# 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.