import java.util.List;
import java.util.Stack;
import java.util.Vector;
public class RandomCardNumberGenerator {
public static final String[] MASTERCARD_PREFIX_LIST = new String[] { "0626" };
public static final String[] VISA_PREFIX_LIST = new String[] { "4539",
"4556", "4916", "4532", "4929", "40240071", "4485", "4716", "4" };
public static final String[] MASTERCARD_PREFIX_LIST2 = new String[] { "51",
"52", "53", "54", "55" };
public static final String[] AMEX_PREFIX_LIST = new String[] { "34", "37" };
public static final String[] DISCOVER_PREFIX_LIST = new String[] { "6011" };
public static final String[] DINERS_PREFIX_LIST = new String[] { "300",
"301", "302", "303", "36", "38" };
public static final String[] ENROUTE_PREFIX_LIST = new String[] { "2014",
"2149" };
public static final String[] JCB_PREFIX_LIST = new String[] { "35" };
public static final String[] VOYAGER_PREFIX_LIST = new String[] { "8699" };
static String strrev(String str) {
if (str == null)
return "";
String revstr = "";
for (int i = str.length() - 1; i >= 0; i--) {
revstr += str.charAt(i);
}
return revstr;
}
static String completed_number(String prefix, int length)
{
String ccnumber = prefix;
while (ccnumber.length() < (length - 1)) {
ccnumber += new Double(Math.floor(Math.random() * 10)).intValue();
}
String reversedCCnumberString = strrev(ccnumber);
List<Integer> reversedCCnumberList = new Vector<Integer>();
for (int i = 0; i < reversedCCnumberString.length(); i++) {
reversedCCnumberList.add(new Integer(String
.valueOf(reversedCCnumberString.charAt(i))));
}
int sum = 0;
int pos = 0;
Integer[] reversedCCnumber = reversedCCnumberList
.toArray(new Integer[reversedCCnumberList.size()]);
while (pos < length - 1) {
int odd = reversedCCnumber[pos] * 2;
if (odd > 9) {
odd -= 9;
}
sum += odd;
if (pos != (length - 2)) {
sum += reversedCCnumber[pos + 1];
}
pos += 2;
}
int checkdigit = new Double(
((Math.floor(sum / 10) + 1) * 10 - sum) % 10).intValue();
ccnumber += checkdigit;
return ccnumber;
}
public static String[] credit_card_number(String[] prefixList, int length,int howMany)
{
Stack<String> result = new Stack<String>();
for (int i = 0; i < howMany; i++) {
int randomArrayIndex = (int) Math.floor(Math.random()
* prefixList.length);
String ccnumber = prefixList[randomArrayIndex];
result.push(completed_number(ccnumber, length));
}
return result.toArray(new String[result.size()]);
}
public static String[] generateMasterCardNumbers(int howMany) {
return credit_card_number(MASTERCARD_PREFIX_LIST, 16, howMany);
}
public static String generateMasterCardNumber() {
return credit_card_number(MASTERCARD_PREFIX_LIST, 16, 1)[0];
}
public static boolean isValidCreditCardNumber(String creditCardNumber) {
boolean isValid = false;
try {
String reversedNumber = new StringBuffer(creditCardNumber)
.reverse().toString();
int mod10Count = 0;
for (int i = 0; i < reversedNumber.length(); i++) {
int augend = Integer.parseInt(String.valueOf(reversedNumber
.charAt(i)));
if (((i + 1) % 2) == 0) {
String productString = String.valueOf(augend * 2);
augend = 0;
for (int j = 0; j < productString.length(); j++) {
augend += Integer.parseInt(String.valueOf(productString
.charAt(j)));
}
}
mod10Count += augend;
}
if ((mod10Count % 10) == 0) {
isValid = true;
}
} catch (NumberFormatException e) {
}
return isValid;
}
private static int sumToSingleDigit(int k)
{
if (k < 10)
return k;
return sumToSingleDigit(k / 10) + (k % 10);
}
}
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Top comments (3)
Valid credit card generator works by generating standard credit card numbers for you. It generates a set of standard generate credit card, in the format that is used in most credit card transactions. It is a tool that you can use to get rid of identity theft. It is a security system that prevents unauthorized transactions of your credit cards online.
Here is another credit card generator, also check it out
dnschecker.org/credit-card-generat...
Different naming conventions, different bracket styles, some unused code... sorry man, but this looks like copy&pasted trash.