javax.swing

## Class JSlider

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

- All Implemented Interfaces:
    ImageObserver, MenuContainer, Serializable, Accessible, SwingConstants

      public class JSlider
      extends JComponent
      implements SwingConstants, Accessible

  A component that lets the user graphically select a value by sliding a knob within a bounded interval. The knob is always positioned at the points that match integer values within the specified interval.

  The slider can show both major tick marks, and minor tick marks between the major ones. The number of values between the tick marks is controlled with `setMajorTickSpacing` and `setMinorTickSpacing`. Painting of tick marks is controlled by `setPaintTicks`.

  Sliders can also print text labels at regular intervals (or at arbitrary locations) along the slider track. Painting of labels is controlled by `setLabelTable` and `setPaintLabels`.

  For further information and examples see How to Use Sliders, a section in The Java Tutorial.

  Warning: Swing is not thread safe. For more information see Swing's Threading Policy.

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

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `protected class` | `JSlider.AccessibleJSlider` This class implements accessibility support for the `JSlider` 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
    Modifier and Type | Field and Description
    --- | ---
    `protected ChangeEvent` | `changeEvent` Only one `ChangeEvent` is needed per slider instance since the event's only (read-only) state is the source property.
    `protected ChangeListener` | `changeListener` The changeListener (no suffix) is the listener we add to the slider's model.
    `protected int` | `majorTickSpacing` The number of values between the major tick marks -- the larger marks that break up the minor tick marks.
    `protected int` | `minorTickSpacing` The number of values between the minor tick marks -- the smaller marks that occur between the major tick marks.
    `protected int` | `orientation` Whether the slider is horizontal or vertical The default is horizontal.
    `protected BoundedRangeModel` | `sliderModel` The data model that handles the numeric maximum value, minimum value, and current-position value for the slider.
    `protected boolean` | `snapToTicks` If true, the knob (and the data value it represents) resolve to the closest tick mark next to where the user positioned the knob.

    - ### 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 javax.swing.SwingConstants

      `BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST`

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

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

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `JSlider()` Creates a horizontal slider with the range 0 to 100 and an initial value of 50.
    `JSlider(BoundedRangeModel brm)` Creates a horizontal slider using the specified BoundedRangeModel.
    `JSlider(int orientation)` Creates a slider using the specified orientation with the range `0` to `100` and an initial value of `50`.
    `JSlider(int min, int max)` Creates a horizontal slider using the specified min and max with an initial value equal to the average of the min plus max.
    `JSlider(int min, int max, int value)` Creates a horizontal slider using the specified min, max and value.
    `JSlider(int orientation, int min, int max, int value)` Creates a slider with the specified orientation and the specified minimum, maximum, and initial values.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addChangeListener(ChangeListener l)` Adds a ChangeListener to the slider.
    `protected ChangeListener` | `createChangeListener()` Subclasses that want to handle `ChangeEvent`s from the model differently can override this to return an instance of a custom `ChangeListener` implementation.
    `Hashtable` | `createStandardLabels(int increment)` Creates a `Hashtable` of numerical text labels, starting at the slider minimum, and using the increment specified.
    `Hashtable` | `createStandardLabels(int increment, int start)` Creates a `Hashtable` of numerical text labels, starting at the starting point specified, and using the increment specified.
    `protected void` | `fireStateChanged()` Send a `ChangeEvent`, whose source is this `JSlider`, to all `ChangeListener`s that have registered interest in `ChangeEvent`s.
    `AccessibleContext` | `getAccessibleContext()` Gets the AccessibleContext associated with this JSlider.
    `ChangeListener[]` | `getChangeListeners()` Returns an array of all the `ChangeListener`s added to this JSlider with addChangeListener().
    `int` | `getExtent()` Returns the "extent" from the `BoundedRangeModel`.
    `boolean` | `getInverted()` Returns true if the value-range shown for the slider is reversed,
    `Dictionary` | `getLabelTable()` Returns the dictionary of what labels to draw at which values.
    `int` | `getMajorTickSpacing()` This method returns the major tick spacing.
    `int` | `getMaximum()` Returns the maximum value supported by the slider from the `BoundedRangeModel`.
    `int` | `getMinimum()` Returns the minimum value supported by the slider from the `BoundedRangeModel`.
    `int` | `getMinorTickSpacing()` This method returns the minor tick spacing.
    `BoundedRangeModel` | `getModel()` Returns the `BoundedRangeModel` that handles the slider's three fundamental properties: minimum, maximum, value.
    `int` | `getOrientation()` Return this slider's vertical or horizontal orientation.
    `boolean` | `getPaintLabels()` Tells if labels are to be painted.
    `boolean` | `getPaintTicks()` Tells if tick marks are to be painted.
    `boolean` | `getPaintTrack()` Tells if the track (area the slider slides in) is to be painted.
    `boolean` | `getSnapToTicks()` Returns true if the knob (and the data value it represents) resolve to the closest tick mark next to where the user positioned the knob.
    `SliderUI` | `getUI()` Gets the UI object which implements the L&F for this component.
    `String` | `getUIClassID()` Returns the name of the L&F class that renders this component.
    `int` | `getValue()` Returns the slider's current value from the `BoundedRangeModel`.
    `boolean` | `getValueIsAdjusting()` Returns the `valueIsAdjusting` property from the model.
    `boolean` | `imageUpdate(Image img, int infoflags, int x, int y, int w, int h)` Repaints the component when the image has changed.
    `protected String` | `paramString()` Returns a string representation of this JSlider.
    `void` | `removeChangeListener(ChangeListener l)` Removes a ChangeListener from the slider.
    `void` | `setExtent(int extent)` Sets the size of the range "covered" by the knob.
    `void` | `setFont(Font font)` Sets the font for this component.
    `void` | `setInverted(boolean b)` Specify true to reverse the value-range shown for the slider and false to put the value range in the normal order.
    `void` | `setLabelTable(Dictionary labels)` Used to specify what label will be drawn at any given value.
    `void` | `setMajorTickSpacing(int n)` This method sets the major tick spacing.
    `void` | `setMaximum(int maximum)` Sets the slider's maximum value to `maximum`.
    `void` | `setMinimum(int minimum)` Sets the slider's minimum value to `minimum`.
    `void` | `setMinorTickSpacing(int n)` This method sets the minor tick spacing.
    `void` | `setModel(BoundedRangeModel newModel)` Sets the `BoundedRangeModel` that handles the slider's three fundamental properties: minimum, maximum, value.
    `void` | `setOrientation(int orientation)` Set the slider's orientation to either `SwingConstants.VERTICAL` or `SwingConstants.HORIZONTAL`.
    `void` | `setPaintLabels(boolean b)` Determines whether labels are painted on the slider.
    `void` | `setPaintTicks(boolean b)` Determines whether tick marks are painted on the slider.
    `void` | `setPaintTrack(boolean b)` Determines whether the track is painted on the slider.
    `void` | `setSnapToTicks(boolean b)` Specifying true makes the knob (and the data value it represents) resolve to the closest tick mark next to where the user positioned the knob.
    `void` | `setUI(SliderUI ui)` Sets the UI object which implements the L&F for this component.
    `void` | `setValue(int n)` Sets the slider's current value to `n`.
    `void` | `setValueIsAdjusting(boolean b)` Sets the model's `valueIsAdjusting` property.
    `protected void` | `updateLabelUIs()` Updates the UIs for the labels in the label table by calling `updateUI` on each label.
    `void` | `updateUI()` Resets the UI property to a value from the current look and feel.

    - ### Methods inherited from class javax.swing.JComponent

      `addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, 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, setEnabled, setFocusTraversalKeys, 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, 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

    - #### sliderModel

          protected BoundedRangeModel sliderModel

      The data model that handles the numeric maximum value, minimum value, and current-position value for the slider.

    - #### majorTickSpacing

          protected int majorTickSpacing

      The number of values between the major tick marks -- the larger marks that break up the minor tick marks.

    - #### minorTickSpacing

          protected int minorTickSpacing

      The number of values between the minor tick marks -- the smaller marks that occur between the major tick marks.
      See Also:
        `setMinorTickSpacing(int)`

    - #### snapToTicks

          protected boolean snapToTicks

      If true, the knob (and the data value it represents) resolve to the closest tick mark next to where the user positioned the knob. The default is false.
      See Also:
        `setSnapToTicks(boolean)`

    - #### orientation

          protected int orientation

      Whether the slider is horizontal or vertical The default is horizontal.
      See Also:
        `setOrientation(int)`

    - #### changeListener

          protected ChangeListener changeListener

      The changeListener (no suffix) is the listener we add to the slider's model. This listener is initialized to the `ChangeListener` returned from `createChangeListener`, which by default just forwards events to `ChangeListener`s (if any) added directly to the slider.
      See Also:
        `addChangeListener(javax.swing.event.ChangeListener)`, `createChangeListener()`

    - #### changeEvent

          protected transient ChangeEvent changeEvent

      Only one `ChangeEvent` is needed per slider instance since the event's only (read-only) state is the source property. The source of events generated here is always "this". The event is lazily created the first time that an event notification is fired.
      See Also:
        `fireStateChanged()`

  - ### Constructor Detail

    - #### JSlider

          public JSlider()

      Creates a horizontal slider with the range 0 to 100 and an initial value of 50.

    - #### JSlider

          public JSlider(int orientation)

      Creates a slider using the specified orientation with the range `0` to `100` and an initial value of `50`. The orientation can be either `SwingConstants.VERTICAL` or `SwingConstants.HORIZONTAL`.
      Parameters:
        `orientation` - the orientation of the slider
      Throws:
        `IllegalArgumentException` - if orientation is not one of `VERTICAL`, `HORIZONTAL`
      See Also:
        `setOrientation(int)`

    - #### JSlider

          public JSlider(int min,
                 int max)

      Creates a horizontal slider using the specified min and max with an initial value equal to the average of the min plus max.

      The `BoundedRangeModel` that holds the slider's data handles any issues that may arise from improperly setting the minimum and maximum values on the slider. See the `BoundedRangeModel` documentation for details.

      Parameters:
        `min` - the minimum value of the slider
        `max` - the maximum value of the slider
      See Also:
        `BoundedRangeModel`, `setMinimum(int)`, `setMaximum(int)`

    - #### JSlider

          public JSlider(int min,
                 int max,
                 int value)

      Creates a horizontal slider using the specified min, max and value.

      The `BoundedRangeModel` that holds the slider's data handles any issues that may arise from improperly setting the minimum, initial, and maximum values on the slider. See the `BoundedRangeModel` documentation for details.

      Parameters:
        `min` - the minimum value of the slider
        `max` - the maximum value of the slider
        `value` - the initial value of the slider
      See Also:
        `BoundedRangeModel`, `setMinimum(int)`, `setMaximum(int)`, `setValue(int)`

    - #### JSlider

          public JSlider(int orientation,
                 int min,
                 int max,
                 int value)

      Creates a slider with the specified orientation and the specified minimum, maximum, and initial values. The orientation can be either `SwingConstants.VERTICAL` or `SwingConstants.HORIZONTAL`.

      The `BoundedRangeModel` that holds the slider's data handles any issues that may arise from improperly setting the minimum, initial, and maximum values on the slider. See the `BoundedRangeModel` documentation for details.

      Parameters:
        `orientation` - the orientation of the slider
        `min` - the minimum value of the slider
        `max` - the maximum value of the slider
        `value` - the initial value of the slider
      Throws:
        `IllegalArgumentException` - if orientation is not one of `VERTICAL`, `HORIZONTAL`
      See Also:
        `BoundedRangeModel`, `setOrientation(int)`, `setMinimum(int)`, `setMaximum(int)`, `setValue(int)`

    - #### JSlider

          public JSlider(BoundedRangeModel brm)

      Creates a horizontal slider using the specified BoundedRangeModel.

  - ### Method Detail

    - #### getUI

          public SliderUI getUI()

      Gets the UI object which implements the L&F for this component.
      Returns:
        the SliderUI object that implements the Slider L&F

    - #### setUI

          public void setUI(SliderUI ui)

      Sets the UI object which implements the L&F for this component.
      Parameters:
        `ui` - the SliderUI L&F object
      See Also:
        `UIDefaults.getUI(javax.swing.JComponent)`

    - #### updateUI

          public void updateUI()

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

    - #### getUIClassID

          public String getUIClassID()

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

    - #### createChangeListener

          protected ChangeListener createChangeListener()

      Subclasses that want to handle `ChangeEvent`s from the model differently can override this to return an instance of a custom `ChangeListener` implementation. The default `ChangeListener` simply calls the `fireStateChanged` method to forward `ChangeEvent`s to the `ChangeListener`s that have been added directly to the slider.
      See Also:
        `changeListener`, `fireStateChanged()`, `ChangeListener`, `BoundedRangeModel`

    - #### addChangeListener

          public void addChangeListener(ChangeListener l)

      Adds a ChangeListener to the slider.
      Parameters:
        `l` - the ChangeListener to add
      See Also:
        `fireStateChanged()`, `removeChangeListener(javax.swing.event.ChangeListener)`

    - #### removeChangeListener

          public void removeChangeListener(ChangeListener l)

      Removes a ChangeListener from the slider.
      Parameters:
        `l` - the ChangeListener to remove
      See Also:
        `fireStateChanged()`, `addChangeListener(javax.swing.event.ChangeListener)`

    - #### getChangeListeners

          public ChangeListener[] getChangeListeners()

      Returns an array of all the `ChangeListener`s added to this JSlider with addChangeListener().
      Returns:
        all of the `ChangeListener`s added or an empty array if no listeners have been added
      Since:
        1.4

    - #### fireStateChanged

          protected void fireStateChanged()

      Send a `ChangeEvent`, whose source is this `JSlider`, to all `ChangeListener`s that have registered interest in `ChangeEvent`s. This method is called each time a `ChangeEvent` is received from the model.

      The event instance is created if necessary, and stored in `changeEvent`.

      See Also:
        `addChangeListener(javax.swing.event.ChangeListener)`, `EventListenerList`

    - #### getModel

          public BoundedRangeModel getModel()

      Returns the `BoundedRangeModel` that handles the slider's three fundamental properties: minimum, maximum, value.
      Returns:
        the data model for this component
      See Also:
        `setModel(javax.swing.BoundedRangeModel)`, `BoundedRangeModel`

    - #### setModel

          public void setModel(BoundedRangeModel newModel)

      Sets the `BoundedRangeModel` that handles the slider's three fundamental properties: minimum, maximum, value.

      Attempts to pass a `null` model to this method result in undefined behavior, and, most likely, exceptions.

      Parameters:
        `newModel` - the new, `non-null` `BoundedRangeModel` to use
      See Also:
        `getModel()`, `BoundedRangeModel`

    - #### getValue

          public int getValue()

      Returns the slider's current value from the `BoundedRangeModel`.
      Returns:
        the current value of the slider
      See Also:
        `setValue(int)`, `BoundedRangeModel.getValue()`

    - #### setValue

          public void setValue(int n)

      Sets the slider's current value to `n`. This method forwards the new value to the model.

      The data model (an instance of `BoundedRangeModel`) handles any mathematical issues arising from assigning faulty values. See the `BoundedRangeModel` documentation for details.

      If the new value is different from the previous value, all change listeners are notified.

      Parameters:
        `n` - the new value
      See Also:
        `getValue()`, `addChangeListener(javax.swing.event.ChangeListener)`, `BoundedRangeModel.setValue(int)`

    - #### getMinimum

          public int getMinimum()

      Returns the minimum value supported by the slider from the `BoundedRangeModel`.
      Returns:
        the value of the model's minimum property
      See Also:
        `setMinimum(int)`, `BoundedRangeModel.getMinimum()`

    - #### setMinimum

          public void setMinimum(int minimum)

      Sets the slider's minimum value to `minimum`. This method forwards the new minimum value to the model.

      The data model (an instance of `BoundedRangeModel`) handles any mathematical issues arising from assigning faulty values. See the `BoundedRangeModel` documentation for details.

      If the new minimum value is different from the previous minimum value, all change listeners are notified.

      Parameters:
        `minimum` - the new minimum
      See Also:
        `getMinimum()`, `addChangeListener(javax.swing.event.ChangeListener)`, `BoundedRangeModel.setMinimum(int)`

    - #### getMaximum

          public int getMaximum()

      Returns the maximum value supported by the slider from the `BoundedRangeModel`.
      Returns:
        the value of the model's maximum property
      See Also:
        `setMaximum(int)`, `BoundedRangeModel.getMaximum()`

    - #### setMaximum

          public void setMaximum(int maximum)

      Sets the slider's maximum value to `maximum`. This method forwards the new maximum value to the model.

      The data model (an instance of `BoundedRangeModel`) handles any mathematical issues arising from assigning faulty values. See the `BoundedRangeModel` documentation for details.

      If the new maximum value is different from the previous maximum value, all change listeners are notified.

      Parameters:
        `maximum` - the new maximum
      See Also:
        `getMaximum()`, `addChangeListener(javax.swing.event.ChangeListener)`, `BoundedRangeModel.setMaximum(int)`

    - #### getValueIsAdjusting

          public boolean getValueIsAdjusting()

      Returns the `valueIsAdjusting` property from the model. For details on how this is used, see the `setValueIsAdjusting` documentation.
      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. Slider look and feel implementations should set this property to `true` when a knob drag begins, and to `false` when the drag ends.
      Parameters:
        `b` - the new value for the `valueIsAdjusting` property
      See Also:
        `getValueIsAdjusting()`, `BoundedRangeModel.setValueIsAdjusting(boolean)`

    - #### getExtent

          public int getExtent()

      Returns the "extent" from the `BoundedRangeModel`. This respresents the range of values "covered" by the knob.
      Returns:
        an int representing the extent
      See Also:
        `setExtent(int)`, `BoundedRangeModel.getExtent()`

    - #### setExtent

          public void setExtent(int extent)

      Sets the size of the range "covered" by the knob. Most look and feel implementations will change the value by this amount if the user clicks on either side of the knob. This method just forwards the new extent value to the model.

      The data model (an instance of `BoundedRangeModel`) handles any mathematical issues arising from assigning faulty values. See the `BoundedRangeModel` documentation for details.

      If the new extent value is different from the previous extent value, all change listeners are notified.

      Parameters:
        `extent` - the new extent
      See Also:
        `getExtent()`, `BoundedRangeModel.setExtent(int)`

    - #### getOrientation

          public int getOrientation()

      Return this slider's vertical or horizontal orientation.
      Returns:
        `SwingConstants.VERTICAL` or `SwingConstants.HORIZONTAL`
      See Also:
        `setOrientation(int)`

    - #### setOrientation

          public void setOrientation(int orientation)

      Set the slider's orientation to either `SwingConstants.VERTICAL` or `SwingConstants.HORIZONTAL`.
      Parameters:
        `orientation` - `HORIZONTAL` or `VERTICAL`
      Throws:
        `IllegalArgumentException` - if orientation is not one of `VERTICAL`, `HORIZONTAL`
      See Also:
        `getOrientation()`

    - #### setFont

          public void setFont(Font font)

      Sets the font for this component.
      Overrides:
        `setFont` in class `JComponent`
      Parameters:
        `font` - the desired `Font` for this component
      Since:
        1.6
      See Also:
        `Component.getFont()`

    - #### imageUpdate

          public boolean imageUpdate(Image img,
                            int infoflags,
                            int x,
                            int y,
                            int w,
                            int h)

      Repaints the component when the image has changed. This `imageUpdate` method of an `ImageObserver` is called when more information about an image which had been previously requested using an asynchronous routine such as the `drawImage` method of `Graphics` becomes available. See the definition of `imageUpdate` for more information on this method and its arguments.

      The `imageUpdate` method of `Component` incrementally draws an image on the component as more of the bits of the image are available.

      If the system property `awt.image.incrementaldraw` is missing or has the value `true`, the image is incrementally drawn. If the system property has any other value, then the image is not drawn until it has been completely loaded.

      Also, if incremental drawing is in effect, the value of the system property `awt.image.redrawrate` is interpreted as an integer to give the maximum redraw rate, in milliseconds. If the system property is missing or cannot be interpreted as an integer, the redraw rate is once every 100ms.

      The interpretation of the `x`, `y`, `width`, and `height` arguments depends on the value of the `infoflags` argument.

      Specified by:
        `imageUpdate` in interface `ImageObserver`
      Overrides:
        `imageUpdate` in class `Component`
      Parameters:
        `img` - the image being observed
        `infoflags` - see `imageUpdate` for more information
        `x` - the x coordinate
        `y` - the y coordinate
        `w` - the width
        `h` - the height
      Returns:
        `false` if the infoflags indicate that the image is completely loaded; `true` otherwise.
      Since:
        1.7
      See Also:
        `ImageObserver`, `Graphics.drawImage(Image, int, int, Color, java.awt.image.ImageObserver)`, `Graphics.drawImage(Image, int, int, java.awt.image.ImageObserver)`, `Graphics.drawImage(Image, int, int, int, int, Color, java.awt.image.ImageObserver)`, `Graphics.drawImage(Image, int, int, int, int, java.awt.image.ImageObserver)`, `ImageObserver.imageUpdate(java.awt.Image, int, int, int, int, int)`

    - #### getLabelTable

          public Dictionary getLabelTable()

      Returns the dictionary of what labels to draw at which values.
      Returns:
        the `Dictionary` containing labels and where to draw them

    - #### setLabelTable

          public void setLabelTable(Dictionary labels)

      Used to specify what label will be drawn at any given value. The key-value pairs are of this format: `{ Integer value, java.swing.JComponent label }`.

      An easy way to generate a standard table of value labels is by using the `createStandardLabels` method.

      Once the labels have been set, this method calls `updateLabelUIs()`. Note that the labels are only painted if the `paintLabels` property is `true`.

      Parameters:
        `labels` - new `Dictionary` of labels, or `null` to remove all labels
      See Also:
        `createStandardLabels(int)`, `getLabelTable()`, `setPaintLabels(boolean)`

    - #### updateLabelUIs

          protected void updateLabelUIs()

      Updates the UIs for the labels in the label table by calling `updateUI` on each label. The UIs are updated from the current look and feel. The labels are also set to their preferred size.
      See Also:
        `setLabelTable(java.util.Dictionary)`, `JComponent.updateUI()`

    - #### createStandardLabels

          public Hashtable createStandardLabels(int increment)

      Creates a `Hashtable` of numerical text labels, starting at the slider minimum, and using the increment specified. For example, if you call `createStandardLabels( 10 )` and the slider minimum is zero, then labels will be created for the values 0, 10, 20, 30, and so on.

      For the labels to be drawn on the slider, the returned `Hashtable` must be passed into `setLabelTable`, and `setPaintLabels` must be set to `true`.

      For further details on the makeup of the returned `Hashtable`, see the `setLabelTable` documentation.

      Parameters:
        `increment` - distance between labels in the generated hashtable
      Returns:
        a new `Hashtable` of labels
      Throws:
        `IllegalArgumentException` - if `increment` is less than or equal to zero
      See Also:
        `setLabelTable(java.util.Dictionary)`, `setPaintLabels(boolean)`

    - #### createStandardLabels

          public Hashtable createStandardLabels(int increment,
                                       int start)

      Creates a `Hashtable` of numerical text labels, starting at the starting point specified, and using the increment specified. For example, if you call `createStandardLabels( 10, 2 )`, then labels will be created for the values 2, 12, 22, 32, and so on.

      For the labels to be drawn on the slider, the returned `Hashtable` must be passed into `setLabelTable`, and `setPaintLabels` must be set to `true`.

      For further details on the makeup of the returned `Hashtable`, see the `setLabelTable` documentation.

      Parameters:
        `increment` - distance between labels in the generated hashtable
        `start` - value at which the labels will begin
      Returns:
        a new `Hashtable` of labels
      Throws:
        `IllegalArgumentException` - if `start` is out of range, or if `increment` is less than or equal to zero
      See Also:
        `setLabelTable(java.util.Dictionary)`, `setPaintLabels(boolean)`

    - #### getInverted

          public boolean getInverted()

      Returns true if the value-range shown for the slider is reversed,
      Returns:
        true if the slider values are reversed from their normal order
      See Also:
        `setInverted(boolean)`

    - #### setInverted

          public void setInverted(boolean b)

      Specify true to reverse the value-range shown for the slider and false to put the value range in the normal order. The order depends on the slider's `ComponentOrientation` property. Normal (non-inverted) horizontal sliders with a `ComponentOrientation` value of `LEFT_TO_RIGHT` have their maximum on the right. Normal horizontal sliders with a `ComponentOrientation` value of `RIGHT_TO_LEFT` have their maximum on the left. Normal vertical sliders have their maximum on the top. These labels are reversed when the slider is inverted.

      By default, the value of this property is `false`.

      Parameters:
        `b` - true to reverse the slider values from their normal order

    - #### getMajorTickSpacing

          public int getMajorTickSpacing()

      This method returns the major tick spacing. The number that is returned represents the distance, measured in values, between each major tick mark. If you have a slider with a range from 0 to 50 and the major tick spacing is set to 10, you will get major ticks next to the following values: 0, 10, 20, 30, 40, 50.
      Returns:
        the number of values between major ticks
      See Also:
        `setMajorTickSpacing(int)`

    - #### setMajorTickSpacing

          public void setMajorTickSpacing(int n)

      This method sets the major tick spacing. The number that is passed in represents the distance, measured in values, between each major tick mark. If you have a slider with a range from 0 to 50 and the major tick spacing is set to 10, you will get major ticks next to the following values: 0, 10, 20, 30, 40, 50.

      In order for major ticks to be painted, `setPaintTicks` must be set to `true`.

      This method will also set up a label table for you. If there is not already a label table, and the major tick spacing is `> 0`, and `getPaintLabels` returns `true`, a standard label table will be generated (by calling `createStandardLabels`) with labels at the major tick marks. For the example above, you would get text labels: "0", "10", "20", "30", "40", "50". The label table is then set on the slider by calling `setLabelTable`.

      Parameters:
        `n` - new value for the `majorTickSpacing` property
      See Also:
        `getMajorTickSpacing()`, `setPaintTicks(boolean)`, `setLabelTable(java.util.Dictionary)`, `createStandardLabels(int)`

    - #### getMinorTickSpacing

          public int getMinorTickSpacing()

      This method returns the minor tick spacing. The number that is returned represents the distance, measured in values, between each minor tick mark. If you have a slider with a range from 0 to 50 and the minor tick spacing is set to 10, you will get minor ticks next to the following values: 0, 10, 20, 30, 40, 50.
      Returns:
        the number of values between minor ticks
      See Also:
        `getMinorTickSpacing()`

    - #### setMinorTickSpacing

          public void setMinorTickSpacing(int n)

      This method sets the minor tick spacing. The number that is passed in represents the distance, measured in values, between each minor tick mark. If you have a slider with a range from 0 to 50 and the minor tick spacing is set to 10, you will get minor ticks next to the following values: 0, 10, 20, 30, 40, 50.

      In order for minor ticks to be painted, `setPaintTicks` must be set to `true`.

      Parameters:
        `n` - new value for the `minorTickSpacing` property
      See Also:
        `getMinorTickSpacing()`, `setPaintTicks(boolean)`

    - #### getSnapToTicks

          public boolean getSnapToTicks()

      Returns true if the knob (and the data value it represents) resolve to the closest tick mark next to where the user positioned the knob.
      Returns:
        true if the value snaps to the nearest tick mark, else false
      See Also:
        `setSnapToTicks(boolean)`

    - #### setSnapToTicks

          public void setSnapToTicks(boolean b)

      Specifying true makes the knob (and the data value it represents) resolve to the closest tick mark next to where the user positioned the knob. By default, this property is `false`.
      Parameters:
        `b` - true to snap the knob to the nearest tick mark
      See Also:
        `getSnapToTicks()`

    - #### getPaintTicks

          public boolean getPaintTicks()

      Tells if tick marks are to be painted.
      Returns:
        true if tick marks are painted, else false
      See Also:
        `setPaintTicks(boolean)`

    - #### setPaintTicks

          public void setPaintTicks(boolean b)

      Determines whether tick marks are painted on the slider. By default, this property is `false`.
      Parameters:
        `b` - whether or not tick marks should be painted
      See Also:
        `getPaintTicks()`

    - #### getPaintTrack

          public boolean getPaintTrack()

      Tells if the track (area the slider slides in) is to be painted.
      Returns:
        true if track is painted, else false
      See Also:
        `setPaintTrack(boolean)`

    - #### setPaintTrack

          public void setPaintTrack(boolean b)

      Determines whether the track is painted on the slider. By default, this property is `true`.
      Parameters:
        `b` - whether or not to paint the slider track
      See Also:
        `getPaintTrack()`

    - #### getPaintLabels

          public boolean getPaintLabels()

      Tells if labels are to be painted.
      Returns:
        true if labels are painted, else false
      See Also:
        `setPaintLabels(boolean)`

    - #### setPaintLabels

          public void setPaintLabels(boolean b)

      Determines whether labels are painted on the slider.

      This method will also set up a label table for you. If there is not already a label table, and the major tick spacing is `> 0`, a standard label table will be generated (by calling `createStandardLabels`) with labels at the major tick marks. The label table is then set on the slider by calling `setLabelTable`.

      By default, this property is `false`.

      Parameters:
        `b` - whether or not to paint labels
      See Also:
        `getPaintLabels()`, `getLabelTable()`, `createStandardLabels(int)`

    - #### paramString

          protected String paramString()

      Returns a string representation of this JSlider. 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 JSlider.

    - #### getAccessibleContext

          public AccessibleContext getAccessibleContext()

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

Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2015, Oracle and/or its affiliates. All rights reserved.