练习——简单的规格化处理键盘接收的数

发布时间 2023-03-31 18:02:35作者: Q1uuuu
package com.stringbuffer_;

import java.math.BigDecimal;
import java.util.Scanner;

public class StringBufferExercise01 {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        if(scanner.hasNextBigDecimal()){
            BigDecimal bd = scanner.nextBigDecimal();
            System.out.println(bd);
            String str = String.valueOf(bd);
            System.out.println(str);
            StringBuffer sb = new StringBuffer(str);
            for (int j = sb.lastIndexOf(".")-3; j > 0 ; j-=3) {
                sb=sb.insert(j,",");
            }
            System.out.println(sb);

        }
		scanner.close();
    }
}
//主要练习StringBuffer类的常用方法,以及BigDecimal