public void move(int spot, char symbol) {
        switch (spot) {
            case 1 : field[0][0] = symbol;
                break;
            case 2 : field[0][1] = symbol;
                break;
            case 3 : field[0][2] = symbol;
                break;
            case 4 : field[1][0] = symbol;
                break;
            case 5 : field[1][1] = symbol;
                break;
            case 6 : field[1][2] = symbol;
                break;
            case 7 : field[2][0] = symbol;
                break;
            case 8 : field[2][1] = symbol;
                break;
            case 9 : field[2][2] = symbol;
                break;
        }
    }