编写一个程序，验证从标准输入获得的信用卡号是否校验通过， 校验通过，则输出”成功“，校验未通过则输出”失败“。

public class YanZheng {public static void main(String[] args) {Scanner  sc = new Scanner(System.in);System.out.println("请输入你的信用卡号：");String  num = sc.nextLine();odd(num);even(num);if ((odd(num)+even(num))%10==0) {System.out.println("恭喜你，验证成功！");}else {System.out.println("对不起，验证失败！");}}private  static int odd(String  num) {// TODO Auto-generated method stubchar[] arr = num.toCharArray();int sum = 0;for (int i = arr.length-1; i >= 0; i-=2) {sum+=Character.getNumericValue(arr[i]);}return sum;}private static int even(String  num) {// TODO Auto-generated method stubchar[] arr = num.toCharArray();int sum = 0;int b = 0;for (int i = arr.length-2; i >= 0; i-=2) {b=Integer.parseInt(arr[i]+"")*2;if (b>9) {b=b-9;}sum+=b;}return sum;}}