How to validate iranian Melli Code (National Code or Code Melli) in android

Question

I need a method to validate the Melli Code (National Code or Code Melli) of iranian people.

I Know it has a formula.

Answer 1

You can validate your national code like this:

Updated

public static boolean isValidNationalCode(String nationalCode)
{
      if (!nationalCode.matches("^\\d{10}$"))
          return false;

      int sum = 0;

      for (int i = 0; i < 9; i++)
      {
          sum += Character.getNumericValue(nationalCode.charAt(i)) * (10 - i);
      }

      int lastDigit = Integer.parseInt(String.valueOf(nationalCode.charAt(9)));
      int divideRemaining = sum % 11;

      return ((divideRemaining < 2 && lastDigit == divideRemaining) ||   (divideRemaining >= 2 && (11 - divideRemaining) == lastDigit ));
}