javax.swing.plaf.synth

## Class SynthSplitPaneUI

- java.lang.Object
- - javax.swing.plaf.ComponentUI
  - - javax.swing.plaf.SplitPaneUI
    - - javax.swing.plaf.basic.BasicSplitPaneUI
      - - javax.swing.plaf.synth.SynthSplitPaneUI

- All Implemented Interfaces:
    PropertyChangeListener, EventListener, SynthConstants, SynthUI

      public class SynthSplitPaneUI
      extends BasicSplitPaneUI
      implements PropertyChangeListener, SynthUI

  Provides the Synth L&F UI delegate for `JSplitPane`.
  Since:
    1.7

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class javax.swing.plaf.basic.BasicSplitPaneUI

      `BasicSplitPaneUI.BasicHorizontalLayoutManager, BasicSplitPaneUI.BasicVerticalLayoutManager, BasicSplitPaneUI.FocusHandler, BasicSplitPaneUI.KeyboardDownRightHandler, BasicSplitPaneUI.KeyboardEndHandler, BasicSplitPaneUI.KeyboardHomeHandler, BasicSplitPaneUI.KeyboardResizeToggleHandler, BasicSplitPaneUI.KeyboardUpLeftHandler, BasicSplitPaneUI.PropertyHandler`

  - ### Field Summary

    - ### Fields inherited from class javax.swing.plaf.basic.BasicSplitPaneUI

      `beginDragDividerLocation, divider, dividerResizeToggleKey, dividerSize, downKey, draggingHW, endKey, focusListener, homeKey, KEYBOARD_DIVIDER_MOVE_OFFSET, keyboardDownRightListener, keyboardEndListener, keyboardHomeListener, keyboardResizeToggleListener, keyboardUpLeftListener, layoutManager, leftKey, NON_CONTINUOUS_DIVIDER, nonContinuousLayoutDivider, propertyChangeListener, rightKey, splitPane, upKey`

    - ### Fields inherited from interface javax.swing.plaf.synth.SynthConstants

      `DEFAULT, DISABLED, ENABLED, FOCUSED, MOUSE_OVER, PRESSED, SELECTED`

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `SynthSplitPaneUI()` |

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `BasicSplitPaneDivider` | `createDefaultDivider()` | Creates the default divider.
    `protected Component` | `createDefaultNonContinuousLayoutDivider()` | Returns the default non continuous layout divider, which is an instance of `Canvas` that fills in the background with dark gray.
    `static ComponentUI` | `createUI(JComponent x)` | Creates a new SynthSplitPaneUI instance
    `void` | `finishedPaintingChildren(JSplitPane jc, Graphics g)` | Called when the specified split pane has finished painting its children.
    `SynthContext` | `getContext(JComponent c)` | Returns the Context for the specified component.
    `protected void` | `installDefaults()` | Installs the UI defaults.
    `protected void` | `installListeners()` | Installs the event listeners for the UI.
    `void` | `paint(Graphics g, JComponent c)` | Paints the specified component according to the Look and Feel.
    `protected void` | `paint(SynthContext context, Graphics g)` | Paints the specified component.
    `void` | `paintBorder(SynthContext context, Graphics g, int x, int y, int w, int h)` | Paints the border.
    `void` | `propertyChange(PropertyChangeEvent e)` | This method gets called when a bound property is changed.
    `protected void` | `uninstallDefaults()` | Uninstalls the UI defaults.
    `protected void` | `uninstallListeners()` | Uninstalls the event listeners from the UI.
    `void` | `update(Graphics g, JComponent c)` | Notifies this UI delegate to repaint the specified component.

    - ### Methods inherited from class javax.swing.plaf.basic.BasicSplitPaneUI

      `createFocusListener, createKeyboardDownRightListener, createKeyboardEndListener, createKeyboardHomeListener, createKeyboardResizeToggleListener, createKeyboardUpLeftListener, createPropertyChangeListener, dragDividerTo, finishDraggingTo, getDivider, getDividerBorderSize, getDividerLocation, getInsets, getLastDragLocation, getMaximumDividerLocation, getMaximumSize, getMinimumDividerLocation, getMinimumSize, getNonContinuousLayoutDivider, getOrientation, getPreferredSize, getSplitPane, installKeyboardActions, installUI, isContinuousLayout, resetLayoutManager, resetToPreferredSizes, setContinuousLayout, setDividerLocation, setLastDragLocation, setNonContinuousLayoutDivider, setNonContinuousLayoutDivider, setOrientation, startDragging, uninstallKeyboardActions, uninstallUI`

    - ### Methods inherited from class javax.swing.plaf.ComponentUI

      `contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior`

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

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

- - ### Constructor Detail

    - #### SynthSplitPaneUI

          public SynthSplitPaneUI()

  - ### Method Detail

    - #### createUI

          public static ComponentUI createUI(JComponent x)

      Creates a new SynthSplitPaneUI instance
      Parameters:
        `x` - component to create UI object for
      Returns:
        the UI object

    - #### installDefaults

          protected void installDefaults()

      Installs the UI defaults.
      Overrides:
        `installDefaults` in class `BasicSplitPaneUI`

    - #### installListeners

          protected void installListeners()

      Installs the event listeners for the UI.
      Overrides:
        `installListeners` in class `BasicSplitPaneUI`

    - #### uninstallDefaults

          protected void uninstallDefaults()

      Uninstalls the UI defaults.
      Overrides:
        `uninstallDefaults` in class `BasicSplitPaneUI`

    - #### uninstallListeners

          protected void uninstallListeners()

      Uninstalls the event listeners from the UI.
      Overrides:
        `uninstallListeners` in class `BasicSplitPaneUI`

    - #### getContext

          public SynthContext getContext(JComponent c)

      Returns the Context for the specified component.
      Specified by:
        `getContext` in interface `SynthUI`
      Parameters:
        `c` - Component requesting SynthContext.
      Returns:
        SynthContext describing component.

    - #### propertyChange

          public void propertyChange(PropertyChangeEvent e)

      This method gets called when a bound property is changed.
      Specified by:
        `propertyChange` in interface `PropertyChangeListener`
      Parameters:
        `e` - A PropertyChangeEvent object describing the event source and the property that has changed.

    - #### createDefaultDivider

          public BasicSplitPaneDivider createDefaultDivider()

      Creates the default divider.
      Overrides:
        `createDefaultDivider` in class `BasicSplitPaneUI`

    - #### createDefaultNonContinuousLayoutDivider

          protected Component createDefaultNonContinuousLayoutDivider()

      Returns the default non continuous layout divider, which is an instance of `Canvas` that fills in the background with dark gray.
      Overrides:
        `createDefaultNonContinuousLayoutDivider` in class `BasicSplitPaneUI`

    - #### update

          public void update(Graphics g,
                             JComponent c)

      Notifies this UI delegate to repaint the specified component. This method paints the component background, then calls the `paint(SynthContext,Graphics)` method.

      In general, this method does not need to be overridden by subclasses. All Look and Feel rendering code should reside in the `paint` method.

      Overrides:
        `update` in class `ComponentUI`
      Parameters:
        `g` - the `Graphics` object used for painting
        `c` - the component being painted
      See Also:
        `paint(SynthContext,Graphics)`

    - #### paint

          public void paint(Graphics g,
                            JComponent c)

      Paints the specified component according to the Look and Feel.

      This method is not used by Synth Look and Feel. Painting is handled by the `paint(SynthContext,Graphics)` method.

      Overrides:
        `paint` in class `BasicSplitPaneUI`
      Parameters:
        `g` - the `Graphics` object used for painting
        `c` - the component being painted
      See Also:
        `paint(SynthContext,Graphics)`

    - #### paint

          protected void paint(SynthContext context,
                               Graphics g)

      Paints the specified component. This implementation does nothing.
      Parameters:
        `context` - context for the component being painted
        `g` - the `Graphics` object used for painting
      See Also:
        `update(Graphics,JComponent)`

    - #### paintBorder

          public void paintBorder(SynthContext context,
                                  Graphics g,
                                  int x,
                                  int y,
                                  int w,
                                  int h)

      Paints the border.
      Specified by:
        `paintBorder` in interface `SynthUI`
      Parameters:
        `context` - a component context
        `g` - `Graphics` to paint on
        `x` - the X coordinate
        `y` - the Y coordinate
        `w` - width of the border
        `h` - height of the border

    - #### finishedPaintingChildren

          public void finishedPaintingChildren(JSplitPane jc,
                                               Graphics g)

      Called when the specified split pane has finished painting its children.
      Overrides:
        `finishedPaintingChildren` in class `BasicSplitPaneUI`

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, 2026, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.