为什么我无法格式化其他两个国家的货币中国和法国

Question

我能够格式化美国和印度的货币。我已经尝试过使用Localebuilder的一些实现，任何人都可以解释一下我所缺少的内容。

 import java.io.*;
 import java.util.*;
 import java.text.*;
 import java.math.*;
 import java.util.regex.*;
 import java.text.NumberFormat;
 import java.util.Locale;

 public class Solution {

 public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    double payment = scanner.nextDouble();
    scanner.close();

    // Write your code here.

    NumberFormat us = NumberFormat.getCurrencyInstance(Locale.US);
    System.out.println("US: " + us.format(payment));

    Locale indiaa = new Locale("en", "IN");
    NumberFormat india = NumberFormat.getCurrencyInstance(indiaa);
    System.out.println("India: " + india.format(payment));

    Locale chinaLocale = new Locale.Builder().setLanguage("zh").setRegion("CN").build();
    NumberFormat china = NumberFormat.getCurrencyInstance(chinaLocale);
    System.out.println("China: " + china.format(payment));


    NumberFormat france =  NumberFormat.getCurrencyInstance(Locale.FRANCE);
    System.out.println("France: " + france.format(payment));
    }
    }
    The Output I am getting
    US: $12,324.13
    India: Rs.12,324.13
    China: ?12,324.13
    France: 12?324,13 ?

    Expected Output
    US: $12,324.13
    India: Rs.12,324.13
    China: ￥12,324.13
    France: 12 324,13 €

我仍然是初学者在此先感谢

Answer 1

Locale中没有INDIA的字段，因此，您需要为INDIA创建自定义Locale。但是我没有看到您提到的CHINA和FRANCE这样的问题。请查看以下程序的输出：

import java.text.NumberFormat;
import java.util.Locale;
import java.util.Scanner;

public class Solution {
    public static void main(String[] args) {
        System.out.print("Enter an amount: ");
        Scanner scanner = new Scanner(System.in);
        double payment = scanner.nextDouble();
        scanner.close();

        Locale indiaLocale = new Locale("en", "IN");

        NumberFormat us     = NumberFormat.getCurrencyInstance(Locale.US);
        NumberFormat india  = NumberFormat.getCurrencyInstance(indiaLocale);
        NumberFormat china  = NumberFormat.getCurrencyInstance(Locale.CHINA);
        NumberFormat france = NumberFormat.getCurrencyInstance(Locale.FRANCE);

        System.out.println("US: "     + us.format(payment));
        System.out.println("India: "  + india.format(payment));
        System.out.println("China: "  + china.format(payment));
        System.out.println("France: " + france.format(payment));
    }
}

示例运行：

Enter an amount: 200.34
US: $200.34
India: ₹ 200.34
China: ￥200.34
France: 200,34 €