Method isVisa

src/main/java/com/jdon/util/UtilValidate.java:906–910

Checks to see if the cc number is a valid Visa number @param cc a string representing a credit card number; Sample number: 4111 1111 1111 1111(16 digits) @return true, if the credit card number is a valid VISA number, false otherwise

(String cc)

     * @return true, if the credit card number is a valid VISA number, false otherwise
     */
    public static boolean isVisa(String cc) {
        if (((cc.length() == 16) || (cc.length() == 13)) && (cc.substring(0, 1).equals("4")))
            return isCreditCard(cc);
        return false;
    }

    /** Checks to see if the cc number is a valid Master Card number
     *