Module javafx.controls
Package javafx.scene.control

## Class MenuItem

- java.lang.Object
- - javafx.scene.control.MenuItem

- All Implemented Interfaces:
    `Styleable`, `EventTarget`
  Direct Known Subclasses:
    `CheckMenuItem`, `CustomMenuItem`, `Menu`, `RadioMenuItem`

      @IDProperty("id")
      public class MenuItem
      extends Object
      implements EventTarget, Styleable

  MenuItem is intended to be used in conjunction with `Menu` to provide options to users. MenuItem serves as the base class for the bulk of JavaFX menus API. It has a display `text` property, as well as an optional `graphic` node that can be set on it. The `accelerator` property enables accessing the associated action in one keystroke. Also, as with the `Button` control, by using the `setOnAction(javafx.event.EventHandler<javafx.event.ActionEvent>)` method, you can have an instance of MenuItem perform any action you wish.

  Note: Whilst any size of graphic can be inserted into a MenuItem, the most commonly used size in most applications is 16x16 pixels. This is the recommended graphic dimension to use if you're using the default style provided by JavaFX.

  To create a MenuItem is simple:

      MenuItem menuItem = new MenuItem("Open");
      menuItem.setOnAction(e -> System.out.println("Opening Database Connection..."));
      Circle graphic = new Circle(8);
      graphic.setFill(Color.GREEN);
      menuItem.setGraphic(graphic);

      Menu menu = new Menu("File");
      menu.getItems().add(menuItem);
      MenuBar menuBar = new MenuBar(menu);

  Since:
    JavaFX 2.0
  See Also:
    `Menu`

- - ### Property Summary

    Properties
    Type | Property | Description
    --- | --- | ---
    `ObjectProperty<KeyCombination>` | `accelerator` | The accelerator property enables accessing the associated action in one keystroke.
    `BooleanProperty` | `disable` | Sets the individual disabled state of this MenuItem.
    `ObjectProperty<Node>` | `graphic` | An optional graphic for the `MenuItem`.
    `StringProperty` | `id` | The id of this MenuItem.
    `BooleanProperty` | `mnemonicParsing` | MnemonicParsing property to enable/disable text parsing.
    `ObjectProperty<EventHandler<ActionEvent>>` | `onAction` | The action, which is invoked whenever the MenuItem is fired.
    `ObjectProperty<EventHandler<Event>>` | `onMenuValidation` | The event handler that is associated with invocation of an accelerator for a MenuItem.
    `ReadOnlyObjectProperty<Menu>` | `parentMenu` | This is the `Menu` in which this `MenuItem` exists.
    `ReadOnlyObjectProperty<ContextMenu>` | `parentPopup` | This is the `ContextMenu` in which this `MenuItem` exists.
    `StringProperty` | `style` | A string representation of the CSS style associated with this specific MenuItem.
    `StringProperty` | `text` | The text to display in the `MenuItem`.
    `BooleanProperty` | `visible` | Specifies whether this MenuItem should be rendered as part of the scene graph.

  - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `static EventType<Event>` | `MENU_VALIDATION_EVENT` | Called when a accelerator for the Menuitem is invoked

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `MenuItem()` | Constructs a MenuItem with no display text.
    `MenuItem​(String text)` | Constructs a MenuItem and sets the display text with the specified text
    `MenuItem​(String text, Node graphic)` | Constructor s MenuItem and sets the display text with the specified text and sets the graphic `Node` to the given node.

  - ### Method Summary

    Modifier and Type | Method | Description
    --- | --- | ---
    `ObjectProperty<KeyCombination>` | `acceleratorProperty()` | The accelerator property enables accessing the associated action in one keystroke.
    `<E extends Event> void` | `addEventHandler​(EventType<E> eventType, EventHandler<E> eventHandler)` | Registers an event handler to this MenuItem.
    `EventDispatchChain` | `buildEventDispatchChain​(EventDispatchChain tail)` | Construct an event dispatch chain for this target.
    `BooleanProperty` | `disableProperty()` | Sets the individual disabled state of this MenuItem.
    `void` | `fire()` | Fires a new ActionEvent.
    `KeyCombination` | `getAccelerator()` | Gets the value of the property accelerator.
    `List<CssMetaData<? extends Styleable,​?>>` | `getCssMetaData()` | The CssMetaData of this Styleable.
    `Node` | `getGraphic()` | Gets the value of the property graphic.
    `String` | `getId()` | Gets the value of the property id.
    `EventHandler<ActionEvent>` | `getOnAction()` | Gets the value of the property onAction.
    `EventHandler<Event>` | `getOnMenuValidation()` | Gets the value of the property onMenuValidation.
    `Menu` | `getParentMenu()` | Gets the value of the property parentMenu.
    `ContextMenu` | `getParentPopup()` | Gets the value of the property parentPopup.
    `ObservableMap<Object,​Object>` | `getProperties()` | Returns an observable map of properties on this menu item for use primarily by application developers.
    `ObservableSet<PseudoClass>` | `getPseudoClassStates()` | Return the pseudo-class state of this Styleable.
    `String` | `getStyle()` | Gets the value of the property style.
    `Node` | `getStyleableNode()` | Returns the Node that represents this Styleable object.
    `Styleable` | `getStyleableParent()` | Return the parent of this Styleable, or null if there is no parent.
    `ObservableList<String>` | `getStyleClass()` | * Public API * *
    `String` | `getText()` | Gets the value of the property text.
    `String` | `getTypeSelector()` | The type of this `Styleable` that is to be used in selector matching.
    `Object` | `getUserData()` | Returns a previously set Object property, or null if no such property has been set using the `setUserData(java.lang.Object)` method.
    `ObjectProperty<Node>` | `graphicProperty()` | An optional graphic for the `MenuItem`.
    `StringProperty` | `idProperty()` | The id of this MenuItem.
    `boolean` | `isDisable()` | Gets the value of the property disable.
    `boolean` | `isMnemonicParsing()` | Gets the value of the property mnemonicParsing.
    `boolean` | `isVisible()` | Gets the value of the property visible.
    `BooleanProperty` | `mnemonicParsingProperty()` | MnemonicParsing property to enable/disable text parsing.
    `ObjectProperty<EventHandler<ActionEvent>>` | `onActionProperty()` | The action, which is invoked whenever the MenuItem is fired.
    `ObjectProperty<EventHandler<Event>>` | `onMenuValidationProperty()` | The event handler that is associated with invocation of an accelerator for a MenuItem.
    `ReadOnlyObjectProperty<Menu>` | `parentMenuProperty()` | This is the `Menu` in which this `MenuItem` exists.
    `ReadOnlyObjectProperty<ContextMenu>` | `parentPopupProperty()` | This is the `ContextMenu` in which this `MenuItem` exists.
    `<E extends Event> void` | `removeEventHandler​(EventType<E> eventType, EventHandler<E> eventHandler)` | Unregisters a previously registered event handler from this MenuItem.
    `void` | `setAccelerator​(KeyCombination value)` | Sets the value of the property accelerator.
    `void` | `setDisable​(boolean value)` | Sets the value of the property disable.
    `void` | `setGraphic​(Node value)` | Sets the value of the property graphic.
    `void` | `setId​(String value)` | Sets the value of the property id.
    `void` | `setMnemonicParsing​(boolean value)` | Sets the value of the property mnemonicParsing.
    `void` | `setOnAction​(EventHandler<ActionEvent> value)` | Sets the value of the property onAction.
    `void` | `setOnMenuValidation​(EventHandler<Event> value)` | Sets the value of the property onMenuValidation.
    `protected void` | `setParentMenu​(Menu value)` | Sets the value of the property parentMenu.
    `protected void` | `setParentPopup​(ContextMenu value)` | Sets the value of the property parentPopup.
    `void` | `setStyle​(String value)` | Sets the value of the property style.
    `void` | `setText​(String value)` | Sets the value of the property text.
    `void` | `setUserData​(Object value)` | Convenience method for setting a single Object property that can be retrieved at a later date.
    `void` | `setVisible​(boolean value)` | Sets the value of the property visible.
    `StringProperty` | `styleProperty()` | A string representation of the CSS style associated with this specific MenuItem.
    `StringProperty` | `textProperty()` | The text to display in the `MenuItem`.
    `String` | `toString()` |
    `BooleanProperty` | `visibleProperty()` | Specifies whether this MenuItem should be rendered as part of the scene graph.

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

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

- - ### Property Detail

    - #### id

          public final StringProperty idProperty

      The id of this MenuItem. This simple string identifier is useful for finding a specific MenuItem within the scene graph.
      See Also:
        `getId()`, `setId(String)`

    - #### style

          public final StringProperty styleProperty

      A string representation of the CSS style associated with this specific MenuItem. This is analogous to the "style" attribute of an HTML element. Note that, like the HTML style attribute, this variable contains style properties and values and not the selector portion of a style rule.
      See Also:
        `getStyle()`, `setStyle(String)`

    - #### parentMenu

          public final ReadOnlyObjectProperty<Menu> parentMenuProperty

      This is the `Menu` in which this `MenuItem` exists. It is possible for an instance of this class to not have a `parentMenu` - this means that this instance is either:
      - Not yet associated with its `parentMenu`.
      - A 'root' `Menu` (i.e. it is a context menu, attached directly to a `MenuBar`, `MenuButton`, or any of the other controls that use `Menu` internally.
      See Also:
        `getParentMenu()`, `setParentMenu(Menu)`

    - #### parentPopup

          public final ReadOnlyObjectProperty<ContextMenu> parentPopupProperty

      This is the `ContextMenu` in which this `MenuItem` exists.
      See Also:
        `getParentPopup()`, `setParentPopup(ContextMenu)`

    - #### text

          public final StringProperty textProperty

      The text to display in the `MenuItem`.
      See Also:
        `getText()`, `setText(String)`

    - #### graphic

          public final ObjectProperty<Node> graphicProperty

      An optional graphic for the `MenuItem`. This will normally be an `ImageView` node, but there is no requirement for this to be the case.
      See Also:
        `getGraphic()`, `setGraphic(Node)`

    - #### onAction

          public final ObjectProperty<EventHandler<ActionEvent>> onActionProperty

      The action, which is invoked whenever the MenuItem is fired. This may be due to the user clicking on the button with the mouse, or by a touch event, or by a key press, or if the developer programatically invokes the `fire()` method.
      See Also:
        `getOnAction()`, `setOnAction(EventHandler)`

    - #### onMenuValidation

          public final ObjectProperty<EventHandler<Event>> onMenuValidationProperty

      The event handler that is associated with invocation of an accelerator for a MenuItem. This can happen when a key sequence for an accelerator is pressed. The event handler is also invoked when onShowing event handler is called.
      Since:
        JavaFX 2.2
      See Also:
        `getOnMenuValidation()`, `setOnMenuValidation(EventHandler)`

    - #### disable

          public final BooleanProperty disableProperty

      Sets the individual disabled state of this MenuItem. Setting disable to true will cause this MenuItem to become disabled.
      See Also:
        `isDisable()`, `setDisable(boolean)`

    - #### visible

          public final BooleanProperty visibleProperty

      Specifies whether this MenuItem should be rendered as part of the scene graph.
      See Also:
        `isVisible()`, `setVisible(boolean)`

    - #### accelerator

          public final ObjectProperty<KeyCombination> acceleratorProperty

      The accelerator property enables accessing the associated action in one keystroke. It is a convenience offered to perform quickly a given action.
      See Also:
        `getAccelerator()`, `setAccelerator(KeyCombination)`

    - #### mnemonicParsing

          public final BooleanProperty mnemonicParsingProperty

      MnemonicParsing property to enable/disable text parsing. If this is set to true, then the MenuItem text will be parsed to see if it contains the mnemonic parsing character '_'. When a mnemonic is detected the key combination will be determined based on the succeeding character, and the mnemonic added.

      The default value for MenuItem is true.

      See Also:
        `isMnemonicParsing()`, `setMnemonicParsing(boolean)`

  - ### Field Detail

    - #### MENU_VALIDATION_EVENT

          public static final EventType<Event> MENU_VALIDATION_EVENT

      Called when a accelerator for the Menuitem is invoked

      Since:
        JavaFX 2.2

  - ### Constructor Detail

    - #### MenuItem

          public MenuItem()

      Constructs a MenuItem with no display text.

    - #### MenuItem

          public MenuItem​(String text)

      Constructs a MenuItem and sets the display text with the specified text
      Parameters:
        `text` - the display text
      See Also:
        `setText(java.lang.String)`

    - #### MenuItem

          public MenuItem​(String text,
                          Node graphic)

      Constructor s MenuItem and sets the display text with the specified text and sets the graphic `Node` to the given node.
      Parameters:
        `text` - the display text
        `graphic` - the graphic node
      See Also:
        `setText(java.lang.String)`, `setGraphic(javafx.scene.Node)`

  - ### Method Detail

    - #### setId

          public final void setId​(String value)

      Sets the value of the property id.
      Property description:
        The id of this MenuItem. This simple string identifier is useful for finding a specific MenuItem within the scene graph.

    - #### getId

          public final String getId()

      Gets the value of the property id.
      Specified by:
        `getId` in interface `Styleable`
      Property description:
        The id of this MenuItem. This simple string identifier is useful for finding a specific MenuItem within the scene graph.
      Returns:
        the id of this `Styleable`

    - #### idProperty

          public final StringProperty idProperty()

      The id of this MenuItem. This simple string identifier is useful for finding a specific MenuItem within the scene graph.
      See Also:
        `getId()`, `setId(String)`

    - #### setStyle

          public final void setStyle​(String value)

      Sets the value of the property style.
      Property description:
        A string representation of the CSS style associated with this specific MenuItem. This is analogous to the "style" attribute of an HTML element. Note that, like the HTML style attribute, this variable contains style properties and values and not the selector portion of a style rule.

    - #### getStyle

          public final String getStyle()

      Gets the value of the property style.
      Specified by:
        `getStyle` in interface `Styleable`
      Property description:
        A string representation of the CSS style associated with this specific MenuItem. This is analogous to the "style" attribute of an HTML element. Note that, like the HTML style attribute, this variable contains style properties and values and not the selector portion of a style rule.
      Returns:
        a string representation of the CSS style associated with this specific `Node`

    - #### styleProperty

          public final StringProperty styleProperty()

      A string representation of the CSS style associated with this specific MenuItem. This is analogous to the "style" attribute of an HTML element. Note that, like the HTML style attribute, this variable contains style properties and values and not the selector portion of a style rule.
      See Also:
        `getStyle()`, `setStyle(String)`

    - #### setParentMenu

          protected final void setParentMenu​(Menu value)

      Sets the value of the property parentMenu.
      Property description:
        This is the `Menu` in which this `MenuItem` exists. It is possible for an instance of this class to not have a `parentMenu` - this means that this instance is either:
        - Not yet associated with its `parentMenu`.
        - A 'root' `Menu` (i.e. it is a context menu, attached directly to a `MenuBar`, `MenuButton`, or any of the other controls that use `Menu` internally.

    - #### getParentMenu

          public final Menu getParentMenu()

      Gets the value of the property parentMenu.
      Property description:
        This is the `Menu` in which this `MenuItem` exists. It is possible for an instance of this class to not have a `parentMenu` - this means that this instance is either:
        - Not yet associated with its `parentMenu`.
        - A 'root' `Menu` (i.e. it is a context menu, attached directly to a `MenuBar`, `MenuButton`, or any of the other controls that use `Menu` internally.

    - #### parentMenuProperty

          public final ReadOnlyObjectProperty<Menu> parentMenuProperty()

      This is the `Menu` in which this `MenuItem` exists. It is possible for an instance of this class to not have a `parentMenu` - this means that this instance is either:
      - Not yet associated with its `parentMenu`.
      - A 'root' `Menu` (i.e. it is a context menu, attached directly to a `MenuBar`, `MenuButton`, or any of the other controls that use `Menu` internally.
      See Also:
        `getParentMenu()`, `setParentMenu(Menu)`

    - #### setParentPopup

          protected final void setParentPopup​(ContextMenu value)

      Sets the value of the property parentPopup.
      Property description:
        This is the `ContextMenu` in which this `MenuItem` exists.

    - #### getParentPopup

          public final ContextMenu getParentPopup()

      Gets the value of the property parentPopup.
      Property description:
        This is the `ContextMenu` in which this `MenuItem` exists.

    - #### parentPopupProperty

          public final ReadOnlyObjectProperty<ContextMenu> parentPopupProperty()

      This is the `ContextMenu` in which this `MenuItem` exists.
      See Also:
        `getParentPopup()`, `setParentPopup(ContextMenu)`

    - #### setText

          public final void setText​(String value)

      Sets the value of the property text.
      Property description:
        The text to display in the `MenuItem`.

    - #### getText

          public final String getText()

      Gets the value of the property text.
      Property description:
        The text to display in the `MenuItem`.

    - #### textProperty

          public final StringProperty textProperty()

      The text to display in the `MenuItem`.
      See Also:
        `getText()`, `setText(String)`

    - #### setGraphic

          public final void setGraphic​(Node value)

      Sets the value of the property graphic.
      Property description:
        An optional graphic for the `MenuItem`. This will normally be an `ImageView` node, but there is no requirement for this to be the case.

    - #### getGraphic

          public final Node getGraphic()

      Gets the value of the property graphic.
      Property description:
        An optional graphic for the `MenuItem`. This will normally be an `ImageView` node, but there is no requirement for this to be the case.

    - #### graphicProperty

          public final ObjectProperty<Node> graphicProperty()

      An optional graphic for the `MenuItem`. This will normally be an `ImageView` node, but there is no requirement for this to be the case.
      See Also:
        `getGraphic()`, `setGraphic(Node)`

    - #### setOnAction

          public final void setOnAction​(EventHandler<ActionEvent> value)

      Sets the value of the property onAction.
      Property description:
        The action, which is invoked whenever the MenuItem is fired. This may be due to the user clicking on the button with the mouse, or by a touch event, or by a key press, or if the developer programatically invokes the `fire()` method.

    - #### getOnAction

          public final EventHandler<ActionEvent> getOnAction()

      Gets the value of the property onAction.
      Property description:
        The action, which is invoked whenever the MenuItem is fired. This may be due to the user clicking on the button with the mouse, or by a touch event, or by a key press, or if the developer programatically invokes the `fire()` method.

    - #### onActionProperty

          public final ObjectProperty<EventHandler<ActionEvent>> onActionProperty()

      The action, which is invoked whenever the MenuItem is fired. This may be due to the user clicking on the button with the mouse, or by a touch event, or by a key press, or if the developer programatically invokes the `fire()` method.
      See Also:
        `getOnAction()`, `setOnAction(EventHandler)`

    - #### setOnMenuValidation

          public final void setOnMenuValidation​(EventHandler<Event> value)

      Sets the value of the property onMenuValidation.
      Property description:
        The event handler that is associated with invocation of an accelerator for a MenuItem. This can happen when a key sequence for an accelerator is pressed. The event handler is also invoked when onShowing event handler is called.
      Since:
        JavaFX 2.2

    - #### getOnMenuValidation

          public final EventHandler<Event> getOnMenuValidation()

      Gets the value of the property onMenuValidation.
      Property description:
        The event handler that is associated with invocation of an accelerator for a MenuItem. This can happen when a key sequence for an accelerator is pressed. The event handler is also invoked when onShowing event handler is called.
      Since:
        JavaFX 2.2

    - #### onMenuValidationProperty

          public final ObjectProperty<EventHandler<Event>> onMenuValidationProperty()

      The event handler that is associated with invocation of an accelerator for a MenuItem. This can happen when a key sequence for an accelerator is pressed. The event handler is also invoked when onShowing event handler is called.
      Since:
        JavaFX 2.2
      See Also:
        `getOnMenuValidation()`, `setOnMenuValidation(EventHandler)`

    - #### setDisable

          public final void setDisable​(boolean value)

      Sets the value of the property disable.
      Property description:
        Sets the individual disabled state of this MenuItem. Setting disable to true will cause this MenuItem to become disabled.

    - #### isDisable

          public final boolean isDisable()

      Gets the value of the property disable.
      Property description:
        Sets the individual disabled state of this MenuItem. Setting disable to true will cause this MenuItem to become disabled.

    - #### disableProperty

          public final BooleanProperty disableProperty()

      Sets the individual disabled state of this MenuItem. Setting disable to true will cause this MenuItem to become disabled.
      See Also:
        `isDisable()`, `setDisable(boolean)`

    - #### setVisible

          public final void setVisible​(boolean value)

      Sets the value of the property visible.
      Property description:
        Specifies whether this MenuItem should be rendered as part of the scene graph.

    - #### isVisible

          public final boolean isVisible()

      Gets the value of the property visible.
      Property description:
        Specifies whether this MenuItem should be rendered as part of the scene graph.

    - #### visibleProperty

          public final BooleanProperty visibleProperty()

      Specifies whether this MenuItem should be rendered as part of the scene graph.
      See Also:
        `isVisible()`, `setVisible(boolean)`

    - #### setAccelerator

          public final void setAccelerator​(KeyCombination value)

      Sets the value of the property accelerator.
      Property description:
        The accelerator property enables accessing the associated action in one keystroke. It is a convenience offered to perform quickly a given action.

    - #### getAccelerator

          public final KeyCombination getAccelerator()

      Gets the value of the property accelerator.
      Property description:
        The accelerator property enables accessing the associated action in one keystroke. It is a convenience offered to perform quickly a given action.

    - #### acceleratorProperty

          public final ObjectProperty<KeyCombination> acceleratorProperty()

      The accelerator property enables accessing the associated action in one keystroke. It is a convenience offered to perform quickly a given action.
      See Also:
        `getAccelerator()`, `setAccelerator(KeyCombination)`

    - #### setMnemonicParsing

          public final void setMnemonicParsing​(boolean value)

      Sets the value of the property mnemonicParsing.
      Property description:
        MnemonicParsing property to enable/disable text parsing. If this is set to true, then the MenuItem text will be parsed to see if it contains the mnemonic parsing character '_'. When a mnemonic is detected the key combination will be determined based on the succeeding character, and the mnemonic added.

        The default value for MenuItem is true.

    - #### isMnemonicParsing

          public final boolean isMnemonicParsing()

      Gets the value of the property mnemonicParsing.
      Property description:
        MnemonicParsing property to enable/disable text parsing. If this is set to true, then the MenuItem text will be parsed to see if it contains the mnemonic parsing character '_'. When a mnemonic is detected the key combination will be determined based on the succeeding character, and the mnemonic added.

        The default value for MenuItem is true.

    - #### mnemonicParsingProperty

          public final BooleanProperty mnemonicParsingProperty()

      MnemonicParsing property to enable/disable text parsing. If this is set to true, then the MenuItem text will be parsed to see if it contains the mnemonic parsing character '_'. When a mnemonic is detected the key combination will be determined based on the succeeding character, and the mnemonic added.

      The default value for MenuItem is true.

      See Also:
        `isMnemonicParsing()`, `setMnemonicParsing(boolean)`

    - #### getStyleClass

          public ObservableList<String> getStyleClass()

      * Public API * *
      Specified by:
        `getStyleClass` in interface `Styleable`
      Returns:
        a list of String identifiers which can be used to logically group Nodes, specifically for an external style engine
      See Also:
        CSS3 class selectors

    - #### fire

          public void fire()

      Fires a new ActionEvent.

    - #### addEventHandler

          public <E extends Event> void addEventHandler​(EventType<E> eventType,
                                                        EventHandler<E> eventHandler)

      Registers an event handler to this MenuItem. The handler is called when the menu item receives an `Event` of the specified type during the bubbling phase of event delivery.
      Type Parameters:
        `E` - the specific event class of the handler
      Parameters:
        `eventType` - the type of the events to receive by the handler
        `eventHandler` - the handler to register
      Throws:
        `NullPointerException` - if the event type or handler is null

    - #### removeEventHandler

          public <E extends Event> void removeEventHandler​(EventType<E> eventType,
                                                           EventHandler<E> eventHandler)

      Unregisters a previously registered event handler from this MenuItem. One handler might have been registered for different event types, so the caller needs to specify the particular event type from which to unregister the handler.
      Type Parameters:
        `E` - the specific event class of the handler
      Parameters:
        `eventType` - the event type from which to unregister
        `eventHandler` - the handler to unregister
      Throws:
        `NullPointerException` - if the event type or handler is null

    - #### buildEventDispatchChain

          public EventDispatchChain buildEventDispatchChain​(EventDispatchChain tail)

      Construct an event dispatch chain for this target. The event dispatch chain contains event dispatchers which might be interested in processing of events targeted at this `EventTarget`. This event target is not automatically added to the chain, so if it wants to process events, it needs to add an `EventDispatcher` for itself to the chain.

      In the case the event target is part of some hierarchy, the chain for it is usually built from event dispatchers collected from the root of the hierarchy to the event target.

      The event dispatch chain is constructed by modifications to the provided initial event dispatch chain. The returned chain should have the initial chain at its end so the dispatchers should be prepended to the initial chain.

      The caller shouldn't assume that the initial chain remains unchanged nor that the returned value will reference a different chain.

      Specified by:
        `buildEventDispatchChain` in interface `EventTarget`
      Parameters:
        `tail` - the initial chain to build from
      Returns:
        the resulting event dispatch chain for this target

    - #### getUserData

          public Object getUserData()

      Returns a previously set Object property, or null if no such property has been set using the `setUserData(java.lang.Object)` method.
      Returns:
        The Object that was previously set, or null if no property has been set or if null was set.

    - #### setUserData

          public void setUserData​(Object value)

      Convenience method for setting a single Object property that can be retrieved at a later date. This is functionally equivalent to calling the getProperties().put(Object key, Object value) method. This can later be retrieved by calling `Node.getUserData()`.
      Parameters:
        `value` - The value to be stored - this can later be retrieved by calling `Node.getUserData()`.

    - #### getProperties

          public ObservableMap<Object,​Object> getProperties()

      Returns an observable map of properties on this menu item for use primarily by application developers.
      Returns:
        an observable map of properties on this menu item for use primarily by application developers

    - #### getTypeSelector

          public String getTypeSelector()

      The type of this `Styleable` that is to be used in selector matching. This is analogous to an "element" in HTML. (CSS Type Selector).
      Specified by:
        `getTypeSelector` in interface `Styleable`
      Returns:
        "MenuItem"
      Since:
        JavaFX 8.0

    - #### getStyleableParent

          public Styleable getStyleableParent()

      Return the parent of this Styleable, or null if there is no parent.
      Specified by:
        `getStyleableParent` in interface `Styleable`
      Returns:
        `getParentMenu()`, or `getParentPopup()` if `parentMenu` is null
      Since:
        JavaFX 8.0

    - #### getPseudoClassStates

          public final ObservableSet<PseudoClass> getPseudoClassStates()

      Return the pseudo-class state of this Styleable. CSS assumes this set is read-only.
      Specified by:
        `getPseudoClassStates` in interface `Styleable`
      Returns:
        the pseudo-class state
      Since:
        JavaFX 8.0

    - #### getCssMetaData

          public List<CssMetaData<? extends Styleable,​?>> getCssMetaData()

      Description copied from interface: `Styleable`
      The CssMetaData of this Styleable. This may be returned as an unmodifiable list.
      Specified by:
        `getCssMetaData` in interface `Styleable`
      Returns:
        the CssMetaData

    - #### getStyleableNode

          public Node getStyleableNode()

      Returns the Node that represents this Styleable object. This method should be overridden in cases where the Styleable is not itself a Node, so that it may optionally return the relevant root node representation of itself. By default this method returns null, which can mean that either the Styleable itself is a Node, or if that is not the case, that the Styleable does not have a node representation available at the time of request.
      Specified by:
        `getStyleableNode` in interface `Styleable`
      Returns:
        the Node that represents this Styleable object

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`