Uses of Class javax.swing.undo.CannotUndoException (Java SE 9 & JDK 9 )

## Uses of Class
javax.swing.undo.CannotUndoException

- Packages that use CannotUndoException
  Package | Description
  --- | ---
  javax.swing.text | Provides classes and interfaces that deal with editable and noneditable text components.
  javax.swing.undo | Allows developers to provide support for undo/redo in applications such as text editors.

- - ### Uses of CannotUndoException in javax.swing.text

    Methods in javax.swing.text that throw CannotUndoException
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | AbstractDocument.DefaultDocumentEvent.`undo​()` | Undoes a change.
    `void` | AbstractDocument.ElementEdit.`undo​()` | Undoes a change.
    `void` | DefaultStyledDocument.AttributeUndoableEdit.`undo​()` | Undoes a change.

  - ### Uses of CannotUndoException in javax.swing.undo

    Methods in javax.swing.undo that throw CannotUndoException
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | AbstractUndoableEdit.`undo​()` | Throws `CannotUndoException` if `canUndo` returns `false`.
    `void` | CompoundEdit.`undo​()` | Sends `undo` to all contained `UndoableEdits` in the reverse of the order in which they were added.
    `void` | UndoableEdit.`undo​()` | Undo the edit.
    `void` | UndoManager.`undo​()` | Undoes the appropriate edits.
    `void` | UndoManager.`undoOrRedo​()` | Convenience method that invokes one of `undo` or `redo`.
    `protected void` | UndoManager.`undoTo​(UndoableEdit edit)` | Undoes all changes from the index of the next edit to `edit`, updating the index of the next edit appropriately.