NumberFormat.getCurrencyInstance() 不返回语言环境中国和法国的货币符号 (jdk-1.8)

Question

我编写了一个程序来返回带有某些国家货币符号的双精度值。为此，我使用getCurrencyInstance() 方法来获取特定国家/地区的符号。

问题是特定于我的笔记本电脑的 JDK-1.8 并且在在线编译器上运行良好。 我面临的问题是 CHINA 和 FRANCE 的货币符号用“？”表示。但是对于 INDIA 和 US，会显示正确的符号。

我现在正在解决这个问题。因此，任何线索都会有所帮助。

这是我的代码：

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

public class Solution {

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

    /* Create custom Locale for India.
    Locale indiaLocale = new Locale("en", "IN");

    /* Create NumberFormats using Locales */
    NumberFormat us     = NumberFormat.getCurrencyInstance(Locale.US);
    NumberFormat india  = NumberFormat.getCurrencyInstance(indiaLocale);
    NumberFormat china  = NumberFormat.getCurrencyInstance(Locale.CHINA);
    NumberFormat france = NumberFormat.getCurrencyInstance(Locale.FRANCE);

    /* Print output */        
    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));
}
}

我机器上对应的输出是：

12324.134
US: $12,324.13
India: Rs.12,324.13
China: ?12,324.13
France: 12 324,13 ?

Answer 1

Hackerrank 挑战的问题是没有 UTF-8 编码。尝试使用这个：

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

public class Solution {

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

    /* Create custom Locale for India.*/
    Locale indiaLocale = new Locale("en", "IN");

    /* Create NumberFormats using Locales */
    NumberFormat us     = NumberFormat.getCurrencyInstance(Locale.US);
    NumberFormat india  = NumberFormat.getCurrencyInstance(indiaLocale);
    NumberFormat china  = NumberFormat.getCurrencyInstance(Locale.CHINA);
    NumberFormat france = NumberFormat.getCurrencyInstance(Locale.FRANCE);

    /* Print output */
    try {
      System.setOut(new PrintStream(new FileOutputStream(FileDescriptor.out), true, "UTF-8"));        
      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));
    } catch (Exception e) {
      System.out.println("HackerRank please fix your test terminal");
    }
  }
}

Answer 2

对于中国，请使用此代码。 Numberformat 类的 getCurrency().getSymbol(locale) 将返回特定地区的货币符号。 System.out.println("China: " + china.getCurrency().getSymbol(Locale.CHINA) + china.format(payment));

对于法国使用这个 System.out.println("France: " + france.format(payment) + " " + france.getCurrency().getSymbol(Locale.FRANCE));

Answer 3

解决方案会是这样的；......

对于 Indian Ruppe，没有货币。我们必须使用如下所示的 decimalFormatter 对其进行格式化。

DecimalFormat IndianCurrencyFormat = new DecimalFormat("##,##,###.00");
            NumberFormat nf = NumberFormat.getCurrencyInstance(Locale.US);
            NumberFormat nf1 = NumberFormat.getCurrencyInstance(Locale.CHINA);
            NumberFormat nf2 = NumberFormat.getCurrencyInstance(Locale.FRANCE);
            String us = nf.format(payment);
            String india ="Rs." + IndianCurrencyFormat.format(payment);
            String china =nf1.format(payment);
            String france =nf2.format(payment);
           System.out.println("US: " + us);
        System.out.println("India: " + india);
        System.out.println("China: " + china);
        System.out.println("France: " + france);

Answer 4

我的解决方案只是让 substring 摆脱 UTF-8 问题

import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;
/*
 * input 12324.134
 * output
 * US: $12,324.13
 * India: Rs.12,324.13
 * China: ￥12,324.13
 * France: 12 324,13 €
 */
import java.util.Scanner;

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.

        DecimalFormat formatter = new DecimalFormat("###,###.00");
        double roundOff = Math.round(payment * 100) / 100.00;
        String us = NumberFormat.getCurrencyInstance().format(roundOff);
        String india = "Rs." + formatter.format(roundOff);
        String china = NumberFormat.getCurrencyInstance(Locale.CHINA).format(roundOff);
        String france_initial = NumberFormat.getCurrencyInstance(Locale.FRENCH).format(roundOff);
        int len = france_initial.length();
        String france = france_initial.substring(0, len - 1) + " €";
        System.out.println("US: " + us);
        System.out.println("India: " + india);
        System.out.println("China: " + china);
        System.out.println("France: " + france);
    }
}

Answer 5

1. 如果您需要为货币设置符号，或者如果您 想自定义货币符号，你可以试试这个。

    Locale indialocal = new Locale("en","India");
    NumberFormat india = NumberFormat.getCurrencyInstance(indialocal);
   
    DecimalFormatSymbols deciFs = new DecimalFormatSymbols();
    deciFs.setCurrencySymbol("Rs.");
    ((DecimalFormat) india).setDecimalFormatSymbols(deciFs);
   
     System.out.println("India: " + india.format(payment));
   

Answer 6

这对 HackerRank 很有帮助。

创建局部变量，因为印度没有货币代码 参考这个-https://docs.oracle.com/javase/tutorial/i18n/locale/create.html

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

        // Write your code here.
        NumberFormat us = NumberFormat.getCurrencyInstance(Locale.US);
        NumberFormat india = NumberFormat.getCurrencyInstance(indiaLocale);
        NumberFormat china = NumberFormat.getCurrencyInstance(Locale.CHINA);
        NumberFormat france = NumberFormat.getCurrencyInstance(Locale.FRANCE);
        
        if(payment>=0 || payment<=Math.pow(10,9)){
            
            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));
        
        }
    }
}