Enum что не так?

public enum gendertype {
        F,
        M;
    }

<div class="w3-card-4">
        <div class="w3-container w3-center w3-green">
            <h2>Add user</h2>
        </div>
        <form method="post" class="w3-selection w3-light-grey w3-padding">
            <label for="first-name">Имя:
                <input  type="text" id="first-name" name="first-name"  class="w3-input w3-animate-input w3-border w3-round-large" style="width: 30%"><br />
            </label><br />
            </label>

            <label for="last-name">Фамилия:
                <input type="text" id="last-name" name="last-name"  class="w3-input w3-animate-input w3-border w3-round-large" style="width: 30%"><br />
            </label><br />

            <label for="birthDate">Дата рождения
                <input class="input-field" type="text" id="birthDate" name="birthDate">
            </label>
            <select name="gender">
                <option value="F">жен.</option>
                <option value="M">муж.</option>
            </select>
            <button type="submit" class="w3-btn w3-green w3-round-large w3-margin-bottom">Submit</button>
        </form>
    </div>

@Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String firsName = req.getParameter("first-name");
        String lastName = req.getParameter("last-name");
       LocalDate birthDate = LocalDate.parse(req.getParameter("birthDate"));
       String genderUser = req.getParameter("gender");


        try {
            PreparedStatement preparedStatement = connection.prepareStatement("INSERT INTO data_user(firs_name, last_name, birth_date ,gender) VALUES (?,?,?,?)");
            preparedStatement.setString(1, firsName);
            preparedStatement.setString(2, lastName);
            preparedStatement.setDate(3,  java.sql.Date.valueOf(birthDate));

            preparedStatement.execute();

        }
        catch(SQLException e) {
            throw new IllegalStateException(e);
        }

    }