public class MenuItem extends MenuComponent implements Accessible
MenuItem, or one of its subclasses.
 
 The default MenuItem object embodies
 a simple labeled menu item.
 
 This picture of a menu bar shows five menu items:
  
 
 The first two items are simple menu items, labeled
 "Basic" and "Simple".
 Following these two items is a separator, which is itself
 a menu item, created with the label "-".
 Next is an instance of CheckboxMenuItem
 labeled "Check". The final menu item is a
 submenu labeled "More Examples",
 and this submenu is an instance of Menu.
 
 When a menu item is selected, AWT sends an action event to
 the menu item. Since the event is an
 instance of ActionEvent, the processEvent
 method examines the event and passes it along to
 processActionEvent. The latter method redirects the
 event to any ActionListener objects that have
 registered an interest in action events generated by this
 menu item.
 
 Note that the subclass Menu overrides this behavior and
 does not send any event to the frame until one of its subitems is
 selected.
| Modifier and Type | Class and Description | 
|---|---|
| protected class  | MenuItem.AccessibleAWTMenuItemInner class of MenuItem used to provide default support for
 accessibility. | 
MenuComponent.AccessibleAWTMenuComponent| Constructor and Description | 
|---|
| MenuItem()Constructs a new MenuItem with an empty label and no keyboard
 shortcut. | 
| MenuItem(String label)Constructs a new MenuItem with the specified label
 and no keyboard shortcut. | 
| MenuItem(String label,
        MenuShortcut s)Create a menu item with an associated keyboard shortcut. | 
| Modifier and Type | Method and Description | 
|---|---|
| void | addActionListener(ActionListener l)Adds the specified action listener to receive action events
 from this menu item. | 
| void | addNotify()Creates the menu item's peer. | 
| void | deleteShortcut()Delete any  MenuShortcutobject associated
 with this menu item. | 
| void | disable()Deprecated. 
 As of JDK version 1.1,
 replaced by  setEnabled(boolean). | 
| protected void | disableEvents(long eventsToDisable)Disables event delivery to this menu item for events
 defined by the specified event mask parameter. | 
| void | enable()Deprecated. 
 As of JDK version 1.1,
 replaced by  setEnabled(boolean). | 
| void | enable(boolean b)Deprecated. 
 As of JDK version 1.1,
 replaced by  setEnabled(boolean). | 
| protected void | enableEvents(long eventsToEnable)Enables event delivery to this menu item for events
 to be defined by the specified event mask parameter | 
| AccessibleContext | getAccessibleContext()Gets the AccessibleContext associated with this MenuItem. | 
| String | getActionCommand()Gets the command name of the action event that is fired
 by this menu item. | 
| ActionListener[] | getActionListeners()Returns an array of all the action listeners
 registered on this menu item. | 
| String | getLabel()Gets the label for this menu item. | 
| <T extends EventListener> | getListeners(Class<T> listenerType)Returns an array of all the objects currently registered
 as  FooListeners
 upon thisMenuItem. | 
| MenuShortcut | getShortcut()Get the  MenuShortcutobject associated with this
 menu item, | 
| boolean | isEnabled()Checks whether this menu item is enabled. | 
| String | paramString()Returns a string representing the state of this  MenuItem. | 
| protected void | processActionEvent(ActionEvent e)Processes action events occurring on this menu item,
 by dispatching them to any registered
  ActionListenerobjects. | 
| protected void | processEvent(AWTEvent e)Processes events on this menu item. | 
| void | removeActionListener(ActionListener l)Removes the specified action listener so it no longer receives
 action events from this menu item. | 
| void | setActionCommand(String command)Sets the command name of the action event that is fired
 by this menu item. | 
| void | setEnabled(boolean b)Sets whether or not this menu item can be chosen. | 
| void | setLabel(String label)Sets the label for this menu item to the specified label. | 
| void | setShortcut(MenuShortcut s)Set the  MenuShortcutobject associated with this
 menu item. | 
dispatchEvent, getFont, getName, getParent, getPeer, getTreeLock, postEvent, removeNotify, setFont, setName, toStringpublic MenuItem()
         throws HeadlessException
HeadlessException - if GraphicsEnvironment.isHeadless()
 returns true.GraphicsEnvironment.isHeadless()public MenuItem(String label) throws HeadlessException
label - the label for this menu item.HeadlessException - if GraphicsEnvironment.isHeadless()
 returns true.GraphicsEnvironment.isHeadless()public MenuItem(String label, MenuShortcut s) throws HeadlessException
label - the label for this menu item.s - the instance of MenuShortcut
                       associated with this menu item.HeadlessException - if GraphicsEnvironment.isHeadless()
 returns true.GraphicsEnvironment.isHeadless()public void addNotify()
public String getLabel()
null
                       if this menu item has no label.setLabel(java.lang.String)public void setLabel(String label)
label - the new label, or null for no label.getLabel()public boolean isEnabled()
setEnabled(boolean)public void setEnabled(boolean b)
b - if true, enables this menu item;
                       if false, disables it.isEnabled()@Deprecated public void enable()
setEnabled(boolean).@Deprecated public void enable(boolean b)
setEnabled(boolean).@Deprecated public void disable()
setEnabled(boolean).public MenuShortcut getShortcut()
MenuShortcut object associated with this
 menu item,null if none has been specified.setShortcut(java.awt.MenuShortcut)public void setShortcut(MenuShortcut s)
MenuShortcut object associated with this
 menu item. If a menu shortcut is already associated with
 this menu item, it is replaced.s - the menu shortcut to associate
                           with this menu item.getShortcut()public void deleteShortcut()
MenuShortcut object associated
 with this menu item.protected final void enableEvents(long eventsToEnable)
 Since event types are automatically enabled when a listener for
 that type is added to the menu item, this method only needs
 to be invoked by subclasses of MenuItem which desire to
 have the specified event types delivered to processEvent
 regardless of whether a listener is registered.
eventsToEnable - the event mask defining the event typesprocessEvent(java.awt.AWTEvent), 
disableEvents(long), 
Component.enableEvents(long)protected final void disableEvents(long eventsToDisable)
eventsToDisable - the event mask defining the event typesprocessEvent(java.awt.AWTEvent), 
enableEvents(long), 
Component.disableEvents(long)public void setActionCommand(String command)
By default, the action command is set to the label of the menu item.
command - the action command to be set
                                for this menu item.getActionCommand()public String getActionCommand()
setActionCommand(java.lang.String)public void addActionListener(ActionListener l)
Refer to AWT Threading Issues for details on AWT's threading model.
l - the action listener.removeActionListener(java.awt.event.ActionListener), 
getActionListeners(), 
ActionEvent, 
ActionListenerpublic void removeActionListener(ActionListener l)
Refer to AWT Threading Issues for details on AWT's threading model.
l - the action listener.addActionListener(java.awt.event.ActionListener), 
getActionListeners(), 
ActionEvent, 
ActionListenerpublic ActionListener[] getActionListeners()
ActionListeners
         or an empty array if no action
         listeners are currently registeredaddActionListener(java.awt.event.ActionListener), 
removeActionListener(java.awt.event.ActionListener), 
ActionEvent, 
ActionListenerpublic <T extends EventListener> T[] getListeners(Class<T> listenerType)
FooListeners
 upon this MenuItem.
 FooListeners are registered using the
 addFooListener method.
 
 You can specify the listenerType argument
 with a class literal, such as
 FooListener.class.
 For example, you can query a
 MenuItem m
 for its action listeners with the following code:
 
ActionListener[] als = (ActionListener[])(m.getListeners(ActionListener.class));If no such listeners exist, this method returns an empty array.
listenerType - the type of listeners requested; this parameter
          should specify an interface that descends from
          java.util.EventListenerFooListeners on this menu item,
          or an empty array if no such
          listeners have been addedClassCastException - if listenerType
          doesn't specify a class or interface that implements
          java.util.EventListenergetActionListeners()protected void processEvent(AWTEvent e)
ActionEvent, it invokes
 processActionEvent, another method
 defined by MenuItem.
 Currently, menu items only support action events.
Note that if the event parameter is null
 the behavior is unspecified and may result in an
 exception.
processEvent in class MenuComponente - the eventprocessActionEvent(java.awt.event.ActionEvent)protected void processActionEvent(ActionEvent e)
ActionListener objects.
 This method is not called unless action events are
 enabled for this component. Action events are enabled
 when one of the following occurs:
 ActionListener object is registered
 via addActionListener.
 enableEvents.
 Note that if the event parameter is null
 the behavior is unspecified and may result in an
 exception.
e - the action eventActionEvent, 
ActionListener, 
enableEvents(long)public String paramString()
MenuItem.
 This method is intended to be used only for debugging purposes, and the
 content and format of the returned string may vary between
 implementations. The returned string may be empty but may not be
 null.paramString in class MenuComponentpublic AccessibleContext getAccessibleContext()
getAccessibleContext in interface AccessiblegetAccessibleContext in class MenuComponent Submit a bug or feature 
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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