给正整数加千分位逗号。示例：输入整数：1234567890输出字符串：1,234,567,890

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        //Scanner in = new Scanner(System.in);

        //int a = in.nextInt();

        //System.out.println(a);

        String inStr = "1234567890";

        String[] temp = inStr.split("");

        String outStr = "";

        for (int i=0;i

           //System.out.println(i%3+"|"+i);

            if(i%3==0&&i!=temp.length-1){

                outStr =outStr+temp[i]+","; 

            }else{

                outStr =outStr+temp[i]; 

            }

            //System.out.println(outStr);

        }

        System.out.println(outStr);

        System.out.println("Hello World!");

    }

}