Package javax.swing.undo

Allows developers to provide support for undo/redo in applications such as text editors.

Interface Summary
Interface	Description
StateEditable	StateEditable defines the interface for objects that can have their state undone/redone by a StateEdit.
UndoableEdit	An `UndoableEdit` represents an edit.

Class Summary
Class	Description
AbstractUndoableEdit	An abstract implementation of `UndoableEdit`, implementing simple responses to all boolean methods in that interface.
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.
UndoableEditSupport	A support class used for managing `UndoableEdit` listeners.
UndoManager	`UndoManager` manages a list of `UndoableEdits`, providing a way to undo or redo the appropriate edits.

Exception Summary
Exception	Description
CannotRedoException	Thrown when an UndoableEdit is told to `redo()` and can't.
CannotUndoException	Thrown when an UndoableEdit is told to `undo()` and can't.

Package javax.swing.undo Description

Allows developers to provide support for undo/redo in applications such as text editors.

Note: Most of the Swing API is not thread safe. For details, see Threads and Swing, a section in The Java Tutorial .