# 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`

@JavaBean(description="A popup window containing menu items displayed in a menu bar.") 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`.

Since:
  1.2
See Also:
  - `JMenuItem`
  - `JSeparator`
  - `JMenuBar`
  - `JPopupMenu`

## Nested Class Summary

Nested Classes
Modifier and Type
Class
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 declared in class JMenuItem

`JMenuItem.AccessibleJMenuItem`

### Nested classes/interfaces declared in class AbstractButton

`AbstractButton.AccessibleAbstractButton, AbstractButton.ButtonChangeListener`

### Nested classes/interfaces declared in class JComponent

`JComponent.AccessibleJComponent`

### Nested classes/interfaces declared in class Container

`Container.AccessibleAWTContainer`

### Nested classes/interfaces declared in class Component

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

## Field Summary

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

### Fields declared in class 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 declared in class JComponent

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

### Fields declared in class Component

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

### Fields declared in interface ImageObserver

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

### Fields declared in interface SwingConstants

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

## Constructor Summary

Constructors
Constructor
Description
`JMenu()`
Constructs a new `JMenu` with no text.
`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.
`JMenu(Action a)`
Constructs a menu whose properties are taken from the `Action` supplied.

## Method Summary

Modifier and Type
Method
Description
`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(String s)`
Creates a new menu item with the specified text and appends it to the end of this menu.
`JMenuItem`
`add(Action a)`
Creates a new menu item attached to the specified `Action` object and appends it to the end of this menu.
`JMenuItem`
`add(JMenuItem menuItem)`
Appends a menu item 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.
`void`
`insert(String s, int pos)`
Inserts a new menu item with the specified text at a given position.
`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`
`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(int pos)`
Removes the menu item at the specified index from this menu.
`void`
`remove(Component c)`
Removes the component `c` 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 orientation for this menu and its associated popup menu determined by the `ComponentOrientation` argument.
`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 declared in class 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 declared in class 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 declared in class JComponent

`addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, 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 declared in class 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 declared in class 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, 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, 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, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle`

### Methods declared in class Object

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

### Methods declared in interface MenuElement

`processKeyEvent, processMouseEvent`

## Field Details

### popupListener

protected JMenu.WinListener popupListener
The window-closing listener for the popup.

See Also:
  - `JMenu.WinListener`

## Constructor Details

### 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 Details

### 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

@BeanProperty(bound=false) 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(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 `AbstractButton`
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

@BeanProperty(expert=true, hidden=true, description="When the menu is selected, its popup child is shown.") 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

@BeanProperty(bound=false, expert=true, hidden=true, description="The popup menu's visibility") 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

@BeanProperty(bound=false, expert=true, description="The delay between menu selection and making the popup menu visible") 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(Component, 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(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
Returns:
  the new `JMenuItem`

### 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
Returns:
  the new `JMenuItem`
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.

Parameters:
  `b` - a menu item for which to create a `PropertyChangeListener`
Returns:
  a `PropertyChangeListener` for `b`

### 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
Returns:
  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

@BeanProperty(bound=false) 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

@BeanProperty(bound=false) 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(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(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(Component)`
  - `Container.remove(int)`
  - `Container.invalidate()`

### getMenuComponentCount

@BeanProperty(bound=false) 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

@BeanProperty(bound=false) 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

@BeanProperty(bound=false) 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

@BeanProperty(bound=false) public JPopupMenu getPopupMenu()
Returns the popupmenu associated with this menu. If there is no popupmenu, it will create one.

Returns:
  the `JPopupMenu` associated with this menu

### 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

@BeanProperty(bound=false) 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

@BeanProperty(bound=false) 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(ComponentOrientation)`
  - `Component.getComponentOrientation()`

### setComponentOrientation

public void setComponentOrientation(ComponentOrientation o)
Sets the orientation for this menu and its associated popup menu determined by the `ComponentOrientation` argument.

Overrides:
  `setComponentOrientation` in class `Component`
Parameters:
  `o` - the new orientation for this menu and its associated popup menu.
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(AWTEvent)`
  - `Component.dispatchEvent(AWTEvent)`
  - `Component.addKeyListener(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

@BeanProperty(bound=false) 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