src/com/my/pro/utils/RandomCreditCardNumberGenerator.java

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package com.my.pro.utils;

import java.util.List;
import java.util.Stack;
import java.util.Vector;

public class RandomCreditCardNumberGenerator {

	public static final String[] VISA_PREFIX_LIST = new String[] { "4539",
			"4556", "4916", "4532", "4929", "40240071", "4485", "4716", "4" };

	public static final String[] MASTERCARD_PREFIX_LIST = 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;
	}

	/*
	 * 'prefix' is the start of the CC number as a string, any number of digits.
	 * 'length' is the length of the CC number to generate. Typically 13 or 16
	 */
	static String completed_number(String prefix, int length) {

		String ccnumber = prefix;

		// generate digits

		while (ccnumber.length() < (length - 1)) {
			ccnumber += new Double(Math.floor(Math.random() * 10)).intValue();
		}

		// reverse number and convert to int

		String reversedCCnumberString = strrev(ccnumber);

		List<Integer> reversedCCnumberList = new Vector<Integer>();
		for (int i = 0; i < reversedCCnumberString.length(); i++) {
			reversedCCnumberList.add(new Integer(String
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