Question: Command pattern and a wordprocessor's Undo and Redo Experiment a bit with the effect of Ctrl+Z (for Undo) and Ctrl+Y (for Redo) in your wordprocessor.

Command pattern and a wordprocessor's Undo and Redo

Experiment a bit with the effect of Ctrl+Z (for Undo) and Ctrl+Y (for Redo) in your wordprocessor. What do you think might be a WordProcessorCommand in this context? What are the methods that WordProcessorCommand must implement? What kind of data structure might you need for holding the WordProcessorCommand objects? Draw a simple UML class diagram.

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