cant convert bban to iban because bban for Norway is appended with "null" which increases its length and validation is failing

[sanathkd]

BBAN for Norway is appended with "null" which increases its length and hence validation is failing. Can you help me if i'm missing something? Or can this issue be fixed?

I feel its messed up in "iban.java" under method "formatIban()" when converting "toString" in the end.

        private String formatIban() {
            final StringBuilder sb = new StringBuilder();
            sb.append(countryCode.getAlpha2());
            sb.append(DEFAULT_CHECK_DIGIT);
            sb.append(formatBban());
            return sb.toString();
        }

Test Data BBAN: 44350343730
Code used:

String set = "44350343730";
String bankCode = "4435";
String account = "0343730";

Iban.Builder builder = new Iban.Builder();
builder.countryCode(CountryCode.NO);
builder.bankCode(bankCode);
builder.accountNumber(account);

Iban value = builder.build();

Error thrown:

Exception in thread "main" org.iban4j.IbanFormatException: [44350343730null] length is 15, expected BBAN length is: 11
	at org.iban4j.IbanUtil.validateBbanLength(IbanUtil.java:362)
	at org.iban4j.IbanUtil.validate(IbanUtil.java:79)
	at org.iban4j.Iban$Builder.build(Iban.java:365)
	at org.iban4j.Iban$Builder.build(Iban.java:337)

[hajk1]

Norway BBAN structure requires 'National Check digit' and 6 character 'Account number'. I think you are providing both in the account number field which is not correct. You might change your code to the below:
`

        String bankCode = "4435";
        String account = "034373";
        String nationalCheckDigit = "0";
  

        Iban.Builder builder = new Iban.Builder();
        builder.countryCode(CountryCode.NO);
        builder.bankCode(bankCode);
        builder.accountNumber(account);
        builder.nationalCheckDigit(nationalCheckDigit);
        Iban value = builder.build();

`

By the way, it is much better to validate this in the library. I will commit a change in order to validate such a case.