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| public class LuhnVerification {
|
| static boolean checkNumber(String value) {
| int result = 0;
| boolean special = false;
| for (int i = value.length() - 1; i >= 0; i--) {
| int v = value.charAt(i) - '0';
| if (v < 0 || v > 9)
| return false;
| if (special) {
| v = v * 2;
| if (v > 9)
| v = v - 10 + 1;
| }
| result += v;
| special = !special;
| }
| System.out.println(result);
| return result % 10 == 0;
| }
|
| public static void main(String args[]) {
| System.out.println(checkNumber(""));
| }
|
| }
|
|
