Note: Most of the Swing API is not thread safe. For details, see Concurrency in Swing, a section in The Java Tutorial.
| 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. | 
| StateEdit | StateEdit is a general edit for objects that change state. | 
| StateEditable | StateEditable defines the interface for objects that can have their state undone/redone by a StateEdit. | 
| UndoableEdit | An  UndoableEditrepresents an edit. | 
| UndoableEditSupport | A support class used for managing  UndoableEditlisteners. | 
| UndoManager | UndoManagermanages a list ofUndoableEdits, providing a way to undo or redo the appropriate edits. | 
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    https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/undo/package-summary.html