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java.awt
Class MenuBar

java.lang.Object
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 +--java.awt.MenuComponent
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 +--java.awt.MenuBar

All Implemented Interfaces:

Accessible, MenuContainer, Serializable

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public class MenuBar

extends MenuComponent

implements MenuContainer, Accessible

Unsafe:

See Also:

Serialized Form

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menus

Vector menus

This field represents a vector of the actual menus that will be part of the MenuBar.

See Also:

countMenus()

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helpMenu

Menu helpMenu

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(), setHelpMenu()

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base

private static final String base

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nameCounter

private static int nameCounter

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serialVersionUID

private static final long serialVersionUID

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menuBarSerializedDataVersion

private int menuBarSerializedDataVersion

The MenuBar's serialized data version.

MenuBar

public MenuBar()
 throws HeadlessException

Suppressed: Creates a new menu bar.

See Also:

java.awt.GraphicsEnvironment#isHeadless

constructComponentName

String constructComponentName()

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

Overrides:

constructComponentName in class MenuComponent

Returns:

a name for this MenuComponent

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addNotify

public void addNotify()

Suppressed: 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.

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removeNotify

public void removeNotify()

Suppressed: 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:

removeNotify in class MenuComponent

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getHelpMenu

public Menu getHelpMenu()

Suppressed: Gets the help menu on the menu bar.

Returns:

the help menu on this menu bar.

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setHelpMenu

public void setHelpMenu(Menu m)

Suppressed: 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

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add

public Menu add(Menu m)

Suppressed: Adds the specified menu to the menu bar.

Parameters:

m - the menu to be added.

Returns:

the menu added.

See Also:

java.awt.MenuBar#remove(int), java.awt.MenuBar#remove(java.awt.MenuComponent)

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remove

public void remove(int index)

Suppressed: 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)

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remove

public void remove(MenuComponent m)

Suppressed: Removes the specified menu component from this menu bar.

Specified by:

remove in interface MenuContainer

Parameters:

m - the menu component to be removed.

See Also:

java.awt.MenuBar#add(java.awt.Menu)

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getMenuCount

public int getMenuCount()

Suppressed: Gets the number of menus on the menu bar.

Returns:

the number of menus on the menu bar.

Since:

JDK1.1

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countMenus

public int countMenus()

Suppressed: @deprecated As of JDK version 1.1, replaced by getMenuCount().

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getMenuCountImpl

final int getMenuCountImpl()

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getMenu

public Menu getMenu(int i)

Suppressed: Gets 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.

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getMenuImpl

final Menu getMenuImpl(int i)

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shortcuts

public Enumeration shortcuts()

Suppressed: Gets an enumeration of all menu shortcuts this menu bar is managing.

Returns:

an enumeration of menu shortcuts that this menu bar is managing.

Since:

JDK1.1

See Also:

java.awt.MenuShortcut

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getShortcutMenuItem

public MenuItem getShortcutMenuItem(MenuShortcut s)

Suppressed: 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.

Since:

JDK1.1

See Also:

java.awt.MenuItem, java.awt.MenuShortcut

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handleShortcut

boolean handleShortcut(KeyEvent e)

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deleteShortcut

public void deleteShortcut(MenuShortcut s)

Suppressed: Deletes the specified menu shortcut.

Parameters:

s - the menu shortcut to delete.

Since:

JDK1.1

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writeObject

private void writeObject(ObjectOutputStream s)
 throws ClassNotFoundException,
 IOException

Writes default serializable fields to stream.

Parameters:

s - the ObjectOutputStream to write

ClassNotFoundException

IOException

See Also:

AWTEventMulticaster.save(ObjectOutputStream, String, EventListener), readObject(java.io.ObjectInputStream)

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readObject

private void readObject(ObjectInputStream s)
 throws ClassNotFoundException,
 IOException,
 HeadlessException

Reads the ObjectInputStream. Unrecognized keys or values will be ignored.

Parameters:

s - the ObjectInputStream to read

ClassNotFoundException

IOException

HeadlessException

See Also:

java.awt.GraphicsEnvironment#isHeadless, readObject(java.io.ObjectInputStream)

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initIDs

private static void initIDs()

Initialize JNI field and method IDs

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getAccessibleContext

public AccessibleContext getAccessibleContext()

Suppressed: Gets 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:

getAccessibleContext in interface Accessible

Overrides:

getAccessibleContext in class MenuComponent

Returns:

an AccessibleAWTMenuBar that serves as the AccessibleContext of this MenuBar

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