Android Credit Card Check FindCreditCard(String AccountNumber)

Description

Find Credit Card

Declaration

public static int FindCreditCard(String AccountNumber) 

Method Source Code

//package com.java2s;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static final int VISA = 0;
    public static final int MASTERCARD = 1;
    public static final int AMERICAN_EXPRESS = 2;
    public static final int DISCOVER = 3;
    public static final int DINERS_CLUB = 4;
    public static final int JCB = 5;
    public static final int NOT_RECOGNIZED = 6;

    public static int FindCreditCard(String AccountNumber) {
        if (AccountNumber == null) {
            return NOT_RECOGNIZED;
        }//  w  w  w . j a  va2s  .c  o m

        AccountNumber = UnFormatAccountNumber(AccountNumber);

        AccountNumber = AccountNumber.trim();
        if (AccountNumber.length() == 0) {
            return NOT_RECOGNIZED;
        }

        if (IsVISACreditCard(AccountNumber)) {
            return VISA;
        } else if (IsMasterCardCreditCard(AccountNumber)) {
            return MASTERCARD;
        } else if (IsAmericanExpressCreditCard(AccountNumber)) {
            return AMERICAN_EXPRESS;
        } else if (IsDinersClubCreditCard(AccountNumber)) {
            return DINERS_CLUB;
        } else if (IsDiscoverCreditCard(AccountNumber)) {
            return DISCOVER;
        } else if (IsJCBCreditCard(AccountNumber)) {
            return JCB;
        } else {
            return NOT_RECOGNIZED;
        }
    }

    public static String UnFormatAccountNumber(String AccountNumber) {
        /*      StringBuilder sb = new StringBuilder();
              Pattern p = Pattern.compile("(\\d+)");
              Matcher m = p.matcher(AccountNumber);
              while (m.find())
              {
                 sb.append(m.group(1));
              }
              return sb.toString();*/

        String result = AccountNumber;
        if (containsNonNumericCharacters(AccountNumber)) {
            StringBuilder sb = new StringBuilder();
            Pattern p = Pattern.compile("(\\d+)");
            Matcher m = p.matcher(AccountNumber);
            while (m.find()) {
                sb.append(m.group(1));
            }
            result = sb.toString();
        }
        return result;
    }

    private static boolean IsVISACreditCard(String UnformattedAccountNumber) {
        Pattern p = Pattern.compile("^4[0-9]{12}(?:[0-9]{3})?$");
        Matcher m = p.matcher(UnformattedAccountNumber);
        return m.matches();
    }

    private static boolean IsMasterCardCreditCard(
            String UnformattedAccountNumber) {
        Pattern p = Pattern.compile("^5[1-5][0-9]{14}$");
        Matcher m = p.matcher(UnformattedAccountNumber);
        return m.matches();
    }

    private static boolean IsAmericanExpressCreditCard(
            String UnformattedAccountNumber) {
        Pattern p = Pattern.compile("^3[47][0-9]{13}$");
        Matcher m = p.matcher(UnformattedAccountNumber);
        return m.matches();
    }

    private static boolean IsDinersClubCreditCard(
            String UnformattedAccountNumber) {
        Pattern p = Pattern.compile("^3(?:0[0-5]|[68][0-9])[0-9]{11}$");
        Matcher m = p.matcher(UnformattedAccountNumber);
        return m.matches();
    }

    private static boolean IsDiscoverCreditCard(
            String UnformattedAccountNumber) {
        Pattern p = Pattern.compile("^6(?:011|5[0-9]{2})[0-9]{12}$");
        Matcher m = p.matcher(UnformattedAccountNumber);
        return m.matches();
    }

    private static boolean IsJCBCreditCard(String UnformattedAccountNumber) {
        Pattern p = Pattern.compile("^(?:2131|1800|35\\d{3})\\d{11}$");
        Matcher m = p.matcher(UnformattedAccountNumber);
        return m.matches();
    }

    public static boolean containsNonNumericCharacters(String rawInput) {
        Pattern p = Pattern.compile("(\\D+)");
        Matcher m = p.matcher(rawInput);
        return m.find();
    }
}

Related

1. IsDinersClubCreditCard( String UnformattedAccountNumber)
2. IsDiscoverCreditCard( String UnformattedAccountNumber)
3. IsJCBCreditCard(String UnformattedAccountNumber)
4. IsMasterCardCreditCard( String UnformattedAccountNumber)
5. IsVISACreditCard(String UnformattedAccountNumber)
6. FormatAccountNumber( String UnformattedAccountNumber, int subGroupLength, String Seperator)
7. FormatAmericanExpress( String UnformattedAccountNumber, String Seperator)
8. FormatDinersClub(String UnformattedAccountNumber, String Seperator)