The Memento design pattern allows an object to restore itself to a previous state by storing internal state in memento objects and externalizing state storage in a caretaker object. The caretaker holds an array list of mementos representing different states that can be retrieved to roll back or undo changes to the originating object.

1. Memento Design Pattern
- Rakesh

2. Memento Design Pattern
● Memento -an object kept as a reminder of a person or event.

3. Memento Design Pattern
● Restore an object to its previous state. Example: “undo” or “rollback”.

4. Memento Design Pattern
● Restore an object to its previous state. Example: “undo” or “rollback”.
● Basic object that is stored in different states.

5. Memento Design Pattern
● Restore an object to its previous state. Example: “undo” or “rollback”.
● Basic object that is stored in different states.
● Caretaker: Holds an ArrayList that contains all previous versions of the
Memento. It can store and retrieve stored Mementos.