要求实现方法public String addTwoBigNumber(String s1,string s2) 大数相加，注意处理异常-优快云博客

本文介绍了一种使用Java实现的大数相加方法。通过BigInteger类处理超出常规整数范围的数值相加操作，并验证输入字符串是否符合数字格式。

import java.math.BigInteger;import java.util.Scanner;/** * 要求实现方法public String addTwoBigNumber(String s1,string s2) 大数相加，注意处理异常 * * public class Test{ * public String addTwoBigNumber(String s1,string s2) { * return ""; } * * public static void main(String[] args) { * Test test = new Test(); * test.addTwoBigNumber("123456789","987654321") * } * } * @author zxy * */public class Num09 {public String addTwoBigNumber(String s1,String s2){String result=null;if(isBigNumber(s1)&&isBigNumber(s2)){BigInteger bi1=new BigInteger(s1);BigInteger bi2=new BigInteger(s2);result=bi1.add(bi2).toString();}else{System.out.println("输入的字符不正确，必须都为0-9的数字");return "";}return result;}public static boolean isBigNumber(String str){String regex="^[0-9]*$";if(str.matches(regex)){return true;}else{return false;}} public static void main(String[] args) {Num09 num=new Num09();String result=num.addTwoBigNumber("123456789","987654321");System.out.println(result);}}