javax.swing

## Class JMenu

- java.lang.Object
- - java.awt.Component
  - - java.awt.Container
    - - javax.swing.JComponent
      - - javax.swing.AbstractButton
        - - javax.swing.JMenuItem
          - - javax.swing.JMenu

- All Implemented Interfaces:
    ImageObserver, ItemSelectable, MenuContainer, Serializable, Accessible, MenuElement, SwingConstants

      public class JMenu
      extends JMenuItem
      implements Accessible, MenuElement

  An implementation of a menu -- a popup window containing `JMenuItem`s that is displayed when the user selects an item on the `JMenuBar`. In addition to `JMenuItem`s, a `JMenu` can also contain `JSeparator`s.

  In essence, a menu is a button with an associated `JPopupMenu`. When the "button" is pressed, the `JPopupMenu` appears. If the "button" is on the `JMenuBar`, the menu is a top-level window. If the "button" is another menu item, then the `JPopupMenu` is "pull-right" menu.

  Menus can be configured, and to some degree controlled, by `Action`s. Using an `Action` with a menu has many benefits beyond directly configuring a menu. Refer to Swing Components Supporting `Action` for more details, and you can find more information in How to Use Actions, a section in The Java Tutorial.

  For information and examples of using menus see How to Use Menus, a section in The Java Tutorial.

  Warning: Swing is not thread safe. For more information see Swing's Threading Policy.

  Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the `java.beans` package. Please see `XMLEncoder`.

  See Also:
    `JMenuItem`, `JSeparator`, `JMenuBar`, `JPopupMenu`

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `protected class` | `JMenu.AccessibleJMenu` This class implements accessibility support for the `JMenu` class.
    `protected class` | `JMenu.WinListener` A listener class that watches for a popup window closing.

    - ### Nested classes/interfaces inherited from class javax.swing.JMenuItem

      `JMenuItem.AccessibleJMenuItem`

    - ### Nested classes/interfaces inherited from class javax.swing.AbstractButton

      `AbstractButton.AccessibleAbstractButton, AbstractButton.ButtonChangeListener`

    - ### Nested classes/interfaces inherited from class javax.swing.JComponent

      `JComponent.AccessibleJComponent`

    - ### Nested classes/interfaces inherited from class java.awt.Container

      `Container.AccessibleAWTContainer`

    - ### Nested classes/interfaces inherited from class java.awt.Component

      `Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected JMenu.WinListener` | `popupListener` The window-closing listener for the popup.

    - ### Fields inherited from class javax.swing.AbstractButton

      `actionListener, BORDER_PAINTED_CHANGED_PROPERTY, changeEvent, changeListener, CONTENT_AREA_FILLED_CHANGED_PROPERTY, DISABLED_ICON_CHANGED_PROPERTY, DISABLED_SELECTED_ICON_CHANGED_PROPERTY, FOCUS_PAINTED_CHANGED_PROPERTY, HORIZONTAL_ALIGNMENT_CHANGED_PROPERTY, HORIZONTAL_TEXT_POSITION_CHANGED_PROPERTY, ICON_CHANGED_PROPERTY, itemListener, MARGIN_CHANGED_PROPERTY, MNEMONIC_CHANGED_PROPERTY, model, MODEL_CHANGED_PROPERTY, PRESSED_ICON_CHANGED_PROPERTY, ROLLOVER_ENABLED_CHANGED_PROPERTY, ROLLOVER_ICON_CHANGED_PROPERTY, ROLLOVER_SELECTED_ICON_CHANGED_PROPERTY, SELECTED_ICON_CHANGED_PROPERTY, TEXT_CHANGED_PROPERTY, VERTICAL_ALIGNMENT_CHANGED_PROPERTY, VERTICAL_TEXT_POSITION_CHANGED_PROPERTY`

    - ### Fields inherited from class javax.swing.JComponent

      `listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW`

    - ### Fields inherited from class java.awt.Component

      `accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT`

    - ### Fields inherited from interface javax.swing.SwingConstants

      `BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST`

    - ### Fields inherited from interface java.awt.image.ImageObserver

      `ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `JMenu()` Constructs a new `JMenu` with no text.
    `JMenu(Action a)` Constructs a menu whose properties are taken from the `Action` supplied.
    `JMenu(String s)` Constructs a new `JMenu` with the supplied string as its text.
    `JMenu(String s, boolean b)` Constructs a new `JMenu` with the supplied string as its text and specified as a tear-off menu or not.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `JMenuItem` | `add(Action a)` Creates a new menu item attached to the specified `Action` object and appends it to the end of this menu.
    `Component` | `add(Component c)` Appends a component to the end of this menu.
    `Component` | `add(Component c, int index)` Adds the specified component to this container at the given position.
    `JMenuItem` | `add(JMenuItem menuItem)` Appends a menu item to the end of this menu.
    `JMenuItem` | `add(String s)` Creates a new menu item with the specified text and appends it to the end of this menu.
    `void` | `addMenuListener(MenuListener l)` Adds a listener for menu events.
    `void` | `addSeparator()` Appends a new separator to the end of the menu.
    `void` | `applyComponentOrientation(ComponentOrientation o)` Sets the `ComponentOrientation` property of this menu and all components contained within it.
    `protected PropertyChangeListener` | `createActionChangeListener(JMenuItem b)` Returns a properly configured `PropertyChangeListener` which updates the control as changes to the `Action` occur.
    `protected JMenuItem` | `createActionComponent(Action a)` Factory method which creates the `JMenuItem` for `Action`s added to the `JMenu`.
    `protected JMenu.WinListener` | `createWinListener(JPopupMenu p)` Creates a window-closing listener for the popup.
    `void` | `doClick(int pressTime)` Programmatically performs a "click".
    `protected void` | `fireMenuCanceled()` Notifies all listeners that have registered interest for notification on this event type.
    `protected void` | `fireMenuDeselected()` Notifies all listeners that have registered interest for notification on this event type.
    `protected void` | `fireMenuSelected()` Notifies all listeners that have registered interest for notification on this event type.
    `AccessibleContext` | `getAccessibleContext()` Gets the AccessibleContext associated with this JMenu.
    `Component` | `getComponent()` Returns the `java.awt.Component` used to paint this `MenuElement`.
    `int` | `getDelay()` Returns the suggested delay, in milliseconds, before submenus are popped up or down.
    `JMenuItem` | `getItem(int pos)` Returns the `JMenuItem` at the specified position.
    `int` | `getItemCount()` Returns the number of items on the menu, including separators.
    `Component` | `getMenuComponent(int n)` Returns the component at position `n`.
    `int` | `getMenuComponentCount()` Returns the number of components on the menu.
    `Component[]` | `getMenuComponents()` Returns an array of `Component`s of the menu's subcomponents.
    `MenuListener[]` | `getMenuListeners()` Returns an array of all the `MenuListener`s added to this JMenu with addMenuListener().
    `JPopupMenu` | `getPopupMenu()` Returns the popupmenu associated with this menu.
    `protected Point` | `getPopupMenuOrigin()` Computes the origin for the `JMenu`'s popup menu.
    `MenuElement[]` | `getSubElements()` Returns an array of `MenuElement`s containing the submenu for this menu component.
    `String` | `getUIClassID()` Returns the name of the L&F class that renders this component.
    `JMenuItem` | `insert(Action a, int pos)` Inserts a new menu item attached to the specified `Action` object at a given position.
    `JMenuItem` | `insert(JMenuItem mi, int pos)` Inserts the specified `JMenuitem` at a given position.
    `void` | `insert(String s, int pos)` Inserts a new menu item with the specified text at a given position.
    `void` | `insertSeparator(int index)` Inserts a separator at the specified position.
    `boolean` | `isMenuComponent(Component c)` Returns true if the specified component exists in the submenu hierarchy.
    `boolean` | `isPopupMenuVisible()` Returns true if the menu's popup window is visible.
    `boolean` | `isSelected()` Returns true if the menu is currently selected (highlighted).
    `boolean` | `isTearOff()` Returns true if the menu can be torn off.
    `boolean` | `isTopLevelMenu()` Returns true if the menu is a 'top-level menu', that is, if it is the direct child of a menubar.
    `void` | `menuSelectionChanged(boolean isIncluded)` Messaged when the menubar selection changes to activate or deactivate this menu.
    `protected String` | `paramString()` Returns a string representation of this `JMenu`.
    `protected void` | `processKeyEvent(KeyEvent evt)` Processes key stroke events such as mnemonics and accelerators.
    `void` | `remove(Component c)` Removes the component `c` from this menu.
    `void` | `remove(int pos)` Removes the menu item at the specified index from this menu.
    `void` | `remove(JMenuItem item)` Removes the specified menu item from this menu.
    `void` | `removeAll()` Removes all menu items from this menu.
    `void` | `removeMenuListener(MenuListener l)` Removes a listener for menu events.
    `void` | `setAccelerator(KeyStroke keyStroke)` `setAccelerator` is not defined for `JMenu`.
    `void` | `setComponentOrientation(ComponentOrientation o)` Sets the language-sensitive orientation that is to be used to order the elements or text within this component.
    `void` | `setDelay(int d)` Sets the suggested delay before the menu's `PopupMenu` is popped up or down.
    `void` | `setMenuLocation(int x, int y)` Sets the location of the popup component.
    `void` | `setModel(ButtonModel newModel)` Sets the data model for the "menu button" -- the label that the user clicks to open or close the menu.
    `void` | `setPopupMenuVisible(boolean b)` Sets the visibility of the menu's popup.
    `void` | `setSelected(boolean b)` Sets the selection status of the menu.
    `void` | `updateUI()` Resets the UI property with a value from the current look and feel.

    - ### Methods inherited from class javax.swing.JMenuItem

      `actionPropertyChanged, addMenuDragMouseListener, addMenuKeyListener, configurePropertiesFromAction, fireMenuDragMouseDragged, fireMenuDragMouseEntered, fireMenuDragMouseExited, fireMenuDragMouseReleased, fireMenuKeyPressed, fireMenuKeyReleased, fireMenuKeyTyped, getAccelerator, getMenuDragMouseListeners, getMenuKeyListeners, init, isArmed, processKeyEvent, processMenuDragMouseEvent, processMenuKeyEvent, processMouseEvent, removeMenuDragMouseListener, removeMenuKeyListener, setArmed, setEnabled, setUI`

    - ### Methods inherited from class javax.swing.AbstractButton

      `addActionListener, addChangeListener, addImpl, addItemListener, checkHorizontalKey, checkVerticalKey, createActionListener, createActionPropertyChangeListener, createChangeListener, createItemListener, doClick, fireActionPerformed, fireItemStateChanged, fireStateChanged, getAction, getActionCommand, getActionListeners, getChangeListeners, getDisabledIcon, getDisabledSelectedIcon, getDisplayedMnemonicIndex, getHideActionText, getHorizontalAlignment, getHorizontalTextPosition, getIcon, getIconTextGap, getItemListeners, getLabel, getMargin, getMnemonic, getModel, getMultiClickThreshhold, getPressedIcon, getRolloverIcon, getRolloverSelectedIcon, getSelectedIcon, getSelectedObjects, getText, getUI, getVerticalAlignment, getVerticalTextPosition, imageUpdate, isBorderPainted, isContentAreaFilled, isFocusPainted, isRolloverEnabled, paintBorder, removeActionListener, removeChangeListener, removeItemListener, removeNotify, setAction, setActionCommand, setBorderPainted, setContentAreaFilled, setDisabledIcon, setDisabledSelectedIcon, setDisplayedMnemonicIndex, setFocusPainted, setHideActionText, setHorizontalAlignment, setHorizontalTextPosition, setIcon, setIconTextGap, setLabel, setLayout, setMargin, setMnemonic, setMnemonic, setMultiClickThreshhold, setPressedIcon, setRolloverEnabled, setRolloverIcon, setRolloverSelectedIcon, setSelectedIcon, setText, setUI, setVerticalAlignment, setVerticalTextPosition`

    - ### Methods inherited from class javax.swing.JComponent

      `addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update`

    - ### Methods inherited from class java.awt.Container

      `add, add, add, addContainerListener, addPropertyChangeListener, addPropertyChangeListener, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, transferFocusDownCycle, validate, validateTree`

    - ### Methods inherited from class java.awt.Component

      `action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface javax.swing.MenuElement

      `processKeyEvent, processMouseEvent`

- - ### Field Detail

    - #### popupListener

          protected JMenu.WinListener popupListener

      The window-closing listener for the popup.
      See Also:
        `JMenu.WinListener`

  - ### Constructor Detail

    - #### JMenu

          public JMenu()

      Constructs a new `JMenu` with no text.

    - #### JMenu

          public JMenu(String s)

      Constructs a new `JMenu` with the supplied string as its text.
      Parameters:
        `s` - the text for the menu label

    - #### JMenu

          public JMenu(Action a)

      Constructs a menu whose properties are taken from the `Action` supplied.
      Parameters:
        `a` - an `Action`
      Since:
        1.3

    - #### JMenu

          public JMenu(String s,
                       boolean b)

      Constructs a new `JMenu` with the supplied string as its text and specified as a tear-off menu or not.
      Parameters:
        `s` - the text for the menu label
        `b` - can the menu be torn off (not yet implemented)

  - ### Method Detail

    - #### updateUI

          public void updateUI()

      Resets the UI property with a value from the current look and feel.
      Overrides:
        `updateUI` in class `JMenuItem`
      See Also:
        `JComponent.updateUI()`

    - #### getUIClassID

          public String getUIClassID()

      Returns the name of the L&F class that renders this component.
      Overrides:
        `getUIClassID` in class `JMenuItem`
      Returns:
        the string "MenuUI"
      See Also:
        `JComponent.getUIClassID()`, `UIDefaults.getUI(javax.swing.JComponent)`

    - #### setModel

          public void setModel(ButtonModel newModel)

      Sets the data model for the "menu button" -- the label that the user clicks to open or close the menu.
      Overrides:
        `setModel` in class `JMenuItem`
      Parameters:
        `newModel` - the `ButtonModel`
      See Also:
        `AbstractButton.getModel()`

    - #### isSelected

          public boolean isSelected()

      Returns true if the menu is currently selected (highlighted).
      Overrides:
        `isSelected` in class `AbstractButton`
      Returns:
        true if the menu is selected, else false

    - #### setSelected

          public void setSelected(boolean b)

      Sets the selection status of the menu.
      Overrides:
        `setSelected` in class `AbstractButton`
      Parameters:
        `b` - true to select (highlight) the menu; false to de-select the menu

    - #### isPopupMenuVisible

          public boolean isPopupMenuVisible()

      Returns true if the menu's popup window is visible.
      Returns:
        true if the menu is visible, else false

    - #### setPopupMenuVisible

          public void setPopupMenuVisible(boolean b)

      Sets the visibility of the menu's popup. If the menu is not enabled, this method will have no effect.
      Parameters:
        `b` - a boolean value -- true to make the menu visible, false to hide it

    - #### getPopupMenuOrigin

          protected Point getPopupMenuOrigin()

      Computes the origin for the `JMenu`'s popup menu. This method uses Look and Feel properties named `Menu.menuPopupOffsetX`, `Menu.menuPopupOffsetY`, `Menu.submenuPopupOffsetX`, and `Menu.submenuPopupOffsetY` to adjust the exact location of popup.
      Returns:
        a `Point` in the coordinate space of the menu which should be used as the origin of the `JMenu`'s popup menu
      Since:
        1.3

    - #### getDelay

          public int getDelay()

      Returns the suggested delay, in milliseconds, before submenus are popped up or down. Each look and feel (L&F) may determine its own policy for observing the `delay` property. In most cases, the delay is not observed for top level menus or while dragging. The default for `delay` is 0. This method is a property of the look and feel code and is used to manage the idiosyncrasies of the various UI implementations.
      Returns:
        the `delay` property

    - #### setDelay

          public void setDelay(int d)

      Sets the suggested delay before the menu's `PopupMenu` is popped up or down. Each look and feel (L&F) may determine it's own policy for observing the delay property. In most cases, the delay is not observed for top level menus or while dragging. This method is a property of the look and feel code and is used to manage the idiosyncrasies of the various UI implementations.
      Parameters:
        `d` - the number of milliseconds to delay
      Throws:
        `IllegalArgumentException` - if `d` is less than 0

    - #### setMenuLocation

          public void setMenuLocation(int x,
                                      int y)

      Sets the location of the popup component.
      Parameters:
        `x` - the x coordinate of the popup's new position
        `y` - the y coordinate of the popup's new position

    - #### add

          public JMenuItem add(JMenuItem menuItem)

      Appends a menu item to the end of this menu. Returns the menu item added.
      Parameters:
        `menuItem` - the `JMenuitem` to be added
      Returns:
        the `JMenuItem` added

    - #### add

          public Component add(Component c)

      Appends a component to the end of this menu. Returns the component added.
      Overrides:
        `add` in class `Container`
      Parameters:
        `c` - the `Component` to add
      Returns:
        the `Component` added
      See Also:
        `Container.addImpl(java.awt.Component, java.lang.Object, int)`, `Container.invalidate()`, `Container.validate()`, `JComponent.revalidate()`

    - #### add

          public Component add(Component c,
                               int index)

      Adds the specified component to this container at the given position. If `index` equals -1, the component will be appended to the end.
      Overrides:
        `add` in class `Container`
      Parameters:
        `c` - the `Component` to add
        `index` - the position at which to insert the component
      Returns:
        the `Component` added
      See Also:
        `remove(javax.swing.JMenuItem)`, `Container.add(Component, int)`

    - #### add

          public JMenuItem add(String s)

      Creates a new menu item with the specified text and appends it to the end of this menu.
      Parameters:
        `s` - the string for the menu item to be added

    - #### add

          public JMenuItem add(Action a)

      Creates a new menu item attached to the specified `Action` object and appends it to the end of this menu.
      Parameters:
        `a` - the `Action` for the menu item to be added
      See Also:
        `Action`

    - #### createActionComponent

          protected JMenuItem createActionComponent(Action a)

      Factory method which creates the `JMenuItem` for `Action`s added to the `JMenu`.
      Parameters:
        `a` - the `Action` for the menu item to be added
      Returns:
        the new menu item
      Since:
        1.3
      See Also:
        `Action`

    - #### createActionChangeListener

          protected PropertyChangeListener createActionChangeListener(JMenuItem b)

      Returns a properly configured `PropertyChangeListener` which updates the control as changes to the `Action` occur.

    - #### addSeparator

          public void addSeparator()

      Appends a new separator to the end of the menu.

    - #### insert

          public void insert(String s,
                             int pos)

      Inserts a new menu item with the specified text at a given position.
      Parameters:
        `s` - the text for the menu item to add
        `pos` - an integer specifying the position at which to add the new menu item
      Throws:
        `IllegalArgumentException` - when the value of `pos` < 0

    - #### insert

          public JMenuItem insert(JMenuItem mi,
                                  int pos)

      Inserts the specified `JMenuitem` at a given position.
      Parameters:
        `mi` - the `JMenuitem` to add
        `pos` - an integer specifying the position at which to add the new `JMenuitem`
      Returns:
        the new menu item
      Throws:
        `IllegalArgumentException` - if the value of `pos` < 0

    - #### insert

          public JMenuItem insert(Action a,
                                  int pos)

      Inserts a new menu item attached to the specified `Action` object at a given position.
      Parameters:
        `a` - the `Action` object for the menu item to add
        `pos` - an integer specifying the position at which to add the new menu item
      Throws:
        `IllegalArgumentException` - if the value of `pos` < 0

    - #### insertSeparator

          public void insertSeparator(int index)

      Inserts a separator at the specified position.
      Parameters:
        `index` - an integer specifying the position at which to insert the menu separator
      Throws:
        `IllegalArgumentException` - if the value of `index` < 0

    - #### getItem

          public JMenuItem getItem(int pos)

      Returns the `JMenuItem` at the specified position. If the component at `pos` is not a menu item, `null` is returned. This method is included for AWT compatibility.
      Parameters:
        `pos` - an integer specifying the position
      Returns:
        the menu item at the specified position; or `null` if the item as the specified position is not a menu item
      Throws:
        `IllegalArgumentException` - if the value of `pos` < 0

    - #### getItemCount

          public int getItemCount()

      Returns the number of items on the menu, including separators. This method is included for AWT compatibility.
      Returns:
        an integer equal to the number of items on the menu
      See Also:
        `getMenuComponentCount()`

    - #### isTearOff

          public boolean isTearOff()

      Returns true if the menu can be torn off. This method is not yet implemented.
      Returns:
        true if the menu can be torn off, else false
      Throws:
        `Error` - if invoked -- this method is not yet implemented

    - #### remove

          public void remove(JMenuItem item)

      Removes the specified menu item from this menu. If there is no popup menu, this method will have no effect.
      Parameters:
        `item` - the `JMenuItem` to be removed from the menu

    - #### remove

          public void remove(int pos)

      Removes the menu item at the specified index from this menu.
      Overrides:
        `remove` in class `Container`
      Parameters:
        `pos` - the position of the item to be removed
      Throws:
        `IllegalArgumentException` - if the value of `pos` < 0, or if `pos` is greater than the number of menu items
      See Also:
        `Container.add(java.awt.Component)`, `Container.invalidate()`, `Container.validate()`, `Container.getComponentCount()`

    - #### remove

          public void remove(Component c)

      Removes the component `c` from this menu.
      Overrides:
        `remove` in class `Container`
      Parameters:
        `c` - the component to be removed
      See Also:
        `Container.add(java.awt.Component)`, `Container.invalidate()`, `Container.validate()`, `Container.remove(int)`

    - #### removeAll

          public void removeAll()

      Removes all menu items from this menu.
      Overrides:
        `removeAll` in class `Container`
      See Also:
        `Container.add(java.awt.Component)`, `Container.remove(int)`, `Container.invalidate()`

    - #### getMenuComponentCount

          public int getMenuComponentCount()

      Returns the number of components on the menu.
      Returns:
        an integer containing the number of components on the menu

    - #### getMenuComponent

          public Component getMenuComponent(int n)

      Returns the component at position `n`.
      Parameters:
        `n` - the position of the component to be returned
      Returns:
        the component requested, or `null` if there is no popup menu

    - #### getMenuComponents

          public Component[] getMenuComponents()

      Returns an array of `Component`s of the menu's subcomponents. Note that this returns all `Component`s in the popup menu, including separators.
      Returns:
        an array of `Component`s or an empty array if there is no popup menu

    - #### isTopLevelMenu

          public boolean isTopLevelMenu()

      Returns true if the menu is a 'top-level menu', that is, if it is the direct child of a menubar.
      Returns:
        true if the menu is activated from the menu bar; false if the menu is activated from a menu item on another menu

    - #### isMenuComponent

          public boolean isMenuComponent(Component c)

      Returns true if the specified component exists in the submenu hierarchy.
      Parameters:
        `c` - the `Component` to be tested
      Returns:
        true if the `Component` exists, false otherwise

    - #### getPopupMenu

          public JPopupMenu getPopupMenu()

      Returns the popupmenu associated with this menu. If there is no popupmenu, it will create one.

    - #### addMenuListener

          public void addMenuListener(MenuListener l)

      Adds a listener for menu events.
      Parameters:
        `l` - the listener to be added

    - #### removeMenuListener

          public void removeMenuListener(MenuListener l)

      Removes a listener for menu events.
      Parameters:
        `l` - the listener to be removed

    - #### getMenuListeners

          public MenuListener[] getMenuListeners()

      Returns an array of all the `MenuListener`s added to this JMenu with addMenuListener().
      Returns:
        all of the `MenuListener`s added or an empty array if no listeners have been added
      Since:
        1.4

    - #### fireMenuSelected

          protected void fireMenuSelected()

      Notifies all listeners that have registered interest for notification on this event type. The event instance is created lazily.
      Throws:
        `Error` - if there is a `null` listener
      See Also:
        `EventListenerList`

    - #### fireMenuDeselected

          protected void fireMenuDeselected()

      Notifies all listeners that have registered interest for notification on this event type. The event instance is created lazily.
      Throws:
        `Error` - if there is a `null` listener
      See Also:
        `EventListenerList`

    - #### fireMenuCanceled

          protected void fireMenuCanceled()

      Notifies all listeners that have registered interest for notification on this event type. The event instance is created lazily.
      Throws:
        `Error` - if there is a `null` listener
      See Also:
        `EventListenerList`

    - #### createWinListener

          protected JMenu.WinListener createWinListener(JPopupMenu p)

      Creates a window-closing listener for the popup.
      Parameters:
        `p` - the `JPopupMenu`
      Returns:
        the new window-closing listener
      See Also:
        `JMenu.WinListener`

    - #### menuSelectionChanged

          public void menuSelectionChanged(boolean isIncluded)

      Messaged when the menubar selection changes to activate or deactivate this menu. Overrides `JMenuItem.menuSelectionChanged`.
      Specified by:
        `menuSelectionChanged` in interface `MenuElement`
      Overrides:
        `menuSelectionChanged` in class `JMenuItem`
      Parameters:
        `isIncluded` - true if this menu is active, false if it is not
      See Also:
        `MenuSelectionManager.setSelectedPath(MenuElement[])`

    - #### getSubElements

          public MenuElement[] getSubElements()

      Returns an array of `MenuElement`s containing the submenu for this menu component. If popup menu is `null` returns an empty array. This method is required to conform to the `MenuElement` interface. Note that since `JSeparator`s do not conform to the `MenuElement` interface, this array will only contain `JMenuItem`s.
      Specified by:
        `getSubElements` in interface `MenuElement`
      Overrides:
        `getSubElements` in class `JMenuItem`
      Returns:
        an array of `MenuElement` objects

    - #### getComponent

          public Component getComponent()

      Returns the `java.awt.Component` used to paint this `MenuElement`. The returned component is used to convert events and detect if an event is inside a menu component.
      Specified by:
        `getComponent` in interface `MenuElement`
      Overrides:
        `getComponent` in class `JMenuItem`
      Returns:
        the `Component` that paints this menu item

    - #### applyComponentOrientation

          public void applyComponentOrientation(ComponentOrientation o)

      Sets the `ComponentOrientation` property of this menu and all components contained within it. This includes all components returned by `getMenuComponents`.
      Overrides:
        `applyComponentOrientation` in class `Container`
      Parameters:
        `o` - the new component orientation of this menu and the components contained within it.
      Throws:
        `NullPointerException` - if `orientation` is null.
      Since:
        1.4
      See Also:
        `Component.setComponentOrientation(java.awt.ComponentOrientation)`, `Component.getComponentOrientation()`

    - #### setComponentOrientation

          public void setComponentOrientation(ComponentOrientation o)

      Description copied from class: `Component`
      Sets the language-sensitive orientation that is to be used to order the elements or text within this component. Language-sensitive `LayoutManager` and `Component` subclasses will use this property to determine how to lay out and draw components.

      At construction time, a component's orientation is set to `ComponentOrientation.UNKNOWN`, indicating that it has not been specified explicitly. The UNKNOWN orientation behaves the same as `ComponentOrientation.LEFT_TO_RIGHT`.

      To set the orientation of a single component, use this method. To set the orientation of an entire component hierarchy, use `applyComponentOrientation`.

      This method changes layout-related information, and therefore, invalidates the component hierarchy.

      Overrides:
        `setComponentOrientation` in class `Component`
      See Also:
        `ComponentOrientation`, `Component.invalidate()`

    - #### setAccelerator

          public void setAccelerator(KeyStroke keyStroke)

      `setAccelerator` is not defined for `JMenu`. Use `setMnemonic` instead.
      Overrides:
        `setAccelerator` in class `JMenuItem`
      Parameters:
        `keyStroke` - the keystroke combination which will invoke the `JMenuItem`'s actionlisteners without navigating the menu hierarchy
      Throws:
        `Error` - if invoked -- this method is not defined for JMenu. Use `setMnemonic` instead

    - #### processKeyEvent

          protected void processKeyEvent(KeyEvent evt)

      Processes key stroke events such as mnemonics and accelerators.
      Overrides:
        `processKeyEvent` in class `JComponent`
      Parameters:
        `evt` - the key event to be processed
      See Also:
        `KeyEvent`, `KeyListener`, `KeyboardFocusManager`, `DefaultKeyboardFocusManager`, `Component.processEvent(java.awt.AWTEvent)`, `Component.dispatchEvent(java.awt.AWTEvent)`, `Component.addKeyListener(java.awt.event.KeyListener)`, `Component.enableEvents(long)`, `Component.isShowing()`

    - #### doClick

          public void doClick(int pressTime)

      Programmatically performs a "click". This overrides the method `AbstractButton.doClick` in order to make the menu pop up.
      Overrides:
        `doClick` in class `AbstractButton`
      Parameters:
        `pressTime` - indicates the number of milliseconds the button was pressed for

    - #### paramString

          protected String paramString()

      Returns a string representation of this `JMenu`. 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`.
      Overrides:
        `paramString` in class `JMenuItem`
      Returns:
        a string representation of this JMenu.

    - #### getAccessibleContext

          public AccessibleContext getAccessibleContext()

      Gets the AccessibleContext associated with this JMenu. For JMenus, the AccessibleContext takes the form of an AccessibleJMenu. A new AccessibleJMenu instance is created if necessary.
      Specified by:
        `getAccessibleContext` in interface `Accessible`
      Overrides:
        `getAccessibleContext` in class `JMenuItem`
      Returns:
        an AccessibleJMenu that serves as the AccessibleContext of this JMenu

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