Track Multiple States(Moves) in a game

Hello,
For one of my classes, we are writing a Mancala game and have an undo button to take back 3 moves. I am using ObjectOutputStream to save the file and reload the saved file if someone clicks undo.
The problem I am having is that I have to keep track of last 3 states (not one which I am doing). Any suggestions?
Thanks and happy thanksgiving ;)

kevinaworkman wrote:
Why don't you just have a Stack of those game states? When you click undo, just load the state that's on top of the stack.For all we know the OP may already be using the javax.swing.undo package, in which case a Stack would just be a crude version of the data structure already in use. But we haven't been told that. It would really help to know how the undo and redo processing is being handled in the existing code before trying to recommend changes to it.
Oops, sorry... we have indeed been told that, and the undo/redo strategy is to simply serialize the state of the game to a file. And apparently that doesn't scale to more than one level of undo. So, if you were stuck on that strategy, you could serialize the state to more than one file, and keep track of the files... using a Stack if you liked!

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