private Karyawan karyawan;

    private void cariKaryawan() {
        if (!validateIdKaryawan()) {
            return;
        }

        int id = Integer.parseInt(idKaryawanField.getText());

        try {
            KaryawanDao dao = new KaryawanDao();
            karyawan = dao.findBy(id);
            namaField.setText(karyawan.getNama());
        } catch (SQLException e) {
            karyawan = null;
            showFailedWarning("Tidak menemukan karyawan dengan id : " + id);
        }
    }

    private boolean validateDataKaryawan() {
        if (!validateIdKaryawan()) {
            return false;
        }

        return karyawan != null;
    }

    private boolean validateIdKaryawan() {
        String id = idKaryawanField.getText();

        if (id.isEmpty()) {
            showInfoWarning("ID Karyawan masih kosong");
            return false;
        }

        try {
            Integer.parseInt(id);
            return true;
        } catch (NumberFormatException e) {
            showInfoWarning("ID karyawan adalah angka");
            return false;
        }
    }

    private boolean validateUsername() {
        String username = usernameField.getText();

        if (username.isEmpty()) {
            showInfoWarning("Username masih kosong");
            return false;
        }

        return true;
    }

    private boolean validatePassword() {
        char[] password = passwordField.getPassword();

        if (password.length == 0) {
            showInfoWarning("Password masih kosong");
            return false;
        }

        return true;
    }

    private boolean validateRetypePassword() {
        char[] password = retypePasswordField.getPassword();

        if (password.length == 0) {
            showInfoWarning("Ketik ulang password anda");
            return false;
        }

        return true;
    }

    @Override
    protected boolean validateAllInput() {
        return validateDataKaryawan()
                && validateUsername()
                && validatePassword()
                && validateRetypePassword();
    }

    @Override
    protected JTextComponent[] getJTextComponents() {
        return new JTextComponent[] {
            idKaryawanField,
            namaField,
            usernameField,
            retypePasswordField,
            passwordField
        };
    }

    @Override
    protected void initData(User entity) {
        entity.setPassword(String.valueOf(passwordField.getPassword()));
        entity.setKaryawan(karyawan);
        entity.setUsername(usernameField.getText());
    }

    @Override
    protected void onViewDetail(User entity) {
        this.karyawan = entity.getKaryawan();
        idKaryawanField.setText(String.valueOf(karyawan.getId()));
        namaField.setText(karyawan.getNama());
        usernameField.setText(entity.getUsername());
        passwordField.setText(entity.getPassword());
        retypePasswordField.setText(entity.getPassword());
    }

    @Override
    protected BaseDao<User> getDao() {
        return new UserDao();
    }

    @Override
    protected User createNewEntity() {
        return new User();
    }

    @Override
    protected SaveButton getSaveButton() {
        return saveButton1;
    }

    @Override
    protected CancelButton getCancelButton() {
        return cancelButton1;
    }

    @Override
    protected ClearButton getClearButton() {
        return clearButton1;
    }