Chess/Main at master · okayThen/Chess · GitHub

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public class MyProgram extends ConsoleProgram
{

    public void run()
    {
        int numPlayers;
        while(true)
        {
            numPlayers = readInteger("How many players? (0/1/2)");

            if(numPlayers != 0 || numPlayers != 1 || numPlayers != 2)
                System.out.println("Invalid entry, try again.");

            if(numPlayers == 0 || numPlayers == 1 || numPlayers == 2)
                break;
        }

        Game game = new Game(numPlayers);

        while(true)
        {
            Game.play();
            boolean again = readBoolean("Play again (Y/N)?");

            if(again != Character.ignoreCase(Y))
            {
                System.out.println("Thanks for playing!");
                break;
            }
        }
    }
}