class java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitMethods declared in interface java.awt.MenuContainergetFont, postEvent
- 
Constructor Details- 
MenuBarCreates a new menu bar.- Throws:
- HeadlessException- if GraphicsEnvironment.isHeadless() returns true.
- See Also:
 
 
- 
- 
Method Details- 
addNotifypublic void addNotify()Creates the menu bar's peer. The peer allows us to change the appearance of the menu bar without changing any of the menu bar's functionality.
- 
removeNotifypublic void removeNotify()Removes the menu bar's peer. The peer allows us to change the appearance of the menu bar without changing any of the menu bar's functionality.- Overrides:
- removeNotifyin class- MenuComponent
 
- 
getHelpMenuGets the help menu on the menu bar.- Returns:
- the help menu on this menu bar.
 
- 
setHelpMenuSets the specified menu to be this menu bar's help menu. If this menu bar has an existing help menu, the old help menu is removed from the menu bar, and replaced with the specified menu.- Parameters:
- m- the menu to be set as the help menu
 
- 
addAdds the specified menu to the menu bar. If the menu has been part of another menu bar, removes it from that menu bar.- Parameters:
- m- the menu to be added
- Returns:
- the menu added
- See Also:
 
- 
removepublic void remove(int index) Removes the menu located at the specified index from this menu bar.- Parameters:
- index- the position of the menu to be removed.
- See Also:
 
- 
removeRemoves the specified menu component from this menu bar.- Specified by:
- removein interface- MenuContainer
- Parameters:
- m- the menu component to be removed.
- See Also:
 
- 
getMenuCountpublic int getMenuCount()Gets the number of menus on the menu bar.- Returns:
- the number of menus on the menu bar.
- Since:
- 1.1
 
- 
countMenusDeprecated.As of JDK version 1.1, replaced bygetMenuCount().Gets the number of menus on the menu bar.- Returns:
- the number of menus on the menu bar.
 
- 
getMenuGets the specified menu.- Parameters:
- i- the index position of the menu to be returned.
- Returns:
- the menu at the specified index of this menu bar.
 
- 
shortcutsGets an enumeration of all menu shortcuts this menu bar is managing.- Returns:
- an enumeration of menu shortcuts that this menu bar is managing.
- Since:
- 1.1
- See Also:
 
- 
getShortcutMenuItemGets the instance ofMenuItemassociated with the specifiedMenuShortcutobject, ornullif none of the menu items being managed by this menu bar is associated with the specified menu shortcut.- Parameters:
- s- the specified menu shortcut.
- Returns:
- the menu item for the specified shortcut.
- Since:
- 1.1
- See Also:
 
- 
deleteShortcutDeletes the specified menu shortcut.- Parameters:
- s- the menu shortcut to delete.
- Since:
- 1.1
 
- 
getAccessibleContextGets the AccessibleContext associated with this MenuBar. For menu bars, the AccessibleContext takes the form of an AccessibleAWTMenuBar. A new AccessibleAWTMenuBar instance is created if necessary.- Specified by:
- getAccessibleContextin interface- Accessible
- Overrides:
- getAccessibleContextin class- MenuComponent
- Returns:
- an AccessibleAWTMenuBar that serves as the AccessibleContext of this MenuBar
- Since:
- 1.3
 
 
- 
getMenuCount().