javax.swing

## Class JScrollBar

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

All Implemented Interfaces:
  Adjustable, ImageObserver, MenuContainer, Serializable, Accessible

Direct Known Subclasses:
  JScrollPane.ScrollBar

    public class JScrollBar
    extends JComponent
    implements Adjustable, Accessible

An implementation of a scrollbar. The user positions the knob in the scrollbar to determine the contents of the viewing area. The program typically adjusts the display so that the end of the scrollbar represents the end of the displayable contents, or 100% of the contents. The start of the scrollbar is the beginning of the displayable contents, or 0%. The position of the knob within those bounds then translates to the corresponding percentage of the displayable contents.

Typically, as the position of the knob in the scrollbar changes a corresponding change is made to the position of the JViewport on the underlying view, changing the contents of the JViewport.

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`.

See Also:
  `JScrollPane`

### Nested Class Summary

Nested Classes
`protected class` `JScrollBar.AccessibleJScrollBar` This class implements accessibility support for the `JScrollBar` class.

### 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
`protected int` `blockIncrement`
`protected BoundedRangeModel` `model` The model that represents the scrollbar's minimum, maximum, extent (aka "visibleAmount") and current value.
`protected int` `orientation`
`protected int` `unitIncrement`

### 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.Adjustable

`HORIZONTAL, NO_ORIENTATION, VERTICAL`

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

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

### Constructor Summary

Constructors
Constructor and Description
`JScrollBar()` Creates a vertical scrollbar with the following initial values:
`JScrollBar(int orientation)` Creates a scrollbar with the specified orientation and the following initial values:
`JScrollBar(int orientation, int value, int extent, int min, int max)` Creates a scrollbar with the specified orientation, value, extent, minimum, and maximum.

### Method Summary

Methods
`void` `addAdjustmentListener(AdjustmentListener l)` Adds an AdjustmentListener.
`protected void` `fireAdjustmentValueChanged(int id, int type, int value)` Notify listeners that the scrollbar's model has changed.
`AccessibleContext` `getAccessibleContext()` Gets the AccessibleContext associated with this JScrollBar.
`AdjustmentListener[]` `getAdjustmentListeners()` Returns an array of all the `AdjustmentListener`s added to this JScrollBar with addAdjustmentListener().
`int` `getBlockIncrement()` For backwards compatibility with java.awt.Scrollbar.
`int` `getBlockIncrement(int direction)` Returns the amount to change the scrollbar's value by, given a block (usually "page") up/down request.
`int` `getMaximum()` The maximum value of the scrollbar is maximum - extent.
`Dimension` `getMaximumSize()` The scrollbar is flexible along it's scrolling axis and rigid along the other axis.
`int` `getMinimum()` Returns the minimum value supported by the scrollbar (usually zero).
`Dimension` `getMinimumSize()` The scrollbar is flexible along it's scrolling axis and rigid along the other axis.
`BoundedRangeModel` `getModel()` Returns data model that handles the scrollbar's four fundamental properties: minimum, maximum, value, extent.
`int` `getOrientation()` Returns the component's orientation (horizontal or vertical).
`ScrollBarUI` `getUI()` Returns the delegate that implements the look and feel for this component.
`String` `getUIClassID()` Returns the name of the LookAndFeel class for this component.
`int` `getUnitIncrement()` For backwards compatibility with java.awt.Scrollbar.
`int` `getUnitIncrement(int direction)` Returns the amount to change the scrollbar's value by, given a unit up/down request.
`int` `getValue()` Returns the scrollbar's value.
`boolean` `getValueIsAdjusting()` True if the scrollbar knob is being dragged.
`int` `getVisibleAmount()` Returns the scrollbar's extent, aka its "visibleAmount".
`protected String` `paramString()` Returns a string representation of this JScrollBar.
`void` `removeAdjustmentListener(AdjustmentListener l)` Removes an AdjustmentEvent listener.
`void` `setBlockIncrement(int blockIncrement)` Sets the blockIncrement property.
`void` `setEnabled(boolean x)` Enables the component so that the knob position can be changed.
`void` `setMaximum(int maximum)` Sets the model's maximum property.
`void` `setMinimum(int minimum)` Sets the model's minimum property.
`void` `setModel(BoundedRangeModel newModel)` Sets the model that handles the scrollbar's four fundamental properties: minimum, maximum, value, extent.
`void` `setOrientation(int orientation)` Set the scrollbar's orientation to either VERTICAL or HORIZONTAL.
`void` `setUI(ScrollBarUI ui)` Sets the L&F object that renders this component.
`void` `setUnitIncrement(int unitIncrement)` Sets the unitIncrement property.
`void` `setValue(int value)` Sets the scrollbar's value.
`void` `setValueIsAdjusting(boolean b)` Sets the model's valueIsAdjusting property.
`void` `setValues(int newValue, int newExtent, int newMin, int newMax)` Sets the four BoundedRangeModel properties after forcing the arguments to obey the usual constraints:
`void` `setVisibleAmount(int extent)` Set the model's extent property.
`void` `updateUI()` Overrides `JComponent.updateUI`.

### 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, 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, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, 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, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update`

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

`add, add, add, add, add, addContainerListener, 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, 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, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle`

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

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

### Field Detail

#### model

    protected BoundedRangeModel model

The model that represents the scrollbar's minimum, maximum, extent (aka "visibleAmount") and current value.

See Also:
  `setModel(javax.swing.BoundedRangeModel)`

#### orientation

    protected int orientation

See Also:
  `setOrientation(int)`

#### unitIncrement

    protected int unitIncrement

See Also:
  `setUnitIncrement(int)`

#### blockIncrement

    protected int blockIncrement

See Also:
  `setBlockIncrement(int)`

### Constructor Detail

#### JScrollBar

    public JScrollBar(int orientation,
              int value,
              int extent,
              int min,
              int max)

Creates a scrollbar with the specified orientation, value, extent, minimum, and maximum. The "extent" is the size of the viewable area. It is also known as the "visible amount".

Note: Use `setBlockIncrement` to set the block increment to a size slightly smaller than the view's extent. That way, when the user jumps the knob to an adjacent position, one or two lines of the original contents remain in view.

Throws:
  `IllegalArgumentException` - if orientation is not one of VERTICAL, HORIZONTAL
See Also:
  `setOrientation(int)`, `setValue(int)`, `setVisibleAmount(int)`, `setMinimum(int)`, `setMaximum(int)`

#### JScrollBar

    public JScrollBar(int orientation)

Creates a scrollbar with the specified orientation and the following initial values:

     minimum = 0
     maximum = 100
     value = 0
     extent = 10

#### JScrollBar

    public JScrollBar()

Creates a vertical scrollbar with the following initial values:

     minimum = 0
     maximum = 100
     value = 0
     extent = 10

### Method Detail

#### setUI

    public void setUI(ScrollBarUI ui)

Sets the L&F object that renders this component.

Parameters:
  `ui` - the `ScrollBarUI` L&F object
Since:
  1.4
See Also:
  `UIDefaults.getUI(javax.swing.JComponent)`

#### getUI

    public ScrollBarUI getUI()

Returns the delegate that implements the look and feel for this component.

See Also:
  `JComponent.setUI(javax.swing.plaf.ComponentUI)`

#### updateUI

    public void updateUI()

Overrides `JComponent.updateUI`.

Overrides:
  `updateUI` in class `JComponent`
See Also:
  `JComponent.updateUI()`

#### getUIClassID

    public String getUIClassID()

Returns the name of the LookAndFeel class for this component.

Overrides:
  `getUIClassID` in class `JComponent`
Returns:
  "ScrollBarUI"
See Also:
  `JComponent.getUIClassID()`, `UIDefaults.getUI(javax.swing.JComponent)`

#### getOrientation

    public int getOrientation()

Returns the component's orientation (horizontal or vertical).

Specified by:
  `getOrientation` in interface `Adjustable`
Returns:
  VERTICAL or HORIZONTAL
See Also:
  `setOrientation(int)`, `Adjustable.getOrientation()`

#### setOrientation

    public void setOrientation(int orientation)

Set the scrollbar's orientation to either VERTICAL or HORIZONTAL.

Throws:
  `IllegalArgumentException` - if orientation is not one of VERTICAL, HORIZONTAL
See Also:
  `getOrientation()`

#### getModel

    public BoundedRangeModel getModel()

Returns data model that handles the scrollbar's four fundamental properties: minimum, maximum, value, extent.

See Also:
  `setModel(javax.swing.BoundedRangeModel)`

#### setModel

    public void setModel(BoundedRangeModel newModel)

Sets the model that handles the scrollbar's four fundamental properties: minimum, maximum, value, extent.

See Also:
  `getModel()`

#### getUnitIncrement

    public int getUnitIncrement(int direction)

Returns the amount to change the scrollbar's value by, given a unit up/down request. A ScrollBarUI implementation typically calls this method when the user clicks on a scrollbar up/down arrow and uses the result to update the scrollbar's value. Subclasses my override this method to compute a value, e.g. the change required to scroll up or down one (variable height) line text or one row in a table.

The JScrollPane component creates scrollbars (by default) that override this method and delegate to the viewports Scrollable view, if it has one. The Scrollable interface provides a more specialized version of this method.

Parameters:
  `direction` - is -1 or 1 for up/down respectively
Returns:
  the value of the unitIncrement property
See Also:
  `setUnitIncrement(int)`, `setValue(int)`, `Scrollable.getScrollableUnitIncrement(java.awt.Rectangle, int, int)`

#### setUnitIncrement

    public void setUnitIncrement(int unitIncrement)

Sets the unitIncrement property.

Note, that if the argument is equal to the value of Integer.MIN_VALUE, the most look and feels will not provide the scrolling to the right/down.

Specified by:
  `setUnitIncrement` in interface `Adjustable`
Parameters:
  `unitIncrement` - the unit increment
See Also:
  `getUnitIncrement(int)`

#### getBlockIncrement

    public int getBlockIncrement(int direction)

Returns the amount to change the scrollbar's value by, given a block (usually "page") up/down request. A ScrollBarUI implementation typically calls this method when the user clicks above or below the scrollbar "knob" to change the value up or down by large amount. Subclasses my override this method to compute a value, e.g. the change required to scroll up or down one paragraph in a text document.

The JScrollPane component creates scrollbars (by default) that override this method and delegate to the viewports Scrollable view, if it has one. The Scrollable interface provides a more specialized version of this method.

Parameters:
  `direction` - is -1 or 1 for up/down respectively
Returns:
  the value of the blockIncrement property
See Also:
  `setBlockIncrement(int)`, `setValue(int)`, `Scrollable.getScrollableBlockIncrement(java.awt.Rectangle, int, int)`

#### setBlockIncrement

    public void setBlockIncrement(int blockIncrement)

Sets the blockIncrement property.

Note, that if the argument is equal to the value of Integer.MIN_VALUE, the most look and feels will not provide the scrolling to the right/down.

Specified by:
  `setBlockIncrement` in interface `Adjustable`
Parameters:
  `blockIncrement` - the block increment
See Also:
  `getBlockIncrement()`

#### getUnitIncrement

    public int getUnitIncrement()

For backwards compatibility with java.awt.Scrollbar.

Specified by:
  `getUnitIncrement` in interface `Adjustable`
Returns:
  the unit value increment for the adjustable object
See Also:
  `Adjustable.getUnitIncrement()`, `getUnitIncrement(int)`

#### getBlockIncrement

    public int getBlockIncrement()

For backwards compatibility with java.awt.Scrollbar.

Specified by:
  `getBlockIncrement` in interface `Adjustable`
Returns:
  the block value increment for the adjustable object
See Also:
  `Adjustable.getBlockIncrement()`, `getBlockIncrement(int)`

#### getValue

    public int getValue()

Returns the scrollbar's value.

Specified by:
  `getValue` in interface `Adjustable`
Returns:
  the model's value property
See Also:
  `setValue(int)`

#### setValue

    public void setValue(int value)

Sets the scrollbar's value. This method just forwards the value to the model.

Specified by:
  `setValue` in interface `Adjustable`
Parameters:
  `value` - the current value, between `minimum` and `maximum` - `visibleAmount`
See Also:
  `getValue()`, `BoundedRangeModel.setValue(int)`

#### getVisibleAmount

    public int getVisibleAmount()

Returns the scrollbar's extent, aka its "visibleAmount". In many scrollbar look and feel implementations the size of the scrollbar "knob" or "thumb" is proportional to the extent.

Specified by:
  `getVisibleAmount` in interface `Adjustable`
Returns:
  the value of the model's extent property
See Also:
  `setVisibleAmount(int)`

#### setVisibleAmount

    public void setVisibleAmount(int extent)

Set the model's extent property.

Specified by:
  `setVisibleAmount` in interface `Adjustable`
Parameters:
  `extent` - the length of the indicator
See Also:
  `getVisibleAmount()`, `BoundedRangeModel.setExtent(int)`

#### getMinimum

    public int getMinimum()

Returns the minimum value supported by the scrollbar (usually zero).

Specified by:
  `getMinimum` in interface `Adjustable`
Returns:
  the value of the model's minimum property
See Also:
  `setMinimum(int)`

#### setMinimum

    public void setMinimum(int minimum)

Sets the model's minimum property.

Specified by:
  `setMinimum` in interface `Adjustable`
Parameters:
  `minimum` - the minimum value
See Also:
  `getMinimum()`, `BoundedRangeModel.setMinimum(int)`

#### getMaximum

    public int getMaximum()

The maximum value of the scrollbar is maximum - extent.

Specified by:
  `getMaximum` in interface `Adjustable`
Returns:
  the value of the model's maximum property
See Also:
  `setMaximum(int)`

#### setMaximum

    public void setMaximum(int maximum)

Sets the model's maximum property. Note that the scrollbar's value can only be set to maximum - extent.

Specified by:
  `setMaximum` in interface `Adjustable`
Parameters:
  `maximum` - the maximum value
See Also:
  `getMaximum()`, `BoundedRangeModel.setMaximum(int)`

#### getValueIsAdjusting

    public boolean getValueIsAdjusting()

True if the scrollbar knob is being dragged.

Returns:
  the value of the model's valueIsAdjusting property
See Also:
  `setValueIsAdjusting(boolean)`

#### setValueIsAdjusting

    public void setValueIsAdjusting(boolean b)

Sets the model's valueIsAdjusting property. Scrollbar look and feel implementations should set this property to true when a knob drag begins, and to false when the drag ends. The scrollbar model will not generate ChangeEvents while valueIsAdjusting is true.

See Also:
  `getValueIsAdjusting()`, `BoundedRangeModel.setValueIsAdjusting(boolean)`

#### setValues

    public void setValues(int newValue,
                 int newExtent,
                 int newMin,
                 int newMax)

Sets the four BoundedRangeModel properties after forcing the arguments to obey the usual constraints:

     minimum <= value <= value+extent <= maximum

See Also:
  `BoundedRangeModel.setRangeProperties(int, int, int, int, boolean)`, `setValue(int)`, `setVisibleAmount(int)`, `setMinimum(int)`, `setMaximum(int)`

#### addAdjustmentListener

    public void addAdjustmentListener(AdjustmentListener l)

Adds an AdjustmentListener. Adjustment listeners are notified each time the scrollbar's model changes. Adjustment events are provided for backwards compatibility with java.awt.Scrollbar.

Note that the AdjustmentEvents type property will always have a placeholder value of AdjustmentEvent.TRACK because all changes to a BoundedRangeModels value are considered equivalent. To change the value of a BoundedRangeModel one just sets its value property, i.e. model.setValue(123). No information about the origin of the change, e.g. it's a block decrement, is provided. We don't try fabricate the origin of the change here.

Specified by:
  `addAdjustmentListener` in interface `Adjustable`
Parameters:
  `l` - the AdjustmentLister to add
See Also:
  `removeAdjustmentListener(java.awt.event.AdjustmentListener)`, `BoundedRangeModel.addChangeListener(javax.swing.event.ChangeListener)`

#### removeAdjustmentListener

    public void removeAdjustmentListener(AdjustmentListener l)

Removes an AdjustmentEvent listener.

Specified by:
  `removeAdjustmentListener` in interface `Adjustable`
Parameters:
  `l` - the AdjustmentLister to remove
See Also:
  `addAdjustmentListener(java.awt.event.AdjustmentListener)`

#### getAdjustmentListeners

    public AdjustmentListener[] getAdjustmentListeners()

Returns an array of all the `AdjustmentListener`s added to this JScrollBar with addAdjustmentListener().

Returns:
  all of the `AdjustmentListener`s added or an empty array if no listeners have been added
Since:
  1.4

#### fireAdjustmentValueChanged

    protected void fireAdjustmentValueChanged(int id,
                                  int type,
                                  int value)

Notify listeners that the scrollbar's model has changed.

See Also:
  `addAdjustmentListener(java.awt.event.AdjustmentListener)`, `EventListenerList`

#### getMinimumSize

    public Dimension getMinimumSize()

The scrollbar is flexible along it's scrolling axis and rigid along the other axis.

Overrides:
  `getMinimumSize` in class `JComponent`
Returns:
  the value of the `minimumSize` property
See Also:
  `JComponent.setMinimumSize(java.awt.Dimension)`, `ComponentUI`

#### getMaximumSize

    public Dimension getMaximumSize()

The scrollbar is flexible along it's scrolling axis and rigid along the other axis.

Overrides:
  `getMaximumSize` in class `JComponent`
Returns:
  the value of the `maximumSize` property
See Also:
  `JComponent.setMaximumSize(java.awt.Dimension)`, `ComponentUI`

#### setEnabled

    public void setEnabled(boolean x)

Enables the component so that the knob position can be changed. When the disabled, the knob position cannot be changed.

Overrides:
  `setEnabled` in class `JComponent`
Parameters:
  `x` - a boolean value, where true enables the component and false disables it
See Also:
  `Component.isEnabled()`, `Component.isLightweight()`

#### paramString

    protected String paramString()

Returns a string representation of this JScrollBar. 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 JScrollBar.

#### getAccessibleContext

    public AccessibleContext getAccessibleContext()

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

Specified by:
  `getAccessibleContext` in interface `Accessible`
Overrides:
  `getAccessibleContext` in class `JComponent`
Returns:
  an AccessibleJScrollBar that serves as the AccessibleContext of this JScrollBar

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