com.zfqjava.swing
Class JLineBar

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--javax.swing.JComponent
                    |
                    +--com.zfqjava.swing.JLineBar

All Implemented Interfaces:

javax.accessibility.Accessible, java.awt.image.ImageObserver, java.awt.MenuContainer, javax.swing.Scrollable, java.io.Serializable

public class JLineBar

extends javax.swing.JComponent

implements javax.accessibility.Accessible, javax.swing.Scrollable

JLineBar provides a bar represents the line number of the text component.

Client Property:

Name	Value	Default Value
JLineBar.showArrowIcon	Boolean.TRUE Boolean.FALSEn	Boolean.FALSE
JLineBar.showLineNumber	Boolean.TRUE Boolean.FALSEn	Boolean.TRUE

See Also:

Serialized Form

Inner Class Summary

protected class

JLineBar.AccessibleJLineBar This class implements accessibility support for the JLineBar class.

Inner classes inherited from class javax.swing.JComponent

javax.swing.JComponent.AccessibleJComponent

Inner classes inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Inner classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent

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

JLineBar()
Constructs a JLineBar.

JLineBar(int lineCount)
Constructs a JLineBar with a specified line count.

JLineBar(int lineCount, javax.swing.ListSelectionModel selectionModel)
Constructs a JLineBar with a selection model and a specified line count.

JLineBar(javax.swing.ListSelectionModel selectionModel)
Constructs a JLineBar with a selection model.

Method Summary

void	addListSelectionListener(javax.swing.event.ListSelectionListener listener) Adds a listener to the list that's notified each time a change to the selection occurs.
protected javax.swing.ListSelectionModel	createSelectionModel() Returns an instance of DefaultListSelectionModel.
protected void	fireSelectionValueChanged(int firstIndex, int lastIndex, boolean isAdjusting) Notifies JLineBar ListSelectionListeners that the selection model has changed.
javax.accessibility.AccessibleContext	getAccessibleContext() Gets the AccessibleContext associated with this JLineBar.
int	getFirstLineIndex() Returns the first line index, the default is 0.
java.awt.Component	getForComponent() Returns the component that the JLineBar attach.
java.awt.Rectangle	getHeaderRect(int line) Returns the rectangle containing the header tile at line.
javax.swing.Icon	getIconAt(int lineno) Returns the icon at the specify line.
int	getLineCount() Gets the current line count number.
int	getLineHeight() Returns the line height.
int	getLineHeight(int lineno) Returns the line height for the specified line number
int	getLineWidth() Returns the line width.
javax.swing.event.ListSelectionListener[]	getListSelectionListeners() Returns an array of all the ListSelectionListeners added to this JLineBar with addListSelectionListener().
java.awt.Dimension	getPreferredScrollableViewportSize() Returns the preferred size of the viewport for a view component.
boolean	getResizingAllowed() Returns true if the user is allowed to resize rows by dragging between their headers, false otherwise.
int	getResizingLine() Returns the resizing line.
int	getScrollableBlockIncrement(java.awt.Rectangle visibleRect, int orientation, int direction) Components that display logical rows or columns should compute the scroll increment that will completely expose one block of rows or columns, depending on the value of orientation.
boolean	getScrollableTracksViewportHeight() Return true if a viewport should always force the height of this Scrollable to match the height of the viewport.
boolean	getScrollableTracksViewportWidth() Return true if a viewport should always force the width of this Scrollable to match the width of the viewport.
int	getScrollableUnitIncrement(java.awt.Rectangle visibleRect, int orientation, int direction) Components that display logical rows or columns should compute the scroll increment that will completely expose one new row or column, depending on the value of orientation.
int	getSelectedLine() Returns the selected line number.
int[]	getSelectedLines() Returns the selected lines number array.
int	getSelectionMode() Returns whether single-item or multiple-item selections are allowed.
javax.swing.ListSelectionModel	getSelectionModel() Returns the value of the current selection model.
LineBarUI	getUI() Returns the look and feel (L&F) object that renders this component.
java.lang.String	getUIClassID() Returns a string that specifies the name of the L&F class that renders this component.
boolean	isFixedLineHeight() Determines the JLineBar has a fixed line height.
protected java.lang.String	paramString() Returns a string representation of this JLineBar.
void	removeListSelectionListener(javax.swing.event.ListSelectionListener listener) Removes a listener from the list that's notified each time a change to the selection occurs.
void	revalidate()
void	setFirstLineIndex(int firstLineIndex) Sets the first line index, the default is 0.
void	setForComponent(java.awt.Component c) Sets the component that the JLineBar attach.
void	setIconAt(javax.swing.Icon icon, int lineno) Sets the icon at the specify line.
void	setLineCount(int lineCount) Sets the current line count number.
void	setLineHeight(int lineHeight) Sets the line height.
void	setLineHeight(int lineno, int lineHeight) Sets the line height for the specified line number.
void	setLineWidth(int lineWidth) Sets the line width.
void	setResizingAllowed(boolean resizingAllowed) Sets whether the user can resize rows by dragging between headers.
void	setResizingLine(int line) Sets the resizing line.
void	setSelectedLine(int lineno) Sets the selected line number.
void	setSelectedLines(int[] lines) Sets the selected lines number array.
void	setSelectionMode(int selectionMode) Determines whether single-item or multiple-item selections are allowed.
void	setSelectionModel(javax.swing.ListSelectionModel selectionModel) Sets the selectionModel for the list to a non-null ListSelectionModel implementation.
void	setUI(LineBarUI ui) Sets the look and feel (L&F) object that renders this component.
void	updateUI() Resets the UI property with a value from the current look and feel.

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getDebugGraphicsOptions, getGraphics, getHeight, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getVerifyInputWhenFocusTarget, getVisibleRect, getWidth, getX, getY, grabFocus, hasFocus, hide, isDoubleBuffered, isFocusCycleRoot, isFocusTraversable, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processFocusEvent, processKeyBinding, processKeyEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, resetKeyboardActions, reshape, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setDebugGraphicsOptions, setDoubleBuffered, setEnabled, setFont, setForeground, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getLayout, insets, invalidate, isAncestorOf, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setLayout, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getInputContext, getInputMethodRequests, getLocale, getLocation, getLocationOnScreen, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, imageUpdate, inside, isDisplayable, isEnabled, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus

Methods inherited from class java.lang.Object

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

Constructor Detail

JLineBar

public JLineBar()

Constructs a JLineBar.

See Also:

JLineBar()

JLineBar

public JLineBar(int lineCount)

Constructs a JLineBar with a specified line count.

Parameters:

lineCount - a specified line count

See Also:

JLineBar()

JLineBar

public JLineBar(javax.swing.ListSelectionModel selectionModel)

Constructs a JLineBar with a selection model.

Parameters:

selectionModel - a selection model

See Also:

JLineBar()

JLineBar

public JLineBar(int lineCount,
                javax.swing.ListSelectionModel selectionModel)

Constructs a JLineBar with a selection model and a specified line count.

Parameters:

lineCount - a specified line count

selectionModel - a selection model

See Also:

JLineBar()

Method Detail

updateUI

public void updateUI()

Resets the UI property with a value from the current look and feel.

Overrides:

updateUI in class javax.swing.JComponent

See Also:

JComponent.updateUI()

getUI

public LineBarUI getUI()

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

Returns:

the LineBarUI object that renders this component

setUI

public void setUI(LineBarUI ui)

Sets the look and feel (L&F) object that renders this component.

Parameters:

ui - the LineBarUI L&F object

See Also:

UIDefaults.getUI(javax.swing.JComponent)

getUIClassID

public java.lang.String getUIClassID()

Returns a string that specifies the name of the L&F class that renders this component.

Overrides:

getUIClassID in class javax.swing.JComponent

Returns:

"LineBarUI"

See Also:

JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)

createSelectionModel

protected javax.swing.ListSelectionModel createSelectionModel()

Returns an instance of DefaultListSelectionModel. This method is used by the constructor to initialize the selectionModel property.

Returns:

the ListSelectionModel used by this JList.

See Also:

setSelectionModel(javax.swing.ListSelectionModel), DefaultListSelectionModel

getSelectionModel

public javax.swing.ListSelectionModel getSelectionModel()

Returns the value of the current selection model. The selection model handles the task of making single selections, selections of contiguous ranges, and non-contiguous selections.

Returns:

the ListSelectionModel that implements list selections

See Also:

setSelectionModel(javax.swing.ListSelectionModel), ListSelectionModel

setSelectionModel

public void setSelectionModel(javax.swing.ListSelectionModel selectionModel)

Sets the selectionModel for the list to a non-null ListSelectionModel implementation. The selection model handles the task of making single selections, selections of contiguous ranges, and non-contiguous selections.

This is a JavaBeans bound property.

Parameters:

selectionModel - the ListSelectionModel that implements the selections

Throws:

java.lang.IllegalArgumentException - if selectionModel is null

See Also:

getSelectionModel()

setSelectionMode

public void setSelectionMode(int selectionMode)

Determines whether single-item or multiple-item selections are allowed. The following selectionMode values are allowed:

• ListSelectionModel.SINGLE_SELECTION Only one list index can be selected at a time. In this mode the setSelectionInterval and addSelectionInterval methods are equivalent, and only the second index argument is used.
• ListSelectionModel.SINGLE_INTERVAL_SELECTION One contiguous index interval can be selected at a time. In this mode setSelectionInterval and addSelectionInterval are equivalent.
• ListSelectionModel.MULTIPLE_INTERVAL_SELECTION In this mode, there's no restriction on what can be selected. This is the default.

Parameters:

selectionMode - an integer specifying the type of selections that are permissible

See Also:

getSelectionMode()

getSelectionMode

public int getSelectionMode()

Returns whether single-item or multiple-item selections are allowed.

Returns:

the value of the selectionMode property

See Also:

setSelectionMode(int)

setResizingAllowed

public void setResizingAllowed(boolean resizingAllowed)

Sets whether the user can resize rows by dragging between headers.

Parameters:

resizingAllowed - true if table view should allow resizing

Since:

JDataGrid 1.1

See Also:

getResizingAllowed()

getResizingAllowed

public boolean getResizingAllowed()

Returns true if the user is allowed to resize rows by dragging between their headers, false otherwise. The default is true. You can resize rows programmatically regardless of this setting.

Returns:

the resizingAllowed property

Since:

JDataGrid 1.1

See Also:

setResizingAllowed(boolean)

setResizingLine

public void setResizingLine(int line)

Sets the resizing line.

Parameters:

line - the line being resizing

Since:

JDataGrid 1.1

See Also:

getResizingLine()

getResizingLine

public int getResizingLine()

Returns the resizing line.

Returns:

the resizing line

Since:

JDataGrid 1.1

See Also:

setResizingLine(int)

setForComponent

public void setForComponent(java.awt.Component c)

Sets the component that the JLineBar attach.

Parameters:

c - the component to attach

Since:

JDataGrid 1.1

See Also:

getForComponent()

getForComponent

public java.awt.Component getForComponent()

Returns the component that the JLineBar attach.

Returns:

the component to attach

Since:

JDataGrid 1.1

See Also:

setForComponent(java.awt.Component)

setFirstLineIndex

public void setFirstLineIndex(int firstLineIndex)

Sets the first line index, the default is 0.

Parameters:

firstLineIndex - the first line index

Since:

JDataTable 1.0

See Also:

getFirstLineIndex()

getFirstLineIndex

public int getFirstLineIndex()

Returns the first line index, the default is 0.

Returns:

the first line index

Since:

JDataTable 1.0

See Also:

setFirstLineIndex(int)

getSelectedLine

public int getSelectedLine()

Returns the selected line number.

Returns:

the selected line number

See Also:

setSelectedLine(int)

setSelectedLine

public void setSelectedLine(int lineno)

Sets the selected line number.

Parameters:

lineno - the line number to select

See Also:

getSelectedLine()

getSelectedLines

public int[] getSelectedLines()

Returns the selected lines number array.

Returns:

the selected lines number array

See Also:

setSelectedLines(int[])

setSelectedLines

public void setSelectedLines(int[] lines)

Sets the selected lines number array.

Parameters:

lines - the lines number array to select

See Also:

getSelectedLines()

getLineCount

public int getLineCount()

Gets the current line count number.

Returns:

the current line count number

See Also:

setLineCount(int)

setLineCount

public void setLineCount(int lineCount)

Sets the current line count number.

Parameters:

count - the line count to select

See Also:

getLineCount()

setLineHeight

public void setLineHeight(int lineHeight)

Sets the line height.

Parameters:

lineHeight - the line height

See Also:

getLineHeight()

getLineHeight

public int getLineHeight()

Returns the line height.

See Also:

setLineHeight(int)

setLineHeight

public void setLineHeight(int lineno,
                          int lineHeight)

Sets the line height for the specified line number.

Parameters:

lineno - the specified line number

lineHeight - the line height

See Also:

setLineHeight(int), getLineHeight(int), getLineHeight()

getLineHeight

public int getLineHeight(int lineno)

Returns the line height for the specified line number

Parameters:

lineno - the specified line number

See Also:

setLineHeight(int,int), setLineHeight(int), setLineHeight(int)

revalidate

public void revalidate()

Overrides:

revalidate in class javax.swing.JComponent

isFixedLineHeight

public boolean isFixedLineHeight()

Determines the JLineBar has a fixed line height.

Returns:

true if the JLineBar has a fixed line height, false otherwise

setLineWidth

public void setLineWidth(int lineWidth)

Sets the line width.

Parameters:

lineWidth - the line width

See Also:

getLineWidth()

getLineWidth

public int getLineWidth()

Returns the line width.

See Also:

setLineWidth(int)

getHeaderRect

public java.awt.Rectangle getHeaderRect(int line)

Returns the rectangle containing the header tile at line. When the line parameter is out of bounds this method uses the same conventions as the JTable method getCellRect.

Returns:

the rectangle containing the header tile at line

See Also:

JTable.getCellRect(int, int, boolean)

setIconAt

public void setIconAt(javax.swing.Icon icon,
                      int lineno)

Sets the icon at the specify line.

Parameters:

icon - the icon to set at the line bar

lineno - the line number that the icon to set

See Also:

getIconAt(int)

getIconAt

public javax.swing.Icon getIconAt(int lineno)

Returns the icon at the specify line.

Parameters:

lineno - the line number that the icon to set

Returns:

the icon at the specify line

See Also:

setIconAt(javax.swing.Icon, int)

fireSelectionValueChanged

protected void fireSelectionValueChanged(int firstIndex,
                                         int lastIndex,
                                         boolean isAdjusting)

Notifies JLineBar ListSelectionListeners that the selection model has changed. It's used to forward ListSelectionEvents from the selectionModel to the ListSelectionListeners added directly to the JLineBar.

Parameters:

firstIndex - the first selected index

lastIndex - the last selected index

isAdjusting - true if multiple changes are being made

See Also:

addListSelectionListener(javax.swing.event.ListSelectionListener), removeListSelectionListener(javax.swing.event.ListSelectionListener), EventListenerList

addListSelectionListener

public void addListSelectionListener(javax.swing.event.ListSelectionListener listener)

Adds a listener to the list that's notified each time a change to the selection occurs. Listeners added directly to the JLineBar will have their ListSelectionEvent.getSource() == this JLineBar (instead of the ListSelectionModel).

Parameters:

listener - the ListSelectionListener to add

See Also:

getSelectionModel(), getListSelectionListeners()

removeListSelectionListener

public void removeListSelectionListener(javax.swing.event.ListSelectionListener listener)

Removes a listener from the list that's notified each time a change to the selection occurs.

Parameters:

listener - the ListSelectionListener to remove

See Also:

addListSelectionListener(javax.swing.event.ListSelectionListener), getSelectionModel()

getListSelectionListeners

public javax.swing.event.ListSelectionListener[] getListSelectionListeners()

Returns an array of all the ListSelectionListeners added to this JLineBar with addListSelectionListener().

Returns:

all of the ListSelectionListeners added or an empty array if no listeners have been added

See Also:

addListSelectionListener(javax.swing.event.ListSelectionListener)

getPreferredScrollableViewportSize

public java.awt.Dimension getPreferredScrollableViewportSize()

Returns the preferred size of the viewport for a view component. For example the preferredSize of a JLineBar component is the size required to accommodate all of the cells in its list however the value of preferredScrollableViewportSize is the size required for JLineBar.getVisibleRowCount() rows. A component without any properties that would effect the viewport size should just return getPreferredSize() here.

Specified by:

getPreferredScrollableViewportSize in interface javax.swing.Scrollable

Returns:

The preferredSize of a JViewport whose view is this Scrollable.

See Also:

JComponent.getPreferredSize()

getScrollableUnitIncrement

public int getScrollableUnitIncrement(java.awt.Rectangle visibleRect,
                                      int orientation,
                                      int direction)

Components that display logical rows or columns should compute the scroll increment that will completely expose one new row or column, depending on the value of orientation. Ideally, components should handle a partially exposed row or column by returning the distance required to completely expose the item.

Scrolling containers, like JScrollPane, will use this method each time the user requests a unit scroll.

Specified by:

getScrollableUnitIncrement in interface javax.swing.Scrollable

Parameters:

visibleRect - The view area visible within the viewport

orientation - Either SwingConstants.VERTICAL or SwingConstants.HORIZONTAL.

direction - Less than zero to scroll up/left, greater than zero for down/right.

Returns:

The "unit" increment for scrolling in the specified direction. This value should always be positive.

See Also:

JScrollBar.setUnitIncrement(int)

getScrollableBlockIncrement

public int getScrollableBlockIncrement(java.awt.Rectangle visibleRect,
                                       int orientation,
                                       int direction)

Components that display logical rows or columns should compute the scroll increment that will completely expose one block of rows or columns, depending on the value of orientation.

Scrolling containers, like JScrollPane, will use this method each time the user requests a block scroll.

Specified by:

getScrollableBlockIncrement in interface javax.swing.Scrollable

Parameters:

visibleRect - The view area visible within the viewport

orientation - Either SwingConstants.VERTICAL or SwingConstants.HORIZONTAL.

direction - Less than zero to scroll up/left, greater than zero for down/right.

Returns:

The "block" increment for scrolling in the specified direction. This value should always be positive.

See Also:

JScrollBar.setBlockIncrement(int)

getScrollableTracksViewportWidth

public boolean getScrollableTracksViewportWidth()

Return true if a viewport should always force the width of this Scrollable to match the width of the viewport. For example a normal text view that supported line wrapping would return true here, since it would be undesirable for wrapped lines to disappear beyond the right edge of the viewport. Note that returning true for a Scrollable whose ancestor is a JScrollPane effectively disables horizontal scrolling.

Scrolling containers, like JViewport, will use this method each time they are validated.

Specified by:

getScrollableTracksViewportWidth in interface javax.swing.Scrollable

Returns:

True if a viewport should force the Scrollables width to match its own.

getScrollableTracksViewportHeight

public boolean getScrollableTracksViewportHeight()

Return true if a viewport should always force the height of this Scrollable to match the height of the viewport. For example a columnar text view that flowed text in left to right columns could effectively disable vertical scrolling by returning true here.

Scrolling containers, like JViewport, will use this method each time they are validated.

Specified by:

getScrollableTracksViewportHeight in interface javax.swing.Scrollable

Returns:

True if a viewport should force the Scrollables height to match its own.

paramString

protected java.lang.String paramString()

Returns a string representation of this JLineBar. 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 javax.swing.JComponent

Returns:

a string representation of this JLineBar.

getAccessibleContext

public javax.accessibility.AccessibleContext getAccessibleContext()

Gets the AccessibleContext associated with this JLineBar. For JLineBars, the AccessibleContext takes the form of an AccessibleJLineBar. A new AccessibleJLineBar instance is created if necessary.

Specified by:

getAccessibleContext in interface javax.accessibility.Accessible

Overrides:

getAccessibleContext in class javax.swing.JComponent

Returns:

an AccessibleJLineBar that serves as the AccessibleContext of this JLineBar