StyledEditorKit.UnderlineAction (Java Platform SE 8 )
Keywords: javax.swing.text.StyledEditorKit.UnderlineAction class
Date: 2026-03-16

javax.swing.text

## Class StyledEditorKit.UnderlineAction

- java.lang.Object
- - javax.swing.AbstractAction
  - - javax.swing.text.TextAction
    - - javax.swing.text.StyledEditorKit.StyledTextAction
      - - javax.swing.text.StyledEditorKit.UnderlineAction

- All Implemented Interfaces:
    ActionListener, Serializable, Cloneable, EventListener, Action
  Enclosing class:
    StyledEditorKit

      public static class StyledEditorKit.UnderlineAction
      extends StyledEditorKit.StyledTextAction

  An action to toggle the underline attribute.

  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 JavaBeans™ has been added to the `java.beans` package. Please see `XMLEncoder`.

- - ### Field Summary

    - ### Fields inherited from class javax.swing.AbstractAction

      `changeSupport, enabled`

    - ### Fields inherited from interface javax.swing.Action

      `ACCELERATOR_KEY, ACTION_COMMAND_KEY, DEFAULT, DISPLAYED_MNEMONIC_INDEX_KEY, LARGE_ICON_KEY, LONG_DESCRIPTION, MNEMONIC_KEY, NAME, SELECTED_KEY, SHORT_DESCRIPTION, SMALL_ICON`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `UnderlineAction()` Constructs a new UnderlineAction.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `actionPerformed(ActionEvent e)` Toggles the Underline attribute.

    - ### Methods inherited from class javax.swing.text.StyledEditorKit.StyledTextAction

      `getEditor, getStyledDocument, getStyledEditorKit, setCharacterAttributes, setParagraphAttributes`

    - ### Methods inherited from class javax.swing.text.TextAction

      `augmentList, getFocusedComponent, getTextComponent`

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

      `addPropertyChangeListener, clone, firePropertyChange, getKeys, getPropertyChangeListeners, getValue, isEnabled, putValue, removePropertyChangeListener, setEnabled`

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

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

- - ### Constructor Detail

    - #### UnderlineAction

          public UnderlineAction()

      Constructs a new UnderlineAction.

  - ### Method Detail

    - #### actionPerformed

          public void actionPerformed(ActionEvent e)

      Toggles the Underline attribute.
      Parameters:
        `e` - the action event

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