【面试题】Java 2 个 (多个) 大整数相加如何实现

/** * Created by shirenchuang on 2018/6/28. */public class BigDataAddUtils {    public static String add(String... params){        int maxLeng = 0;        //获取最大长度        for(String s :params){            if(s.length()>maxLeng)maxLeng=s.length();        }
        StringBuffer result = new StringBuffer();        //进位 数        int high= 0;        //将每个待加参数每一位相加 进位        for (int i = 0 ;i<maxLeng;i++){            int charInt = 0;            for(String s :params){                //高位不够用0代替                charInt += s.length()-1<i?0: Integer.parseInt(s.charAt(s.length()-1-i)+"");            }            charInt+=high;            //进位            high = charInt/10;            //当前位的值 为charInt 余数            int remainder = charInt%10;            result.append(remainder);        }        //最后一次进位        if(high>0){            result.append(high);        }        //反转 输出结果        return result.reverse().toString();    }
    public static void main(String[] args) {        System.out.print(add("10023888888888842340","9133333333319","1912"));    }}