Regex - Java Regex Examples

    private static final Pattern VALID_EMAIL_PATTERN =
            Pattern.compile("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,6}$",
                    Pattern.CASE_INSENSITIVE);

    private static final Pattern VALID_PASSWORD_PATTERN =
            Pattern.compile("^[a-zA-Z0-9]{6,}$");