Patterns

Pattern phoneNumberPattern = Pattern.compile("^(\\+370)([0-9]{8})$");
        Matcher phoneNumberMatcher = phoneNumberPattern.matcher("+37061370310");
        boolean isPhoneNumberCorrect = phoneNumberMatcher.matches();

        System.out.println(isPhoneNumberCorrect);

        Pattern emailPattern = Pattern.compile("^(\\+370)([0-9]{8})$");
        Matcher emailMatcher = phoneNumberPattern.matcher("+37061370310");
        boolean isEmailCorrect = phoneNumberMatcher.matches();

        System.out.println(isPhoneNumberCorrect);