public static void main(String[] args)
    {
        changeJOP();
        directions();
        int totalSticks = 16;
        int[] numSticks = {1,3,5,7};
        int player = 0;
        String name[] = new String[2];
        name[0]=getName();
        name[1]=getName();
        while(totalSticks > 1) {
            if (player==0)
                player=1;
            else player=0;
            totalSticks = playGame(numSticks, totalSticks, name[player]);
        }
        printWinner(name[player], numSticks);
    }
    public static int playGame(int[] numSticks, int totalSticks, String name)
    {
        String[] stickChoices = {"Row 1","Row 2","Row 3","Row 4"};
        int whichRow = JOptionPane.showOptionDialog(null,
            getMatchString(numSticks)+name+", please pick a row"
            ,"Nim",0,3,null,stickChoices,null);
        while (numSticks[whichRow]==0)
            whichRow = JOptionPane.showOptionDialog(null,
                getMatchString(numSticks)+name+", please pick a row"
                ,"Nim",0,3,null,stickChoices,null);
        int howMany = Integer.parseInt(JOptionPane.showInputDialog(getMatchString(numSticks)+
            name+", how many matches would you like to take?"));
        while (howMany<=0 || numSticks[whichRow] - howMany<0){
            howMany = Integer.parseInt(JOptionPane.showInputDialog(getMatchString(numSticks)+
            name+", that is an invalid amount.\nHow many matches would you like to take?"));
        }
        numSticks[whichRow] -= howMany;
        totalSticks -= howMany;
        return totalSticks;
    }
    public static void directions()
    {
        JOptionPane.showMessageDialog(null,
            "Pick as many sticks as you want from\none of the four piles.\n"+
            "The goal of the game is to avoid\npicking the last sticks");
    }
    public static String getName()
    {
        return JOptionPane.showInputDialog("What is your name?");
    }
    public static void printWinner(String winner, int[] numSticks)
    {
        JOptionPane.showMessageDialog(null,
            getMatchString(numSticks)+winner+", you won!");
    }
    public static String getMatchString(int[] numSticks)
    {
        String returnString = "";
        for (int i=0;i<4;i++)
        {
            returnString += "Row "+(i+1)+": ";
            for (int j=0;j<numSticks[i];j++)
            {
                returnString += "| ";
            }
            returnString += "\n";
        }
        return returnString;
    }