Question

我想用Java创建一个程序，以从user_input获取数字并将其设置为货币格式...这是我的代码

package Seperator_checker;

import java.util.Scanner;

public class Seperator {

    public static void main(String[] args) {
        Scanner number=new Scanner(System.in);
        System.out.print("Please Enter Your Number: ");
        String user_number=number.next();
        if(user_number.length()> 3) {
            user_number=user_number.substring(0,user_number.length()-3) + "," + user_number.substring(0,1);
            System.out.println("________________________________________");
            System.out.println("Your Currency Number Is: "+ user_number);
        }

    }

}

Answer 1

我能想到的一个自发答案是将字符串拆分为一个字符列表，并向后浏览并在每第三步之后插入,，直到到达起点为止。

伪代码：

Convert String to Char List
goto end of List
counter = 0
while havent reached beginning of list
    counter += 1
    if counter == 3
        counter = 0
        insert ',' into List
        //maybe go back one here too depending on implementation of 
        //insert and which is the current element after inserting
    end if
    go one back one element in List
end while

对不起，我不知道如何编写伪代码

使用子字符串java的单独数字

1 个答案: