javax.swing

## Class JPopupMenu

- java.lang.Object
- - java.awt.Component
  - - java.awt.Container
    - - javax.swing.JComponent
      - - javax.swing.JPopupMenu

- All Implemented Interfaces:
    ImageObserver, MenuContainer, Serializable, Accessible, MenuElement
  Direct Known Subclasses:
    BasicComboPopup

      public class JPopupMenu
      extends JComponent
      implements Accessible, MenuElement

  An implementation of a popup menu -- a small window that pops up and displays a series of choices. A `JPopupMenu` is used for the menu that appears when the user selects an item on the menu bar. It is also used for "pull-right" menu that appears when the selects a menu item that activates it. Finally, a `JPopupMenu` can also be used anywhere else you want a menu to appear. For example, when the user right-clicks in a specified area.

  For information and examples of using popup menus, 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 JavaBeansTM has been added to the `java.beans` package. Please see `XMLEncoder`.

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `protected class` | `JPopupMenu.AccessibleJPopupMenu` This class implements accessibility support for the `JPopupMenu` class.
    `static class` | `JPopupMenu.Separator` A popup menu-specific separator.

    - ### 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.JComponent

      `accessibleContext, 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

      `BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT`

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

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

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `JPopupMenu()` Constructs a `JPopupMenu` without an "invoker".
    `JPopupMenu(String label)` Constructs a `JPopupMenu` with the specified title.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `JMenuItem` | `add(Action a)` Appends a new menu item to the end of the menu which dispatches the specified `Action` object.
    `JMenuItem` | `add(JMenuItem menuItem)` Appends the specified 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` | `addMenuKeyListener(MenuKeyListener l)` Adds a `MenuKeyListener` to the popup menu.
    `void` | `addPopupMenuListener(PopupMenuListener l)` Adds a `PopupMenu` listener.
    `void` | `addSeparator()` Appends a new separator at the end of the menu.
    `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 `Actions` added to the `JPopupMenu`.
    `protected void` | `firePopupMenuCanceled()` Notifies `PopupMenuListeners` that this popup menu is cancelled.
    `protected void` | `firePopupMenuWillBecomeInvisible()` Notifies `PopupMenuListener`s that this popup menu will become invisible.
    `protected void` | `firePopupMenuWillBecomeVisible()` Notifies `PopupMenuListener`s that this popup menu will become visible.
    `AccessibleContext` | `getAccessibleContext()` Gets the AccessibleContext associated with this JPopupMenu.
    `Component` | `getComponent()` Returns this `JPopupMenu` component.
    `Component` | `getComponentAtIndex(int i)` Deprecated. replaced by `Container.getComponent(int)`
    `int` | `getComponentIndex(Component c)` Returns the index of the specified component.
    `static boolean` | `getDefaultLightWeightPopupEnabled()` Gets the `defaultLightWeightPopupEnabled` property, which by default is `true`.
    `Component` | `getInvoker()` Returns the component which is the 'invoker' of this popup menu.
    `String` | `getLabel()` Returns the popup menu's label
    `Insets` | `getMargin()` Returns the margin, in pixels, between the popup menu's border and its containees.
    `MenuKeyListener[]` | `getMenuKeyListeners()` Returns an array of all the `MenuKeyListener`s added to this JPopupMenu with addMenuKeyListener().
    `PopupMenuListener[]` | `getPopupMenuListeners()` Returns an array of all the `PopupMenuListener`s added to this JMenuItem with addPopupMenuListener().
    `SingleSelectionModel` | `getSelectionModel()` Returns the model object that handles single selections.
    `MenuElement[]` | `getSubElements()` Returns an array of `MenuElement`s containing the submenu for this menu component.
    `PopupMenuUI` | `getUI()` Returns the look and feel (L&F) object that renders this component.
    `String` | `getUIClassID()` Returns the name of the L&F class that renders this component.
    `void` | `insert(Action a, int index)` Inserts a menu item for the specified `Action` object at a given position.
    `void` | `insert(Component component, int index)` Inserts the specified component into the menu at a given position.
    `boolean` | `isBorderPainted()` Checks whether the border should be painted.
    `boolean` | `isLightWeightPopupEnabled()` Gets the `lightWeightPopupEnabled` property.
    `boolean` | `isPopupTrigger(MouseEvent e)` Returns true if the `MouseEvent` is considered a popup trigger by the `JPopupMenu`'s currently installed UI.
    `boolean` | `isVisible()` Returns true if the popup menu is visible (currently being displayed).
    `void` | `menuSelectionChanged(boolean isIncluded)` Messaged when the menubar selection changes to activate or deactivate this menu.
    `void` | `pack()` Lays out the container so that it uses the minimum space needed to display its contents.
    `protected void` | `paintBorder(Graphics g)` Paints the popup menu's border if the `borderPainted` property is `true`.
    `protected String` | `paramString()` Returns a string representation of this `JPopupMenu`.
    `protected void` | `processFocusEvent(FocusEvent evt)` Processes focus events occurring on this component by dispatching them to any registered `FocusListener` objects.
    `protected void` | `processKeyEvent(KeyEvent evt)` Processes key stroke events such as mnemonics and accelerators.
    `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` | `processMouseEvent(MouseEvent event, MenuElement[] path, MenuSelectionManager manager)` This method is required to conform to the `MenuElement` interface, but it not implemented.
    `void` | `remove(int pos)` Removes the component at the specified index from this popup menu.
    `void` | `removeMenuKeyListener(MenuKeyListener l)` Removes a `MenuKeyListener` from the popup menu.
    `void` | `removePopupMenuListener(PopupMenuListener l)` Removes a `PopupMenu` listener.
    `void` | `setBorderPainted(boolean b)` Sets whether the border should be painted.
    `static void` | `setDefaultLightWeightPopupEnabled(boolean aFlag)` Sets the default value of the `lightWeightPopupEnabled` property.
    `void` | `setInvoker(Component invoker)` Sets the invoker of this popup menu -- the component in which the popup menu menu is to be displayed.
    `void` | `setLabel(String label)` Sets the popup menu's label.
    `void` | `setLightWeightPopupEnabled(boolean aFlag)` Sets the value of the `lightWeightPopupEnabled` property, which by default is `true`.
    `void` | `setLocation(int x, int y)` Sets the location of the upper left corner of the popup menu using x, y coordinates.
    `void` | `setPopupSize(Dimension d)` Sets the size of the Popup window using a `Dimension` object.
    `void` | `setPopupSize(int width, int height)` Sets the size of the Popup window to the specified width and height.
    `void` | `setSelected(Component sel)` Sets the currently selected component, This will result in a change to the selection model.
    `void` | `setSelectionModel(SingleSelectionModel model)` Sets the model object to handle single selections.
    `void` | `setUI(PopupMenuUI ui)` Sets the L&F object that renders this component.
    `void` | `setVisible(boolean b)` Sets the visibility of the popup menu.
    `void` | `show(Component invoker, int x, int y)` Displays the popup menu at the position x,y in the coordinate space of the component invoker.
    `void` | `updateUI()` Resets the UI property to a value from the current look and feel.

    - ### 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, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, unregisterKeyboardAction, update`

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

      `add, add, add, add, add, addContainerListener, addImpl, 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, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, 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, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, 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, 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

    - #### JPopupMenu

          public JPopupMenu()

      Constructs a `JPopupMenu` without an "invoker".

    - #### JPopupMenu

          public JPopupMenu(String label)

      Constructs a `JPopupMenu` with the specified title.
      Parameters:
        `label` - the string that a UI may use to display as a title for the popup menu.

  - ### Method Detail

    - #### setDefaultLightWeightPopupEnabled

          public static void setDefaultLightWeightPopupEnabled(boolean aFlag)

      Sets the default value of the `lightWeightPopupEnabled` property.
      Parameters:
        `aFlag` - `true` if popups can be lightweight, otherwise `false`
      See Also:
        `getDefaultLightWeightPopupEnabled()`, `setLightWeightPopupEnabled(boolean)`

    - #### getDefaultLightWeightPopupEnabled

          public static boolean getDefaultLightWeightPopupEnabled()

      Gets the `defaultLightWeightPopupEnabled` property, which by default is `true`.
      Returns:
        the value of the `defaultLightWeightPopupEnabled` property
      See Also:
        `setDefaultLightWeightPopupEnabled(boolean)`

    - #### getUI

          public PopupMenuUI getUI()

      Returns the look and feel (L&F) object that renders this component.
      Returns:
        the `PopupMenuUI` object that renders this component

    - #### setUI

          public void setUI(PopupMenuUI ui)

      Sets the L&F object that renders this component.
      Parameters:
        `ui` - the new `PopupMenuUI` L&F object
      See Also:
        `UIDefaults.getUI(javax.swing.JComponent)`

    - #### updateUI

          public void updateUI()

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

    - #### getUIClassID

          public String getUIClassID()

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

    - #### processFocusEvent

          protected void processFocusEvent(FocusEvent evt)

      Description copied from class: `Component`
      Processes focus events occurring on this component by dispatching them to any registered `FocusListener` objects.

      This method is not called unless focus events are enabled for this component. Focus events are enabled when one of the following occurs:

      - A `FocusListener` object is registered via `addFocusListener`.
      - Focus events are enabled via `enableEvents`.

      If focus events are enabled for a `Component`, the current `KeyboardFocusManager` determines whether or not a focus event should be dispatched to registered `FocusListener` objects. If the events are to be dispatched, the `KeyboardFocusManager` calls the `Component`'s `dispatchEvent` method, which results in a call to the `Component`'s `processFocusEvent` method.

      If focus events are enabled for a `Component`, calling the `Component`'s `dispatchEvent` method with a `FocusEvent` as the argument will result in a call to the `Component`'s `processFocusEvent` method regardless of the current `KeyboardFocusManager`.

      Note that if the event parameter is `null` the behavior is unspecified and may result in an exception.

      Overrides:
        `processFocusEvent` in class `Component`
      Parameters:
        `evt` - the focus event
      See Also:
        `FocusEvent`, `FocusListener`, `KeyboardFocusManager`, `Component.addFocusListener(java.awt.event.FocusListener)`, `Component.enableEvents(long)`, `Component.dispatchEvent(java.awt.AWTEvent)`

    - #### 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()`

    - #### getSelectionModel

          public SingleSelectionModel getSelectionModel()

      Returns the model object that handles single selections.
      Returns:
        the `selectionModel` property
      See Also:
        `SingleSelectionModel`

    - #### setSelectionModel

          public void setSelectionModel(SingleSelectionModel model)

      Sets the model object to handle single selections.
      Parameters:
        `model` - the new `SingleSelectionModel`
      See Also:
        `SingleSelectionModel`

    - #### add

          public JMenuItem add(JMenuItem menuItem)

      Appends the specified menu item to the end of this menu.
      Parameters:
        `menuItem` - the `JMenuItem` to add
      Returns:
        the `JMenuItem` added

    - #### 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)

      Appends a new menu item to the end of the menu which dispatches the specified `Action` object.
      Parameters:
        `a` - the `Action` to add to the menu
      Returns:
        the new menu item
      See Also:
        `Action`

    - #### createActionComponent

          protected JMenuItem createActionComponent(Action a)

      Factory method which creates the `JMenuItem` for `Actions` added to the `JPopupMenu`.
      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.

    - #### remove

          public void remove(int pos)

      Removes the component at the specified index from this popup 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 the value of `pos` is greater than the number of items
      See Also:
        `Container.add(java.awt.Component)`, `Container.validate()`, `Container.getComponentCount()`

    - #### setLightWeightPopupEnabled

          public void setLightWeightPopupEnabled(boolean aFlag)

      Sets the value of the `lightWeightPopupEnabled` property, which by default is `true`. By default, when a look and feel displays a popup, it can choose to use a lightweight (all-Java) popup. Lightweight popup windows are more efficient than heavyweight (native peer) windows, but lightweight and heavyweight components do not mix well in a GUI. If your application mixes lightweight and heavyweight components, you should disable lightweight popups. Some look and feels might always use heavyweight popups, no matter what the value of this property.
      Parameters:
        `aFlag` - `false` to disable lightweight popups
      See Also:
        `isLightWeightPopupEnabled()`

    - #### isLightWeightPopupEnabled

          public boolean isLightWeightPopupEnabled()

      Gets the `lightWeightPopupEnabled` property.
      Returns:
        the value of the `lightWeightPopupEnabled` property
      See Also:
        `setLightWeightPopupEnabled(boolean)`

    - #### getLabel

          public String getLabel()

      Returns the popup menu's label
      Returns:
        a string containing the popup menu's label
      See Also:
        `setLabel(java.lang.String)`

    - #### setLabel

          public void setLabel(String label)

      Sets the popup menu's label. Different look and feels may choose to display or not display this.
      Parameters:
        `label` - a string specifying the label for the popup menu
      See Also:
        `setLabel(java.lang.String)`

    - #### addSeparator

          public void addSeparator()

      Appends a new separator at the end of the menu.

    - #### insert

          public void insert(Action a,
                    int index)

      Inserts a menu item for the specified `Action` object at a given position.
      Parameters:
        `a` - the `Action` object to insert
        `index` - specifies the position at which to insert the `Action`, where 0 is the first
      Throws:
        `IllegalArgumentException` - if `index` < 0
      See Also:
        `Action`

    - #### insert

          public void insert(Component component,
                    int index)

      Inserts the specified component into the menu at a given position.
      Parameters:
        `component` - the `Component` to insert
        `index` - specifies the position at which to insert the component, where 0 is the first
      Throws:
        `IllegalArgumentException` - if `index` < 0

    - #### addPopupMenuListener

          public void addPopupMenuListener(PopupMenuListener l)

      Adds a `PopupMenu` listener.
      Parameters:
        `l` - the `PopupMenuListener` to add

    - #### removePopupMenuListener

          public void removePopupMenuListener(PopupMenuListener l)

      Removes a `PopupMenu` listener.
      Parameters:
        `l` - the `PopupMenuListener` to remove

    - #### getPopupMenuListeners

          public PopupMenuListener[] getPopupMenuListeners()

      Returns an array of all the `PopupMenuListener`s added to this JMenuItem with addPopupMenuListener().
      Returns:
        all of the `PopupMenuListener`s 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 popup menu.
      Parameters:
        `l` - the `MenuKeyListener` to be added
      Since:
        1.5

    - #### removeMenuKeyListener

          public void removeMenuKeyListener(MenuKeyListener l)

      Removes a `MenuKeyListener` from the popup menu.
      Parameters:
        `l` - the `MenuKeyListener` to be removed
      Since:
        1.5

    - #### getMenuKeyListeners

          public MenuKeyListener[] getMenuKeyListeners()

      Returns an array of all the `MenuKeyListener`s added to this JPopupMenu with addMenuKeyListener().
      Returns:
        all of the `MenuKeyListener`s added or an empty array if no listeners have been added
      Since:
        1.5

    - #### firePopupMenuWillBecomeVisible

          protected void firePopupMenuWillBecomeVisible()

      Notifies `PopupMenuListener`s that this popup menu will become visible.

    - #### firePopupMenuWillBecomeInvisible

          protected void firePopupMenuWillBecomeInvisible()

      Notifies `PopupMenuListener`s that this popup menu will become invisible.

    - #### firePopupMenuCanceled

          protected void firePopupMenuCanceled()

      Notifies `PopupMenuListeners` that this popup menu is cancelled.

    - #### pack

          public void pack()

      Lays out the container so that it uses the minimum space needed to display its contents.

    - #### setVisible

          public void setVisible(boolean b)

      Sets the visibility of the popup menu.
      Overrides:
        `setVisible` in class `JComponent`
      Parameters:
        `b` - true to make the popup visible, or false to hide it
      See Also:
        `Component.isVisible()`

    - #### isVisible

          public boolean isVisible()

      Returns true if the popup menu is visible (currently being displayed).
      Overrides:
        `isVisible` in class `Component`
      Returns:
        `true` if the component is visible, `false` otherwise
      See Also:
        `Component.setVisible(boolean)`

    - #### setLocation

          public void setLocation(int x,
                         int y)

      Sets the location of the upper left corner of the popup menu using x, y coordinates.
      Overrides:
        `setLocation` in class `Component`
      Parameters:
        `x` - the x coordinate of the popup's new position in the screen's coordinate space
        `y` - the y coordinate of the popup's new position in the screen's coordinate space
      See Also:
        `Component.getLocation()`, `Component.setBounds(int, int, int, int)`

    - #### getInvoker

          public Component getInvoker()

      Returns the component which is the 'invoker' of this popup menu.
      Returns:
        the `Component` in which the popup menu is displayed

    - #### setInvoker

          public void setInvoker(Component invoker)

      Sets the invoker of this popup menu -- the component in which the popup menu menu is to be displayed.
      Parameters:
        `invoker` - the `Component` in which the popup menu is displayed

    - #### show

          public void show(Component invoker,
                  int x,
                  int y)

      Displays the popup menu at the position x,y in the coordinate space of the component invoker.
      Parameters:
        `invoker` - the component in whose space the popup menu is to appear
        `x` - the x coordinate in invoker's coordinate space at which the popup menu is to be displayed
        `y` - the y coordinate in invoker's coordinate space at which the popup menu is to be displayed

    - #### getComponentAtIndex

          @Deprecated
          public Component getComponentAtIndex(int i)

      Deprecated. replaced by `Container.getComponent(int)`
      Returns the component at the specified index.
      Parameters:
        `i` - the index of the component, where 0 is the first
      Returns:
        the `Component` at that index

    - #### getComponentIndex

          public int getComponentIndex(Component c)

      Returns the index of the specified component.
      Parameters:
        `c` - the `Component` to find
      Returns:
        the index of the component, where 0 is the first; or -1 if the component is not found

    - #### setPopupSize

          public void setPopupSize(Dimension d)

      Sets the size of the Popup window using a `Dimension` object. This is equivalent to `setPreferredSize(d)`.
      Parameters:
        `d` - the `Dimension` specifying the new size of this component.

    - #### setPopupSize

          public void setPopupSize(int width,
                          int height)

      Sets the size of the Popup window to the specified width and height. This is equivalent to `setPreferredSize(new Dimension(width, height))`.
      Parameters:
        `width` - the new width of the Popup in pixels
        `height` - the new height of the Popup in pixels

    - #### setSelected

          public void setSelected(Component sel)

      Sets the currently selected component, This will result in a change to the selection model.
      Parameters:
        `sel` - the `Component` to select

    - #### isBorderPainted

          public boolean isBorderPainted()

      Checks whether the border should be painted.
      Returns:
        true if the border is painted, false otherwise
      See Also:
        `setBorderPainted(boolean)`

    - #### setBorderPainted

          public void setBorderPainted(boolean b)

      Sets whether the border should be painted.
      Parameters:
        `b` - if true, the border is painted.
      See Also:
        `isBorderPainted()`

    - #### paintBorder

          protected void paintBorder(Graphics g)

      Paints the popup menu's border if the `borderPainted` property is `true`.
      Overrides:
        `paintBorder` in class `JComponent`
      Parameters:
        `g` - the `Graphics` object
      See Also:
        `JComponent.paint(java.awt.Graphics)`, `JComponent.setBorder(javax.swing.border.Border)`

    - #### getMargin

          public Insets getMargin()

      Returns the margin, in pixels, between the popup menu's border and its containees.
      Returns:
        an `Insets` object containing the margin values.

    - #### paramString

          protected String paramString()

      Returns a string representation of this `JPopupMenu`. 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 `JComponent`
      Returns:
        a string representation of this `JPopupMenu`.

    - #### getAccessibleContext

          public AccessibleContext getAccessibleContext()

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

    - #### processMouseEvent

          public void processMouseEvent(MouseEvent event,
                               MenuElement[] path,
                               MenuSelectionManager manager)

      This method is required to conform to the `MenuElement` interface, but it not implemented.
      Specified by:
        `processMouseEvent` in interface `MenuElement`
      See Also:
        `MenuElement.processMouseEvent(MouseEvent, MenuElement[], 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`

    - #### menuSelectionChanged

          public void menuSelectionChanged(boolean isIncluded)

      Messaged when the menubar selection changes to activate or deactivate this menu. This implements the `javax.swing.MenuElement` interface. Overrides `MenuElement.menuSelectionChanged`.
      Specified by:
        `menuSelectionChanged` in interface `MenuElement`
      Parameters:
        `isIncluded` - true if this menu is active, false if it is not
      See Also:
        `MenuElement.menuSelectionChanged(boolean)`

    - #### getSubElements

          public MenuElement[] getSubElements()

      Returns an array of `MenuElement`s containing the submenu for this menu component. It will only return items conforming to the `JMenuElement` interface. If popup menu is `null` returns an empty array. This method is required to conform to the `MenuElement` interface.
      Specified by:
        `getSubElements` in interface `MenuElement`
      Returns:
        an array of `MenuElement` objects
      See Also:
        `MenuElement.getSubElements()`

    - #### getComponent

          public Component getComponent()

      Returns this `JPopupMenu` component.
      Specified by:
        `getComponent` in interface `MenuElement`
      Returns:
        this `JPopupMenu` object
      See Also:
        `MenuElement.getComponent()`

    - #### isPopupTrigger

          public boolean isPopupTrigger(MouseEvent e)

      Returns true if the `MouseEvent` is considered a popup trigger by the `JPopupMenu`'s currently installed UI.
      Returns:
        true if the mouse event is a popup trigger
      Since:
        1.3

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