Question

我想知道如何将输出格式化为金钱。由于我是Java的初学者，我希望尽可能使用最简单的解决方案，尽管我对所有建议持开放态度。

public static void main(String[] args) 
 {
    int numUnits;
    double price;
    String item;
    Scanner scan = new Scanner(System.in);

    // get the data
    System.out.println("How many units?");
    numUnits = scan.nextInt();

    System.out.println("What is the price?");
    price = scan.nextDouble();

    scan.nextLine();
    System.out.println("What is the name of the item?");
    item = scan.nextLine();

    //calculations
    double totalCost = numUnits * price;

    System.out.println(numUnits + " units of "+ item + " were purchased for $"+
    price + " each for a total cost of $" + totalCost);

   }

 }

Answer 1

您可以通过多种方式执行此操作，可以使用NumberFormat.getCurrencyInstance()，这样您就可以根据当前的区域设置属性格式化值...

System.out.println(numUnits + " units of "+ item + " were purchased for $"+
price + " each for a total cost of $" + NumberFormat.getCurrencyInstance().format(totalCost));

您还可以通过首先获取对实例的引用来格式化NumberFormat以满足您的需求...

NumberFormat nf = NumberFormat.getCurrencyInstance();
// Customise format properties...

Answer 2

    double amount =500.0;
    NumberFormat currencyFormatter = NumberFormat.getCurrencyInstance(new Locale("en", "US"));
    System.out.println(currencyFormatter.format(amount));

您应该使用适合您想要使用的货币的区域设置

格式化两个小数位或双Java货币

2 个答案: