}

    /**
     * Checks if the password contains at least one digit.
     *
     * @param password the password to check
     * @return true if the password contains a digit, false otherwise
     */
    protected boolean containsDigit(final String password) {
        for (int i = 0; i < password.length(); i++) {
            if (Character.isDigit(password.charAt(i))) {
                return true;
            }

errors.password_no_uppercase = Password must contain at least one uppercase letter.
errors.password_no_lowercase = Password must contain at least one lowercase letter.
errors.password_no_digit = Password must contain at least one digit.
errors.password_no_special_char = Password must contain at least one special character.
errors.password_is_blacklisted = Password is not allowed. Please choose a different password.

errors.password_no_uppercase = Password must contain at least one uppercase letter.
errors.password_no_lowercase = Password must contain at least one lowercase letter.
errors.password_no_digit = Password must contain at least one digit.
errors.password_no_special_char = Password must contain at least one special character.
errors.password_is_blacklisted = Password is not allowed. Please choose a different password.

    public static final String ERRORS_password_no_lowercase = "{errors.password_no_lowercase}";

    /** The key of the message: Password must contain at least one digit. */
    public static final String ERRORS_password_no_digit = "{errors.password_no_digit}";

    /** The key of the message: Password must contain at least one special character. */

# Require uppercase letters in password.
password.require.uppercase=false

# Require lowercase letters in password.
password.require.lowercase=false

# Require digits in password.
password.require.digit=false

# Require special characters in password.
password.require.special.char=false


# ----------------------------------------------------------

    /**
     * Get the value for the key 'password.require.digit'. <br>
     * The value is, e.g. false <br>
     * comment: Require digits in password.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getPasswordRequireDigit();

    /**
     * Is the property for the key 'password.require.digit' true? <br>
     * The value is, e.g. false <br>

are in <a href="#Rune_literals">rune literals</a> (except that <code>\'</code> is illegal and
<code>\"</code> is legal), with the same restrictions.
The three-digit octal (<code>\</code><i>nnn</i>)
and two-digit hexadecimal (<code>\x</code><i>nn</i>) escapes represent individual
<i>bytes</i> of the resulting string; all other escapes represent
the (possibly multi-byte) UTF-8 encoding of individual <i>characters</i>.