SynthLabelUI (Java Platform SE 8 )
Keywords: javax.swing.plaf.synth.SynthLabelUI class
Date: 2026-04-24

javax.swing.plaf.synth

## Class SynthLabelUI

- java.lang.Object
- - javax.swing.plaf.ComponentUI
  - - javax.swing.plaf.LabelUI
    - - javax.swing.plaf.basic.BasicLabelUI
      - - javax.swing.plaf.synth.SynthLabelUI

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

      public class SynthLabelUI
      extends BasicLabelUI
      implements SynthUI

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

- - ### Field Summary

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

      `labelUI`

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

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

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `SynthLabelUI()`

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static ComponentUI` | `createUI(JComponent c)` Returns the LabelUI implementation used for the skins look and feel.
    `int` | `getBaseline(JComponent c, int width, int height)` Returns the baseline.
    `SynthContext` | `getContext(JComponent c)` Returns the Context for the specified component.
    `Dimension` | `getMaximumSize(JComponent c)` Returns the specified component's maximum size appropriate for the look and feel.
    `Dimension` | `getMinimumSize(JComponent c)` Returns the specified component's minimum size appropriate for the look and feel.
    `Dimension` | `getPreferredSize(JComponent c)` Returns the specified component's preferred size appropriate for the look and feel.
    `protected void` | `installDefaults(JLabel c)` Installs default properties.
    `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(JLabel c)` Uninstalls default properties.
    `void` | `update(Graphics g, JComponent c)` Notifies this UI delegate to repaint the specified component.

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

      `getBaselineResizeBehavior, installComponents, installKeyboardActions, installListeners, installUI, layoutCL, paintDisabledText, paintEnabledText, uninstallComponents, uninstallKeyboardActions, uninstallListeners, uninstallUI`

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

      `contains, getAccessibleChild, getAccessibleChildrenCount`

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

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

- - ### Constructor Detail

    - #### SynthLabelUI

          public SynthLabelUI()

  - ### Method Detail

    - #### createUI

          public static ComponentUI createUI(JComponent c)

      Returns the LabelUI implementation used for the skins look and feel.
      Parameters:
        `c` - component to create UI object for
      Returns:
        the UI object

    - #### installDefaults

          protected void installDefaults(JLabel c)

      Installs default properties.
      Overrides:
        `installDefaults` in class `BasicLabelUI`
      Parameters:
        `c` - an instance of `JLabel`

    - #### uninstallDefaults

          protected void uninstallDefaults(JLabel c)

      Uninstalls default properties.
      Overrides:
        `uninstallDefaults` in class `BasicLabelUI`
      Parameters:
        `c` - an instance of `JLabel`

    - #### 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.

    - #### getBaseline

          public int getBaseline(JComponent c,
                                 int width,
                                 int height)

      Returns the baseline.
      Overrides:
        `getBaseline` in class `BasicLabelUI`
      Parameters:
        `c` - `JComponent` baseline is being requested for
        `width` - the width to get the baseline for
        `height` - the height to get the baseline for
      Returns:
        baseline or a value < 0 indicating there is no reasonable baseline
      See Also:
        `JComponent.getBaseline(int, int)`

    - #### 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 `BasicLabelUI`
      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.
      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

    - #### getPreferredSize

          public Dimension getPreferredSize(JComponent c)

      Returns the specified component's preferred size appropriate for the look and feel. If `null` is returned, the preferred size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method returns `null`.
      Overrides:
        `getPreferredSize` in class `BasicLabelUI`
      Parameters:
        `c` - the component whose preferred size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
      See Also:
        `JComponent.getPreferredSize()`, `LayoutManager.preferredLayoutSize(java.awt.Container)`

    - #### getMinimumSize

          public Dimension getMinimumSize(JComponent c)

      Returns the specified component's minimum size appropriate for the look and feel. If `null` is returned, the minimum size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method invokes `getPreferredSize` and returns that value.
      Overrides:
        `getMinimumSize` in class `BasicLabelUI`
      Parameters:
        `c` - the component whose minimum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
      Returns:
        getPreferredSize(c)
      See Also:
        `JComponent.getMinimumSize()`, `LayoutManager.minimumLayoutSize(java.awt.Container)`, `ComponentUI.getPreferredSize(javax.swing.JComponent)`

    - #### getMaximumSize

          public Dimension getMaximumSize(JComponent c)

      Returns the specified component's maximum size appropriate for the look and feel. If `null` is returned, the maximum size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method invokes `getPreferredSize` and returns that value.
      Overrides:
        `getMaximumSize` in class `BasicLabelUI`
      Parameters:
        `c` - the component whose maximum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
      Returns:
        getPreferredSize(c)
      See Also:
        `JComponent.getMaximumSize()`, `LayoutManager2.maximumLayoutSize(java.awt.Container)`

    - #### propertyChange

          public void propertyChange(PropertyChangeEvent e)

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

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