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POCredit card type and validation
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  1. POCredit card type and validation
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    copied!<p>I would like to run a program that can determine the validation and type of credit card number based of number entered. Compiler shows notification that there is an error in my coding but I cannot detect where is it. The program is also cannot be run. Below is the coding,</p> <pre><code> import java.util.*; public class CreditCard { public static void main(String args[]) { String CType;(String number) { if (number.startsWith("4")) return "Visa"; else if (number.startsWith("5")) return "MasterCard"; else if (number.startsWith("6")) return "Discover"; else if (number.startsWith("37")) return "American Express"; else return "Unknown type"; }; Scanner input = new Scanner(System.in); System.out.println("Enter a credit card number: "); long number = input.nextLong(); long total = sumOfEvenPlaces(number) + (sumOfOddPlaces(number)*2); if (isValid(total)) { System.out.println("The "+CType+" card number is valid"); } else { System.out.println("The "+CType+" card number is invalid."); } } public static boolean isValid(long total) { if (total % 10 != 0) { } else { return true; } return false; } public static int sumOfEvenPlaces(long number) { int sum = 0; int remainder; while (number % 10 != 0 || number / 10 != 0) { remainder = (int) (number % 10); sum = sum + getDigit(remainder * 2); number /= 100; } return sum; } public static int getDigit(int number) { if (number &gt; 9) { return (number % 10 + number / 10); } return number; } public static int sumOfOddPlaces(long number) { int sum = 0; int remainder; number /= 10; while (number % 10 != 0 || number / 10 != 0) { remainder = (int) (number % 10); sum = sum + getDigit(remainder * 2); number /= 100; } return sum; } } </code></pre>
 

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