Method creditCard

src/main/java/com/github/javafaker/Finance.java:22–43

(CreditCardType creditCardType)

            createCountryCodeToBasicBankAccountNumberPatternMap();

    public String creditCard(CreditCardType creditCardType) {
        final String key = String.format("finance.credit_card.%s", creditCardType.toString().toLowerCase());
        String value = faker.fakeValuesService().resolve(key, this, faker);
        final String template = faker.numerify(value);

        String[] split = template.replaceAll("[^0-9]", "").split("");
        List<Integer> reversedAsInt = new ArrayList<Integer>();
        for (int i = 0; i < split.length; i++) {
            final String current = split[split.length - 1 - i];
            if (!current.isEmpty()) {
                reversedAsInt.add(Integer.valueOf(current));
            }
        }
        int luhnSum = 0;
        int multiplier = 1;
        for (Integer digit : reversedAsInt) {
            multiplier = (multiplier == 2 ? 1 : 2);
            luhnSum += sum(String.valueOf(digit * multiplier).split(""));
        }
        int luhnDigit = (10 - (luhnSum % 10)) % 10;
        return template.replace('\\', ' ').replace('/', ' ').trim().replace('L', String.valueOf(luhnDigit).charAt(0));
    }

    public String creditCard() {
        CreditCardType type = randomCreditCardType();