格式化两位小数或双倍 Java 的货币

Question

我想弄清楚如何将输出格式化为金钱。由于我是 Java 的初学者，尽管我对所有建议持开放态度，但我想要最简单的解决方案。

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

好吧，有很多方法可以做到这一点，您可以使用 NumberFormat.getCurrencyInstance()，这将允许您根据当前的语言环境属性格式化值...

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 以满足您的需要...

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));

无论您要使用哪种货币，您都应该使用正确的语言环境

格式化两位小数或双倍 Java 的货币

Formatting two decimal places or currency of double Java

java

format

double

currency

decimal