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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » java.awt

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

java.awt .MenuComponent

java.awt .MenuBar

MenuBar

public class MenuBar extends MenuComponent implements MenuContainer(Code)

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, MenuBar.shortcuts and MenuBar.getShortcutMenuItem that retrieve information about the shortcuts a given menu bar is managing.
version:
   1.56, 08/19/02
author:
   Sami Shaio
See Also:   java.awt.Frame
See Also:   java.awt.Frame.setMenuBar(java.awt.MenuBar)
See Also:   java.awt.Menu
See Also:   java.awt.MenuItem
See Also:   java.awt.MenuShortcut
since:
   JDK1.0

Field Summary
Menu	helpMenu This menu is a special menu dedicated to help.
Vector	menus This field represents a vector of the actual menus that will be part of the MenuBar.

Constructor Summary
public	MenuBar() Creates a new menu bar.

Method Summary
public Menu	add(Menu m) Adds the specified menu to the menu bar. Parameters: m - the menu to be added.
public void	addNotify() Creates the menu bar's peer.
String	constructComponentName() Construct a name for this MenuComponent.
public int	countMenus()
public void	deleteShortcut(MenuShortcut s) Deletes the specified menu shortcut.
public Menu	getHelpMenu() Gets the help menu on the menu bar.
public Menu	getMenu(int i) Gets the specified menu. Parameters: i - the index position of the menu to be returned.
public int	getMenuCount() Gets the number of menus on the menu bar.
public MenuItem	getShortcutMenuItem(MenuShortcut s) Gets the instance of `MenuItem` associated with the specified `MenuShortcut` object, or `null` if none of the menu items being managed by this menu bar is associated with the specified menu shortcut.
boolean	handleShortcut(KeyEvent e)
public void	remove(int index) Removes the menu located at the specified index from this menu bar.
public void	remove(MenuComponent m) Removes the specified menu component from this menu bar.
public void	removeNotify() Removes the menu bar's peer.
public void	setHelpMenu(Menu m) Sets the specified menu to be this menu bar's help menu.
public synchronized Enumeration	shortcuts() Gets an enumeration of all menu shortcuts this menu bar is managing.

Field Detail

helpMenu
Menu helpMenu(Code)
	This menu is a special menu dedicated to help. The one thing to note about this menu is that on some platforms it appears at the right edge of the menubar. See Also: getHelpMenu() See Also: setHelpMenu()

menus
Vector menus(Code)
	This field represents a vector of the actual menus that will be part of the MenuBar. See Also: countMenus()

Constructor Detail

MenuBar
public MenuBar()(Code)
	Creates a new menu bar.

Method Detail

add
public Menu add(Menu m)(Code)
	Adds the specified menu to the menu bar. Parameters: m - the menu to be added. the menu added. See Also: java.awt.MenuBar.remove(int) See Also: java.awt.MenuBar.remove(java.awt.MenuComponent) since: JDK1.0

addNotify
public void addNotify()(Code)
	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.

constructComponentName
String constructComponentName()(Code)
	Construct a name for this MenuComponent. Called by getName() when the name is null.

countMenus
public int countMenus()(Code)

deleteShortcut
public void deleteShortcut(MenuShortcut s)(Code)
	Deletes the specified menu shortcut. Parameters: s - the menu shortcut to delete. since: JDK1.1

getHelpMenu
public Menu getHelpMenu()(Code)
	Gets the help menu on the menu bar. the help menu on this menu bar.

getMenu
public Menu getMenu(int i)(Code)
	Gets the specified menu. Parameters: i - the index position of the menu to be returned. the menu at the specified index of this menu bar.

getMenuCount
public int getMenuCount()(Code)
	Gets the number of menus on the menu bar. the number of menus on the menu bar. since: JDK1.1

getShortcutMenuItem
public MenuItem getShortcutMenuItem(MenuShortcut s)(Code)
	Gets the instance of `MenuItem` associated with the specified `MenuShortcut` object, or `null` if none of the menu items being managed by this menu bar is associated with the specified menu shortcut. Parameters: s - the specified menu shortcut. See Also: java.awt.MenuItem See Also: java.awt.MenuShortcut since: JDK1.1

handleShortcut
boolean handleShortcut(KeyEvent e)(Code)

remove
public void remove(int index)(Code)
	Removes the menu located at the specified index from this menu bar. Parameters: index - the position of the menu to be removed. See Also: java.awt.MenuBar.add(java.awt.Menu)

remove
public void remove(MenuComponent m)(Code)
	Removes the specified menu component from this menu bar. Parameters: m - the menu component to be removed. See Also: java.awt.MenuBar.add(java.awt.Menu)

removeNotify
public void removeNotify()(Code)
	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.

setHelpMenu
public void setHelpMenu(Menu m)(Code)
	Sets 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

shortcuts
public synchronized Enumeration shortcuts()(Code)
	Gets an enumeration of all menu shortcuts this menu bar is managing. an enumeration of menu shortcuts that thismenu bar is managing. See Also: java.awt.MenuShortcut since: JDK1.1

Fields inherited from java.awt.MenuComponent

final static String actionListenerK(Code)(Java Doc)
transient AppContext appContext(Code)(Java Doc)
Font font(Code)(Java Doc)
final static String itemListenerK(Code)(Java Doc)
boolean newEventsOnly(Code)(Java Doc)
transient MenuContainer parent(Code)(Java Doc)
transient MenuComponentPeer peer(Code)(Java Doc)

Methods inherited from java.awt.MenuComponent

String constructComponentName()(Code)(Java Doc)
final public void dispatchEvent(AWTEvent e)(Code)(Java Doc)
void dispatchEventImpl(AWTEvent e)(Code)(Java Doc)
boolean eventEnabled(AWTEvent e)(Code)(Java Doc)
public Font getFont()(Code)(Java Doc)
public String getName()(Code)(Java Doc)
public MenuContainer getParent()(Code)(Java Doc)
final protected Object getTreeLock()(Code)(Java Doc)
protected String paramString()(Code)(Java Doc)
public boolean postEvent(Event evt)(Code)(Java Doc)
protected void processEvent(AWTEvent e)(Code)(Java Doc)
public void removeNotify()(Code)(Java Doc)
public void setFont(Font f)(Code)(Java Doc)
public void setName(String name)(Code)(Java Doc)
public String toString()(Code)(Java Doc)

Methods inherited from java.lang.Object

public boolean equals(Object obj)(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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