Question

我是高中三年级学生。难以确定如何使用货币格式。我正在 Java编程指南（第二版）中练习，我必须提醒员工汉堡，薯条和苏打水的数量。

薯条是1.09美元，汉堡是1.69美元，苏打水是0.99美元。

这是我的代码：

import java.util.Scanner;
/**
 * Order pg. 101
 * 
 * Garret Mantz
 * 2/10/2016
 */
public class Order {

public static void main(String[]args) {

final double pburgers=1.69;
final double pfries=1.09;
final double psodas=0.99;
final double ptax=0.065;
double burgers;
double fries;
double sodas;
double totaltax;
double total;
double tax;
double tendered;
double change;

Scanner input = new Scanner(System.in);


System.out.print("Enter the amount of burgers: ");
burgers = input.nextDouble();
System.out.print("Enter the amount of fries: ");
fries = input.nextDouble();
System.out.print("Enter the amount of sodas: ");
sodas = input.nextDouble();
System.out.print("Enter the amount tendered: ");
tendered = input.nextDouble();



totaltax = (burgers*pburgers)+(fries*pfries)+(sodas*psodas);
tax = totaltax*ptax;
total = totaltax + tax;
change = tendered - total;


System.out.println("Your total before tax is: \n" + totaltax);
System.out.println("Tax: \n" +  tax);
System.out.println("Your final total is: \n" + total);
System.out.println("Your change is: \n" + change);
 }
}

我只是想用钱格式，但我不确定如何。我确定这是一个愚蠢的问题，但谢谢你的帮助！

Answer 1

将println更改为这些，看看是否有帮助：

System.out.format("Your total before tax is: $%-5.2f\n", totaltax);
System.out.format("Tax: $%-5.2f\n", tax);
System.out.format("Your final total is: $%-5.2f\n", total);
System.out.format("Your change is: $%-5.2f\n", change);

还有：

NumberFormat formatter = NumberFormat.getCurrencyInstance();
String totalTaxString = formatter.format(totaltax);
String taxString = formatter.format(tax);
String totalString = formatter.format(total);
String changeString = formatter.format(change);

System.out.format("Your total before tax is: %s\n", totalTaxString);
System.out.format("Tax: %s\n", taxString);
System.out.format("Your final total is: %s\n", totalString);
System.out.format("Your change is: %s\n", changeString);

输出：

Your total before tax is: $8.53 
Tax: $0.55 
Your final total is: $9.08 
Your change is: $10.92

资金格式 - 我该如何使用它？

1 个答案: