身份证最后一位算法

import java.util.Scanner;
public class Id18 {
       //计算身份证最后一位算法，https://www.cnblogs.com/xudong-bupt/p/3293838.html
    int[] weight={7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2};    //十七位数字本体码权重
    char[] validate={ '1','0','X','9','8','7','6','5','4','3','2'};    //mod11,对应校验码字符值    
    
    public char getValidateCode(String id17){
        int sum=0;
        int mode=0;
        for(int i=0;i<id17.length();i++){
            sum=sum+Integer.parseInt(String.valueOf(id17.charAt(i)))*weight[i];
        }
        mode=sum%11;
        return validate[mode];
    }
    public static void main(String[] args){
        Id18 test=new Id18();
        Scanner scan = new Scanner(System.in);
        System.err.println("========请输入17位身份证号========");//53252719851212003
        String ID_NUM = scan.next();
        System.out.println("该身份最后一位证校验码为："+test.getValidateCode(ID_NUM));  
        System.out.println("完整身份证号码为："+ID_NUM+test.getValidateCode(ID_NUM)); 
    }
}