Java javax.swing Class JMenuItem（JDK8）

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Java™ Platform
Standard Ed. 8

All Classes

Summary:
Nested |
Field |
Constr |
Method

Detail:
Field |
Constr |
Method

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

All Implemented Interfaces:

ImageObserver, ItemSelectable, MenuContainer, Serializable, Accessible, MenuElement, SwingConstants

Direct Known Subclasses:

JCheckBoxMenuItem, JMenu, JRadioButtonMenuItem
```
public class JMenuItem
extends AbstractButton
implements Accessible, MenuElement
```
An implementation of an item in a menu. A menu item is essentially a button sitting in a list. When the user selects the "button", the action associated with the menu item is performed. A JMenuItem contained in a JPopupMenu performs exactly that function.
Menu items can be configured, and to some degree controlled, by Actions. Using an Action with a menu item has many benefits beyond directly configuring a menu item. 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 further documentation and for examples, see How to Use Menus 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:

JPopupMenu, JMenu, JCheckBoxMenuItem, JRadioButtonMenuItem

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`protected class`	`JMenuItem.AccessibleJMenuItem` This class implements accessibility support for the `JMenuItem` class.

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 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
`JMenuItem()` Creates a `JMenuItem` with no set text or icon.
`JMenuItem(Action a)` Creates a menu item whose properties are taken from the specified `Action`.
`JMenuItem(Icon icon)` Creates a `JMenuItem` with the specified icon.
`JMenuItem(String text)` Creates a `JMenuItem` with the specified text.
`JMenuItem(String text, Icon icon)` Creates a `JMenuItem` with the specified text and icon.
`JMenuItem(String text, int mnemonic)` Creates a `JMenuItem` with the specified text and keyboard mnemonic.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`protected void`	`actionPropertyChanged(Action action, String propertyName)` Updates the button's state in response to property changes in the associated action.
`void`	`addMenuDragMouseListener(MenuDragMouseListener l)` Adds a `MenuDragMouseListener` to the menu item.
`void`	`addMenuKeyListener(MenuKeyListener l)` Adds a `MenuKeyListener` to the menu item.
`protected void`	`configurePropertiesFromAction(Action a)` Sets the properties on this button to match those in the specified `Action`.
`protected void`	`fireMenuDragMouseDragged(MenuDragMouseEvent event)` Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireMenuDragMouseEntered(MenuDragMouseEvent event)` Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireMenuDragMouseExited(MenuDragMouseEvent event)` Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireMenuDragMouseReleased(MenuDragMouseEvent event)` Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireMenuKeyPressed(MenuKeyEvent event)` Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireMenuKeyReleased(MenuKeyEvent event)` Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireMenuKeyTyped(MenuKeyEvent event)` Notifies all listeners that have registered interest for notification on this event type.
`KeyStroke`	`getAccelerator()` Returns the `KeyStroke` which serves as an accelerator for the menu item.
`AccessibleContext`	`getAccessibleContext()` Returns the `AccessibleContext` associated with this `JMenuItem`.
`Component`	`getComponent()` Returns the `java.awt.Component` used to paint this object.
`MenuDragMouseListener[]`	`getMenuDragMouseListeners()` Returns an array of all the `MenuDragMouseListener`s added to this JMenuItem with addMenuDragMouseListener().
`MenuKeyListener[]`	`getMenuKeyListeners()` Returns an array of all the `MenuKeyListener`s added to this JMenuItem with addMenuKeyListener().
`MenuElement[]`	`getSubElements()` This method returns an array containing the sub-menu components for this menu component.
`String`	`getUIClassID()` Returns the suffix used to construct the name of the L&F class used to render this component.
`protected void`	`init(String text, Icon icon)` Initializes the menu item with the specified text and icon.
`boolean`	`isArmed()` Returns whether the menu item is "armed".
`void`	`menuSelectionChanged(boolean isIncluded)` Called by the `MenuSelectionManager` when the `MenuElement` is selected or unselected.
`protected String`	`paramString()` Returns a string representation of this `JMenuItem`.
`void`	`processKeyEvent(KeyEvent e, MenuElement[] path, MenuSelectionManager manager)` Processes a key event forwarded from the `MenuSelectionManager` and changes the menu selection, if necessary, by using `MenuSelectionManager`'s API.
`void`	`processMenuDragMouseEvent(MenuDragMouseEvent e)` Handles mouse drag in a menu.
`void`	`processMenuKeyEvent(MenuKeyEvent e)` Handles a keystroke in a menu.
`void`	`processMouseEvent(MouseEvent e, MenuElement[] path, MenuSelectionManager manager)` Processes a mouse event forwarded from the `MenuSelectionManager` and changes the menu selection, if necessary, by using the `MenuSelectionManager`'s API.
`void`	`removeMenuDragMouseListener(MenuDragMouseListener l)` Removes a `MenuDragMouseListener` from the menu item.
`void`	`removeMenuKeyListener(MenuKeyListener l)` Removes a `MenuKeyListener` from the menu item.
`void`	`setAccelerator(KeyStroke keyStroke)` Sets the key combination which invokes the menu item's action listeners without navigating the menu hierarchy.
`void`	`setArmed(boolean b)` Identifies the menu item as "armed".
`void`	`setEnabled(boolean b)` Enables or disables the menu item.
`void`	`setModel(ButtonModel newModel)` Sets the model that this button represents.
`void`	`setUI(MenuItemUI ui)` Sets the look and feel object that renders this component.
`void`	`updateUI()` Resets the UI property with a value from the current look and feel.

Methods inherited from class javax.swing.AbstractButton
addActionListener, addChangeListener, addImpl, addItemListener, checkHorizontalKey, checkVerticalKey, createActionListener, createActionPropertyChangeListener, createChangeListener, createItemListener, doClick, 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, isSelected, 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, setSelected, 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, processKeyEvent, 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, add, add, addContainerListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, 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, remove, remove, removeAll, 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, setComponentOrientation, 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

- Constructor Detail
  - JMenuItem
```
public JMenuItem()
```
    Creates a JMenuItem with no set text or icon.
  - JMenuItem
```
public JMenuItem(Icon icon)
```
    Creates a JMenuItem with the specified icon.
    
    Parameters:
    
    icon - the icon of the JMenuItem
  - JMenuItem
```
public JMenuItem(String text)
```
    Creates a JMenuItem with the specified text.
    
    Parameters:
    
    text - the text of the JMenuItem
  - JMenuItem
```
public JMenuItem(Action a)
```
    Creates a menu item whose properties are taken from the specified Action.
    
    Parameters:
    
    a - the action of the JMenuItem
    
    Since:
    
    1.3
  - JMenuItem
```
public JMenuItem(String text,
                 Icon icon)
```
    Creates a JMenuItem with the specified text and icon.
    
    Parameters:
    
    text - the text of the JMenuItem
    
    icon - the icon of the JMenuItem
  - JMenuItem
```
public JMenuItem(String text,
                 int mnemonic)
```
    Creates a JMenuItem with the specified text and keyboard mnemonic.
    
    Parameters:
    
    text - the text of the JMenuItem
    
    mnemonic - the keyboard mnemonic for the JMenuItem
- Method Detail
  - setModel
```
public void setModel(ButtonModel newModel)
```
    Sets the model that this button represents.
    
    Overrides:
    
    setModel in class AbstractButton
    
    Parameters:
    
    newModel - the new ButtonModel
    
    See Also:
    
    AbstractButton.getModel()
  - init
```
protected void init(String text,
                    Icon icon)
```
    Initializes the menu item with the specified text and icon.
    
    Overrides:
    
    init in class AbstractButton
    
    Parameters:
    
    text - the text of the JMenuItem
    
    icon - the icon of the JMenuItem
  - setUI
```
public void setUI(MenuItemUI ui)
```
    Sets the look and feel object that renders this component.
    
    Parameters:
    
    ui - the JMenuItemUI L&F object
    
    See Also:
    
    UIDefaults.getUI(javax.swing.JComponent)
  - updateUI
```
public void updateUI()
```
    Resets the UI property with a value from the current look and feel.
    
    Overrides:
    
    updateUI in class AbstractButton
    
    See Also:
    
    JComponent.updateUI()
  - getUIClassID
```
public String getUIClassID()
```
    Returns the suffix used to construct the name of the L&F class used to render this component.
    
    Overrides:
    
    getUIClassID in class JComponent
    
    Returns:
    
    the string "MenuItemUI"
    
    See Also:
    
    JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)
  - setArmed
```
public void setArmed(boolean b)
```
    Identifies the menu item as "armed". If the mouse button is released while it is over this item, the menu's action event will fire. If the mouse button is released elsewhere, the event will not fire and the menu item will be disarmed.
    
    Parameters:
    
    b - true to arm the menu item so it can be selected
  - isArmed
```
public boolean isArmed()
```
    Returns whether the menu item is "armed".
    
    Returns:
    
    true if the menu item is armed, and it can be selected
    
    See Also:
    
    setArmed(boolean)
  - setEnabled
```
public void setEnabled(boolean b)
```
    Enables or disables the menu item.
    
    Overrides:
    
    setEnabled in class AbstractButton
    
    Parameters:
    
    b - true to enable the item
    
    See Also:
    
    Component.isEnabled(), Component.isLightweight()
  - setAccelerator
```
public void setAccelerator(KeyStroke keyStroke)
```
    Sets the key combination which invokes the menu item's action listeners without navigating the menu hierarchy. It is the UI's responsibility to install the correct action. Note that when the keyboard accelerator is typed, it will work whether or not the menu is currently displayed.
    
    Parameters:
    
    keyStroke - the KeyStroke which will serve as an accelerator
  - getAccelerator
```
public KeyStroke getAccelerator()
```
    Returns the KeyStroke which serves as an accelerator for the menu item.
    
    Returns:
    
    a KeyStroke object identifying the accelerator key
  - configurePropertiesFromAction
```
protected void configurePropertiesFromAction(Action a)
```
    Sets the properties on this button to match those in the specified Action. Refer to Swing Components Supporting Action for more details as to which properties this sets.
    
    Overrides:
    
    configurePropertiesFromAction in class AbstractButton
    
    Parameters:
    
    a - the Action from which to get the properties, or null
    
    Since:
    
    1.3
    
    See Also:
    
    Action, AbstractButton.setAction(javax.swing.Action)
  - actionPropertyChanged
```
protected void actionPropertyChanged(Action action,
                                     String propertyName)
```
    Updates the button's state in response to property changes in the associated action. This method is invoked from the PropertyChangeListener returned from createActionPropertyChangeListener. Subclasses do not normally need to invoke this. Subclasses that support additional Action properties should override this and configurePropertiesFromAction.
    Refer to the table at Swing Components Supporting Action for a list of the properties this method sets.
    
    Overrides:
    
    actionPropertyChanged in class AbstractButton
    
    Parameters:
    
    action - the Action associated with this button
    
    propertyName - the name of the property that changed
    
    Since:
    
    1.6
    
    See Also:
    
    Action, AbstractButton.configurePropertiesFromAction(javax.swing.Action)
  - processMouseEvent
```
public void processMouseEvent(MouseEvent e,
                              MenuElement[] path,
                              MenuSelectionManager manager)
```
    Processes a mouse event forwarded from the MenuSelectionManager and changes the menu selection, if necessary, by using the MenuSelectionManager's API.
    Note: you do not have to forward the event to sub-components. This is done automatically by the MenuSelectionManager.
    
    Specified by:
    
    processMouseEvent in interface MenuElement
    
    Parameters:
    
    e - a MouseEvent
    
    path - the MenuElement path array
    
    manager - the MenuSelectionManager
  - processKeyEvent
```
public void processKeyEvent(KeyEvent e,
                            MenuElement[] path,
                            MenuSelectionManager manager)
```
    Processes a key event forwarded from the MenuSelectionManager and changes the menu selection, if necessary, by using MenuSelectionManager's API.
    Note: you do not have to forward the event to sub-components. This is done automatically by the MenuSelectionManager.
    
    Specified by:
    
    processKeyEvent in interface MenuElement
    
    Parameters:
    
    e - a KeyEvent
    
    path - the MenuElement path array
    
    manager - the MenuSelectionManager
  - processMenuDragMouseEvent
```
public void processMenuDragMouseEvent(MenuDragMouseEvent e)
```
    Handles mouse drag in a menu.
    
    Parameters:
    
    e - a MenuDragMouseEvent object
  - processMenuKeyEvent
```
public void processMenuKeyEvent(MenuKeyEvent e)
```
    Handles a keystroke in a menu.
    
    Parameters:
    
    e - a MenuKeyEvent object
  - fireMenuDragMouseEntered
```
protected void fireMenuDragMouseEntered(MenuDragMouseEvent event)
```
    Notifies all listeners that have registered interest for notification on this event type.
    
    Parameters:
    
    event - a MenuMouseDragEvent
    
    See Also:
    
    EventListenerList
  - fireMenuDragMouseExited
```
protected void fireMenuDragMouseExited(MenuDragMouseEvent event)
```
    Notifies all listeners that have registered interest for notification on this event type.
    
    Parameters:
    
    event - a MenuDragMouseEvent
    
    See Also:
    
    EventListenerList
  - fireMenuDragMouseDragged
```
protected void fireMenuDragMouseDragged(MenuDragMouseEvent event)
```
    Notifies all listeners that have registered interest for notification on this event type.
    
    Parameters:
    
    event - a MenuDragMouseEvent
    
    See Also:
    
    EventListenerList
  - fireMenuDragMouseReleased
```
protected void fireMenuDragMouseReleased(MenuDragMouseEvent event)
```
    Notifies all listeners that have registered interest for notification on this event type.
    
    Parameters:
    
    event - a MenuDragMouseEvent
    
    See Also:
    
    EventListenerList
  - fireMenuKeyPressed
```
protected void fireMenuKeyPressed(MenuKeyEvent event)
```
    Notifies all listeners that have registered interest for notification on this event type.
    
    Parameters:
    
    event - a MenuKeyEvent
    
    See Also:
    
    EventListenerList
  - fireMenuKeyReleased
```
protected void fireMenuKeyReleased(MenuKeyEvent event)
```
    Notifies all listeners that have registered interest for notification on this event type.
    
    Parameters:
    
    event - a MenuKeyEvent
    
    See Also:
    
    EventListenerList
  - fireMenuKeyTyped
```
protected void fireMenuKeyTyped(MenuKeyEvent event)
```
    Notifies all listeners that have registered interest for notification on this event type.
    
    Parameters:
    
    event - a MenuKeyEvent
    
    See Also:
    
    EventListenerList
  - menuSelectionChanged
```
public void menuSelectionChanged(boolean isIncluded)
```
    Called by the MenuSelectionManager when the MenuElement is selected or unselected.
    
    Specified by:
    
    menuSelectionChanged in interface MenuElement
    
    Parameters:
    
    isIncluded - true if this menu item is on the part of the menu path that changed, false if this menu is part of the a menu path that changed, but this particular part of that path is still the same
    
    See Also:
    
    MenuSelectionManager.setSelectedPath(MenuElement[])
  - getSubElements
```
public MenuElement[] getSubElements()
```
    This method returns an array containing the sub-menu components for this menu component.
    
    Specified by:
    
    getSubElements in interface MenuElement
    
    Returns:
    
    an array of MenuElements
  - getComponent
```
public Component getComponent()
```
    Returns the java.awt.Component used to paint this object. The returned component will be used to convert events and detect if an event is inside a menu component.
    
    Specified by:
    
    getComponent in interface MenuElement
    
    Returns:
    
    the Component that paints this menu item
  - addMenuDragMouseListener
```
public void addMenuDragMouseListener(MenuDragMouseListener l)
```
    Adds a MenuDragMouseListener to the menu item.
    
    Parameters:
    
    l - the MenuDragMouseListener to be added
  - removeMenuDragMouseListener
```
public void removeMenuDragMouseListener(MenuDragMouseListener l)
```
    Removes a MenuDragMouseListener from the menu item.
    
    Parameters:
    
    l - the MenuDragMouseListener to be removed
  - getMenuDragMouseListeners
```
public MenuDragMouseListener[] getMenuDragMouseListeners()
```
    Returns an array of all the MenuDragMouseListeners added to this JMenuItem with addMenuDragMouseListener().
    
    Returns:
    
    all of the MenuDragMouseListeners added or an empty array if no listeners have been added
    
    Since:
    
    1.4
  - addMenuKeyListener
```
public void addMenuKeyListener(MenuKeyListener l)
```
    Adds a MenuKeyListener to the menu item.
    
    Parameters:
    
    l - the MenuKeyListener to be added
  - removeMenuKeyListener
```
public void removeMenuKeyListener(MenuKeyListener l)
```
    Removes a MenuKeyListener from the menu item.
    
    Parameters:
    
    l - the MenuKeyListener to be removed
  - getMenuKeyListeners
```
public MenuKeyListener[] getMenuKeyListeners()
```
    Returns an array of all the MenuKeyListeners added to this JMenuItem with addMenuKeyListener().
    
    Returns:
    
    all of the MenuKeyListeners added or an empty array if no listeners have been added
    
    Since:
    
    1.4
  - paramString
```
protected String paramString()
```
    Returns a string representation of this JMenuItem. 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 AbstractButton
    
    Returns:
    
    a string representation of this JMenuItem
  - getAccessibleContext
```
public AccessibleContext getAccessibleContext()
```
    Returns the AccessibleContext associated with this JMenuItem. For JMenuItems, the AccessibleContext takes the form of an AccessibleJMenuItem. A new AccessibleJMenuItme instance is created if necessary.
    
    Specified by:
    
    getAccessibleContext in interface Accessible
    
    Overrides:
    
    getAccessibleContext in class Component
    
    Returns:
    
    an AccessibleJMenuItem that serves as the AccessibleContext of this JMenuItem

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Java™ Platform
Standard Ed. 8

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Java javax.swing Class JMenuItem（JDK8）

Class JMenuItem

Nested Class Summary

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

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

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

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

Field Summary

Fields inherited from class javax.swing.AbstractButton

Fields inherited from class javax.swing.JComponent

Fields inherited from class java.awt.Component

Fields inherited from interface javax.swing.SwingConstants

Fields inherited from interface java.awt.image.ImageObserver

Constructor Summary

Method Summary

Methods inherited from class javax.swing.AbstractButton

Methods inherited from class javax.swing.JComponent

Methods inherited from class java.awt.Container

Methods inherited from class java.awt.Component

Methods inherited from class java.lang.Object

Constructor Detail

JMenuItem

JMenuItem

JMenuItem

JMenuItem

JMenuItem

JMenuItem

Method Detail

setModel

init

setUI

updateUI

getUIClassID

setArmed

isArmed

setEnabled

setAccelerator

getAccelerator

configurePropertiesFromAction

actionPropertyChanged

processMouseEvent

processKeyEvent

processMenuDragMouseEvent

processMenuKeyEvent

fireMenuDragMouseEntered

fireMenuDragMouseExited

fireMenuDragMouseDragged

fireMenuDragMouseReleased

fireMenuKeyPressed

fireMenuKeyReleased

fireMenuKeyTyped

menuSelectionChanged

getSubElements

getComponent

addMenuDragMouseListener

removeMenuDragMouseListener

getMenuDragMouseListeners

addMenuKeyListener

removeMenuKeyListener

getMenuKeyListeners

paramString

getAccessibleContext