# Class JList.AccessibleJList

java.lang.Object
javax.accessibility.AccessibleContext
java.awt.Component.AccessibleAWTComponent
java.awt.Container.AccessibleAWTContainer
javax.swing.JComponent.AccessibleJComponent
javax.swing.JList.AccessibleJList

All Implemented Interfaces:
  `PropertyChangeListener, Serializable, EventListener, AccessibleComponent, AccessibleExtendedComponent, AccessibleSelection, ListDataListener, ListSelectionListener`

Enclosing class:
  `JList<E>`

protected class JList.AccessibleJList extends JComponent.AccessibleJComponent implements AccessibleSelection, PropertyChangeListener, ListSelectionListener, ListDataListener
This class implements accessibility support for the `JList` class. It provides an implementation of the Java Accessibility API appropriate to list user-interface elements.

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

Since:
  1.2

- ## Nested Class Summary

  Nested Classes
  Modifier and Type
  Class
  Description
  `protected class`
  `JList.AccessibleJList.AccessibleJListChild`
  This class implements accessibility support appropriate for list children.

  ### Nested classes/interfaces declared in class JComponent.AccessibleJComponent

  `JComponent.AccessibleJComponent.AccessibleContainerHandler, JComponent.AccessibleJComponent.AccessibleFocusHandler`
  Modifier and Type
  Class
  Description
  `protected class`
  `JComponent.AccessibleJComponent.AccessibleContainerHandler`
  Fire PropertyChange listener, if one is registered, when children added/removed.
  `protected class`
  `JComponent.AccessibleJComponent.AccessibleFocusHandler`
  Deprecated.
  This class is no longer used or needed.

  ### Nested classes/interfaces declared in class Component.AccessibleAWTComponent

  `Component.AccessibleAWTComponent.AccessibleAWTComponentHandler, Component.AccessibleAWTComponent.AccessibleAWTFocusHandler`
  Modifier and Type
  Class
  Description
  `protected class`
  `Component.AccessibleAWTComponent.AccessibleAWTComponentHandler`
  Fire PropertyChange listener, if one is registered, when shown/hidden..
  `protected class`
  `Component.AccessibleAWTComponent.AccessibleAWTFocusHandler`
  Fire PropertyChange listener, if one is registered, when focus events happen

- ## Field Summary

  ### Fields declared in class JComponent.AccessibleJComponent

  `accessibleFocusHandler`
  Modifier and Type
  Field
  Description
  `protected FocusListener`
  `accessibleFocusHandler`
  Deprecated.

  ### Fields declared in class Container.AccessibleAWTContainer

  `accessibleContainerHandler`
  Modifier and Type
  Field
  Description
  `protected ContainerListener`
  `accessibleContainerHandler`
  The handler to fire `PropertyChange` when children are added or removed

  ### Fields declared in class Component.AccessibleAWTComponent

  `accessibleAWTComponentHandler, accessibleAWTFocusHandler`
  Modifier and Type
  Field
  Description
  `protected ComponentListener`
  `accessibleAWTComponentHandler`
  A component listener to track show/hide/resize events and convert them to PropertyChange events.
  `protected FocusListener`
  `accessibleAWTFocusHandler`
  A listener to track focus events and convert them to PropertyChange events.

  ### Fields declared in class AccessibleContext

  `ACCESSIBLE_ACTION_PROPERTY, ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY, ACCESSIBLE_CARET_PROPERTY, ACCESSIBLE_CHILD_PROPERTY, ACCESSIBLE_COMPONENT_BOUNDS_CHANGED, ACCESSIBLE_DESCRIPTION_PROPERTY, ACCESSIBLE_HYPERTEXT_OFFSET, ACCESSIBLE_INVALIDATE_CHILDREN, ACCESSIBLE_NAME_PROPERTY, ACCESSIBLE_SELECTION_PROPERTY, ACCESSIBLE_STATE_PROPERTY, ACCESSIBLE_TABLE_CAPTION_CHANGED, ACCESSIBLE_TABLE_COLUMN_DESCRIPTION_CHANGED, ACCESSIBLE_TABLE_COLUMN_HEADER_CHANGED, ACCESSIBLE_TABLE_MODEL_CHANGED, ACCESSIBLE_TABLE_ROW_DESCRIPTION_CHANGED, ACCESSIBLE_TABLE_ROW_HEADER_CHANGED, ACCESSIBLE_TABLE_SUMMARY_CHANGED, ACCESSIBLE_TEXT_ATTRIBUTES_CHANGED, ACCESSIBLE_TEXT_PROPERTY, ACCESSIBLE_VALUE_PROPERTY, ACCESSIBLE_VISIBLE_DATA_PROPERTY, accessibleDescription, accessibleName, accessibleParent`
  Modifier and Type
  Field
  Description
  `static final String`
  `ACCESSIBLE_ACTION_PROPERTY`
  Constant used to indicate that the supported set of actions has changed.
  `static final String`
  `ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY`
  Constant used to determine when the active descendant of a component has changed.
  `static final String`
  `ACCESSIBLE_CARET_PROPERTY`
  Constant used to determine when the `accessibleText` caret has changed.
  `static final String`
  `ACCESSIBLE_CHILD_PROPERTY`
  Constant used to determine when `Accessible` children are added/removed from the object.
  `static final String`
  `ACCESSIBLE_COMPONENT_BOUNDS_CHANGED`
  `PropertyChangeEvent` which indicates that a change has occurred in a component's bounds.
  `static final String`
  `ACCESSIBLE_DESCRIPTION_PROPERTY`
  Constant used to determine when the `AccessibleContext.accessibleDescription` property has changed.
  `static final String`
  `ACCESSIBLE_HYPERTEXT_OFFSET`
  Constant used to indicate that a hypertext element has received focus.
  `static final String`
  `ACCESSIBLE_INVALIDATE_CHILDREN`
  `PropertyChangeEvent` which indicates that a significant change has occurred to the children of a component like a tree or text.
  `static final String`
  `ACCESSIBLE_NAME_PROPERTY`
  Constant used to determine when the `AccessibleContext.accessibleName` property has changed.
  `static final String`
  `ACCESSIBLE_SELECTION_PROPERTY`
  Constant used to determine when the `accessibleSelection` has changed.
  `static final String`
  `ACCESSIBLE_STATE_PROPERTY`
  Constant used to determine when the `accessibleStateSet` property has changed.
  `static final String`
  `ACCESSIBLE_TABLE_CAPTION_CHANGED`
  Constant used to indicate that the table caption has changed.
  `static final String`
  `ACCESSIBLE_TABLE_COLUMN_DESCRIPTION_CHANGED`
  Constant used to indicate that the column description has changed.
  `static final String`
  `ACCESSIBLE_TABLE_COLUMN_HEADER_CHANGED`
  Constant used to indicate that the column header has changed.
  `static final String`
  `ACCESSIBLE_TABLE_MODEL_CHANGED`
  Constant used to indicate that table data has changed.
  `static final String`
  `ACCESSIBLE_TABLE_ROW_DESCRIPTION_CHANGED`
  Constant used to indicate that the row description has changed.
  `static final String`
  `ACCESSIBLE_TABLE_ROW_HEADER_CHANGED`
  Constant used to indicate that the row header has changed.
  `static final String`
  `ACCESSIBLE_TABLE_SUMMARY_CHANGED`
  Constant used to indicate that the table summary has changed.
  `static final String`
  `ACCESSIBLE_TEXT_ATTRIBUTES_CHANGED`
  `PropertyChangeEvent` which indicates that text attributes have changed.
  `static final String`
  `ACCESSIBLE_TEXT_PROPERTY`
  `PropertyChangeEvent` which indicates that text has changed.
  `static final String`
  `ACCESSIBLE_VALUE_PROPERTY`
  Constant used to determine when the `accessibleValue` property has changed.
  `static final String`
  `ACCESSIBLE_VISIBLE_DATA_PROPERTY`
  Constant used to determine when the visual appearance of the object has changed.
  `protected String`
  `accessibleDescription`
  A localized String containing the description of the object.
  `protected String`
  `accessibleName`
  A localized String containing the name of the object.
  `protected Accessible`
  `accessibleParent`
  The accessible parent of this object.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `AccessibleJList()`
  Constructs an `AccessibleJList`.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `addAccessibleSelection(int i)`
  Adds the specified selected item in the object to the object's selection.
  `void`
  `clearAccessibleSelection()`
  Clears the selection in the object, so that nothing in the object is selected.
  `void`
  `contentsChanged(ListDataEvent e)`
  List Data Listener contents changed method.
  `Accessible`
  `getAccessibleAt(Point p)`
  Returns the `Accessible` child contained at the local coordinate `Point`, if one exists.
  `Accessible`
  `getAccessibleChild(int i)`
  Return the nth Accessible child of the object.
  `int`
  `getAccessibleChildrenCount()`
  Returns the number of accessible children in the object.
  `AccessibleRole`
  `getAccessibleRole()`
  Get the role of this object.
  `AccessibleSelection`
  `getAccessibleSelection()`
  Get the AccessibleSelection associated with this object.
  `Accessible`
  `getAccessibleSelection(int i)`
  Returns an Accessible representing the specified selected item in the object.
  `int`
  `getAccessibleSelectionCount()`
  Returns the number of items currently selected.
  `AccessibleStateSet`
  `getAccessibleStateSet()`
  Get the state set of this object.
  `void`
  `intervalAdded(ListDataEvent e)`
  List Data Listener interval added method.
  `void`
  `intervalRemoved(ListDataEvent e)`
  List Data Listener interval removed method.
  `boolean`
  `isAccessibleChildSelected(int i)`
  Returns true if the current child of this object is selected.
  `void`
  `propertyChange(PropertyChangeEvent e)`
  Property Change Listener change method.
  `void`
  `removeAccessibleSelection(int i)`
  Removes the specified selected item in the object from the object's selection.
  `void`
  `selectAllAccessibleSelection()`
  Causes every selected item in the object to be selected if the object supports multiple selections.
  `void`
  `valueChanged(ListSelectionEvent e)`
  List Selection Listener value change method.

  ### Methods declared in class JComponent.AccessibleJComponent

  `addPropertyChangeListener, getAccessibleDescription, getAccessibleKeyBinding, getAccessibleName, getBorderTitle, getTitledBorderText, getToolTipText, removePropertyChangeListener`
  Modifier and Type
  Method
  Description
  `void`
  `addPropertyChangeListener(PropertyChangeListener listener)`
  Adds a PropertyChangeListener to the listener list.
  `String`
  `getAccessibleDescription()`
  Gets the accessible description of this object.
  `AccessibleKeyBinding`
  `getAccessibleKeyBinding()`
  Returns key bindings associated with this object
  `String`
  `getAccessibleName()`
  Gets the accessible name of this object.
  `protected String`
  `getBorderTitle(Border b)`
  Recursively search through the border hierarchy (if it exists) for a TitledBorder with a non-null title.
  `String`
  `getTitledBorderText()`
  Returns the titled border text
  `String`
  `getToolTipText()`
  Returns the tool tip text
  `void`
  `removePropertyChangeListener(PropertyChangeListener listener)`
  Removes a PropertyChangeListener from the listener list.

  ### Methods declared in class Component.AccessibleAWTComponent

  `addFocusListener, contains, getAccessibleComponent, getAccessibleIndexInParent, getAccessibleParent, getBackground, getBounds, getCursor, getFont, getFontMetrics, getForeground, getLocale, getLocation, getLocationOnScreen, getSize, isEnabled, isFocusTraversable, isShowing, isVisible, removeFocusListener, requestFocus, setBackground, setBounds, setCursor, setEnabled, setFont, setForeground, setLocation, setSize, setVisible`
  Modifier and Type
  Method
  Description
  `void`
  `addFocusListener(FocusListener l)`
  Adds the specified focus listener to receive focus events from this component.
  `boolean`
  `contains(Point p)`
  Checks whether the specified point is within this object's bounds, where the point's x and y coordinates are defined to be relative to the coordinate system of the object.
  `AccessibleComponent`
  `getAccessibleComponent()`
  Gets the `AccessibleComponent` associated with this object if one exists.
  `int`
  `getAccessibleIndexInParent()`
  Gets the index of this object in its accessible parent.
  `Accessible`
  `getAccessibleParent()`
  Gets the `Accessible` parent of this object.
  `Color`
  `getBackground()`
  Gets the background color of this object.
  `Rectangle`
  `getBounds()`
  Gets the bounds of this object in the form of a Rectangle object.
  `Cursor`
  `getCursor()`
  Gets the `Cursor` of this object.
  `Font`
  `getFont()`
  Gets the `Font` of this object.
  `FontMetrics`
  `getFontMetrics(Font f)`
  Gets the `FontMetrics` of this object.
  `Color`
  `getForeground()`
  Gets the foreground color of this object.
  `Locale`
  `getLocale()`
  Returns the locale of this object.
  `Point`
  `getLocation()`
  Gets the location of the object relative to the parent in the form of a point specifying the object's top-left corner in the screen's coordinate space.
  `Point`
  `getLocationOnScreen()`
  Returns the location of the object on the screen.
  `Dimension`
  `getSize()`
  Returns the size of this object in the form of a `Dimension` object.
  `boolean`
  `isEnabled()`
  Determines if the object is enabled.
  `boolean`
  `isFocusTraversable()`
  Returns whether this object can accept focus or not.
  `boolean`
  `isShowing()`
  Determines if the object is showing.
  `boolean`
  `isVisible()`
  Determines if the object is visible.
  `void`
  `removeFocusListener(FocusListener l)`
  Removes the specified focus listener so it no longer receives focus events from this component.
  `void`
  `requestFocus()`
  Requests focus for this object.
  `void`
  `setBackground(Color c)`
  Sets the background color of this object.
  `void`
  `setBounds(Rectangle r)`
  Sets the bounds of this object in the form of a `Rectangle` object.
  `void`
  `setCursor(Cursor cursor)`
  Sets the `Cursor` of this object.
  `void`
  `setEnabled(boolean b)`
  Sets the enabled state of the object.
  `void`
  `setFont(Font f)`
  Sets the `Font` of this object.
  `void`
  `setForeground(Color c)`
  Sets the foreground color of this object.
  `void`
  `setLocation(Point p)`
  Sets the location of the object relative to the parent.
  `void`
  `setSize(Dimension d)`
  Resizes this object so that it has width and height.
  `void`
  `setVisible(boolean b)`
  Sets the visible state of the object.

  ### Methods declared in class AccessibleContext

  `firePropertyChange, getAccessibleAction, getAccessibleEditableText, getAccessibleIcon, getAccessibleRelationSet, getAccessibleTable, getAccessibleText, getAccessibleValue, setAccessibleDescription, setAccessibleName, setAccessibleParent`
  Modifier and Type
  Method
  Description
  `void`
  `firePropertyChange(String propertyName, Object oldValue, Object newValue)`
  Support for reporting bound property changes.
  `AccessibleAction`
  `getAccessibleAction()`
  Gets the `AccessibleAction` associated with this object that supports one or more actions.
  `AccessibleEditableText`
  `getAccessibleEditableText()`
  Gets the `AccessibleEditableText` associated with this object presenting editable text on the display.
  `AccessibleIcon[]`
  `getAccessibleIcon()`
  Gets the `AccessibleIcons` associated with an object that has one or more associated icons.
  `AccessibleRelationSet`
  `getAccessibleRelationSet()`
  Gets the `AccessibleRelationSet` associated with an object.
  `AccessibleTable`
  `getAccessibleTable()`
  Gets the `AccessibleTable` associated with an object.
  `AccessibleText`
  `getAccessibleText()`
  Gets the `AccessibleText` associated with this object presenting text on the display.
  `AccessibleValue`
  `getAccessibleValue()`
  Gets the `AccessibleValue` associated with this object that supports a `Numerical` value.
  `void`
  `setAccessibleDescription(String s)`
  Sets the accessible description of this object.
  `void`
  `setAccessibleName(String s)`
  Sets the localized accessible name of this object.
  `void`
  `setAccessibleParent(Accessible a)`
  Sets the `Accessible` parent of this object.

  ### Methods declared in class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`
  Modifier and Type
  Method
  Description
  `protected Object`
  `clone()`
  Creates and returns a copy of this object.
  `boolean`
  `equals(Object obj)`
  Indicates whether some other object is "equal to" this one.
  `protected void`
  `finalize()`
  Deprecated, for removal: This API element is subject to removal in a future version.
  Finalization is deprecated and subject to removal in a future release.
  `final Class<?>`
  `getClass()`
  Returns the runtime class of this `Object`.
  `int`
  `hashCode()`
  Returns a hash code value for this object.
  `final void`
  `notify()`
  Wakes up a single thread that is waiting on this object's monitor.
  `final void`
  `notifyAll()`
  Wakes up all threads that are waiting on this object's monitor.
  `String`
  `toString()`
  Returns a string representation of the object.
  `final void`
  `wait()`
  Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
  `final void`
  `wait(long timeoutMillis)`
  Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
  `final void`
  `wait(long timeoutMillis, int nanos)`
  Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

- ## Constructor Details

  - ### AccessibleJList

    public AccessibleJList()
    Constructs an `AccessibleJList`.

- ## Method Details

  - ### propertyChange

    public void propertyChange(PropertyChangeEvent e)
    Property Change Listener change method. Used to track changes to the DataModel and ListSelectionModel, in order to re-set listeners to those for reporting changes there via the Accessibility PropertyChange mechanism.
    Specified by:
      `propertyChange` in interface `PropertyChangeListener`
    Parameters:
      `e` - PropertyChangeEvent

  - ### valueChanged

    public void valueChanged(ListSelectionEvent e)
    List Selection Listener value change method. Used to fire the property change
    Specified by:
      `valueChanged` in interface `ListSelectionListener`
    Parameters:
      `e` - ListSelectionEvent

  - ### intervalAdded

    public void intervalAdded(ListDataEvent e)
    List Data Listener interval added method. Used to fire the visible data property change
    Specified by:
      `intervalAdded` in interface `ListDataListener`
    Parameters:
      `e` - ListDataEvent

  - ### intervalRemoved

    public void intervalRemoved(ListDataEvent e)
    List Data Listener interval removed method. Used to fire the visible data property change
    Specified by:
      `intervalRemoved` in interface `ListDataListener`
    Parameters:
      `e` - ListDataEvent

  - ### contentsChanged

    public void contentsChanged(ListDataEvent e)
    List Data Listener contents changed method. Used to fire the visible data property change
    Specified by:
      `contentsChanged` in interface `ListDataListener`
    Parameters:
      `e` - ListDataEvent

  - ### getAccessibleStateSet

    public AccessibleStateSet getAccessibleStateSet()
    Get the state set of this object.
    Overrides:
      `getAccessibleStateSet` in class `JComponent.AccessibleJComponent`
    Returns:
      an instance of AccessibleState containing the current state of the object
    See Also:
      - `AccessibleState`

  - ### getAccessibleRole

    public AccessibleRole getAccessibleRole()
    Get the role of this object.
    Overrides:
      `getAccessibleRole` in class `JComponent.AccessibleJComponent`
    Returns:
      an instance of AccessibleRole describing the role of the object
    See Also:
      - `AccessibleRole`

  - ### getAccessibleAt

    public Accessible getAccessibleAt(Point p)
    Returns the `Accessible` child contained at the local coordinate `Point`, if one exists. Otherwise returns `null`.
    Specified by:
      `getAccessibleAt` in interface `AccessibleComponent`
    Overrides:
      `getAccessibleAt` in class `Container.AccessibleAWTContainer`
    Parameters:
      `p` - the point defining the top-left corner of the `Accessible`, given in the coordinate space of the object's parent
    Returns:
      the `Accessible` at the specified location, if it exists

  - ### getAccessibleChildrenCount

    public int getAccessibleChildrenCount()
    Returns the number of accessible children in the object. If all of the children of this object implement Accessible, than this method should return the number of children of this object.
    Overrides:
      `getAccessibleChildrenCount` in class `JComponent.AccessibleJComponent`
    Returns:
      the number of accessible children in the object.

  - ### getAccessibleChild

    public Accessible getAccessibleChild(int i)
    Return the nth Accessible child of the object.
    Overrides:
      `getAccessibleChild` in class `JComponent.AccessibleJComponent`
    Parameters:
      `i` - zero-based index of child
    Returns:
      the nth Accessible child of the object
    See Also:
      - `AccessibleContext.getAccessibleChildrenCount()`

  - ### getAccessibleSelection

    public AccessibleSelection getAccessibleSelection()
    Get the AccessibleSelection associated with this object. In the implementation of the Java Accessibility API for this class, return this object, which is responsible for implementing the AccessibleSelection interface on behalf of itself.
    Overrides:
      `getAccessibleSelection` in class `AccessibleContext`
    Returns:
      this object
    See Also:
      - `AccessibleSelection`

  - ### getAccessibleSelectionCount

    public int getAccessibleSelectionCount()
    Returns the number of items currently selected. If no items are selected, the return value will be 0.
    Specified by:
      `getAccessibleSelectionCount` in interface `AccessibleSelection`
    Returns:
      the number of items currently selected.

  - ### getAccessibleSelection

    public Accessible getAccessibleSelection(int i)
    Returns an Accessible representing the specified selected item in the object. If there isn't a selection, or there are fewer items selected than the integer passed in, the return value will be `null`.
    Specified by:
      `getAccessibleSelection` in interface `AccessibleSelection`
    Parameters:
      `i` - the zero-based index of selected items
    Returns:
      an Accessible containing the selected item
    See Also:
      - `AccessibleSelection.getAccessibleSelectionCount()`

  - ### isAccessibleChildSelected

    public boolean isAccessibleChildSelected(int i)
    Returns true if the current child of this object is selected.
    Specified by:
      `isAccessibleChildSelected` in interface `AccessibleSelection`
    Parameters:
      `i` - the zero-based index of the child in this Accessible object.
    Returns:
      `true` if the current child of this object is selected; else `false`
    See Also:
      - `AccessibleContext.getAccessibleChild(int)`

  - ### addAccessibleSelection

    public void addAccessibleSelection(int i)
    Adds the specified selected item in the object to the object's selection. If the object supports multiple selections, the specified item is added to any existing selection, otherwise it replaces any existing selection in the object. If the specified item is already selected, this method has no effect.
    Specified by:
      `addAccessibleSelection` in interface `AccessibleSelection`
    Parameters:
      `i` - the zero-based index of selectable items
    See Also:
      - `AccessibleContext.getAccessibleChild(int)`

  - ### removeAccessibleSelection

    public void removeAccessibleSelection(int i)
    Removes the specified selected item in the object from the object's selection. If the specified item isn't currently selected, this method has no effect.
    Specified by:
      `removeAccessibleSelection` in interface `AccessibleSelection`
    Parameters:
      `i` - the zero-based index of selectable items
    See Also:
      - `AccessibleContext.getAccessibleChild(int)`

  - ### clearAccessibleSelection

    public void clearAccessibleSelection()
    Clears the selection in the object, so that nothing in the object is selected.
    Specified by:
      `clearAccessibleSelection` in interface `AccessibleSelection`

  - ### selectAllAccessibleSelection

    public void selectAllAccessibleSelection()
    Causes every selected item in the object to be selected if the object supports multiple selections.
    Specified by:
      `selectAllAccessibleSelection` in interface `AccessibleSelection`