public class EANValidator {
    public static boolean validate(final String eanCode) {
       int checksum;
       char[] s = eanCode.toCharArray();
       int s1 = s[0];
       int s2 = s[1];
       int sum;

       for (int i = 0; i < s.length; i++) {
         if (i % 2 == 0) {
           s1 += (s[i] * 3);
         } else {
                   s2 += s[i];
                }

       }

       sum = s1 + s2;

       if (sum % 10 == 0) {
         checksum = 0;
       } else {
         checksum = 10 - (sum % 10);
       }

       if (checksum == s[(s.length - 1)]) {
         return true;
       } else {
                return false;
              }
    }
}