java代码菜单的价格

java 实验 求解答

public?class?MenuTest?{

public?static?void?main(String[]?args)?{

String[]?arr=str.split("元");

double?tem=0;

for?(int?i?=?0;?i?arr.length;?i++)?{

tem+=Double.parseDouble(arr[i]);

}

System.out.println("\n---------------总菜单如下----------------\n\n"+s);

System.out.println("\n--------------------------------------\n\n");

System.out.println("总价格="+tem+"元");

高悬赏求java解答,求编写一个题,就是做一个菜单,要求有3个商品,要求输入名字和价格,然后输出出

import?java.io.File;

import?java.io.FileWriter;

import?java.io.IOException;

import?java.io.OutputStream;

import?java.io.Writer;

import?java.util.Scanner;

public?class?menu?{

//?TODO?Auto-generated?method?stub

StringBuffer?buffer?=new?StringBuffer();

String[]?num={"first","second","third"};

//变量i?为输入的次数.?如果有变动?直接修改即可.

System.out.println("Please?enter?the?name?of?the?"+num[i]+"?item:");

Scanner?nameSc?=?new?Scanner(System.in);?

buffer.append("("+nameSc.next()+"/");

System.out.println("Please?enter?the?"+num[i]+"?item?price:");

nameSc?=?new?Scanner(System.in);?

buffer.append(nameSc.next()+")");

buffer.append("\r\n");

System.out.println(buffer.toString());

try?{

//1、打开流

Writer?w=new?FileWriter("C://menu.txt",true);

w.write(buffer.toString());

w.close();

}?catch?(IOException?e)?{

System.out.println("文件写入错误："+e.getMessage());

//代码写的比较low ? 看不惯勿喷. 如果与你要求有出入,直接追问

一道Java程序题,关于Scanner类与字符串分解

public static void main(String args[]) {

Scanner scanner = new Scanner(menu);// Scanner类创建scanner,将menu传递给构造方法的参数

// scanner调用useDelimiter（String regex）,将regex传递给该方法的参数

scanner.useDelimiter(regex);

double sum = 0;

while (scanner.hasNext()) {

try {

double price = scanner.nextDouble();// scanner调用nextDouble（）返回数字单词

sum = sum + price;

System.out.println(price);

} catch (InputMismatchException exp) {

String t = scanner.next();

System.out.println("菜单总价格：" + sum + "元");

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