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Packages that use javax.swing.undo 
| Package | Description |  
| javax.swing.event | Provides for events fired by Swing components. |  
| 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. |  
 
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Classes in javax.swing.undo used by javax.swing.undo 
| Class | Description |  
| AbstractUndoableEdit | An abstract implementation of UndoableEdit,
 implementing simple responses to all boolean methods in
 that interface. |  
| CannotRedoException | Thrown when an UndoableEdit is told to redo()and can't. |  
| CannotUndoException | Thrown when an UndoableEdit is told to undo()and can't. |  
| CompoundEdit | A concrete subclass of AbstractUndoableEdit, used to assemble little
 UndoableEdits into great big ones. |  
| StateEditable | StateEditable defines the interface for objects that can have
 their state undone/redone by a StateEdit. |  
| UndoableEdit | An UndoableEditrepresents an edit. |