Country Currency formatting using 'NumberFormat' class Java

I'm currently working on a task that involves taking a double-precision number representing a sum of money and using the NumberFormat class' getCurrencyInstance method to convert it into the currency formats of US, India, China, and France.

Input:

A single double-precision number denoting 'payment'

Output:

On the first line, print US: 'u' where 'u' is 'payment' formatted for US currency.
On the second line, print India: 'i' where 'i' is 'payment' formatted for the Indian currency.
On the third line, print China: 'c' where 'c' is 'payment' formatted for Chinese currency.
On the fourth line, print France: 'f' where 'f' is formatted for French currency.

Sample input:

12324.134

Sample output:

US: $12,324.13

India: Rs.12,324.13

China: ￥12,324.13

France: 12 324,13 €

My code:

import java.util.*;
import java.text.*;
import java.util.Currency;

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");
        
        Locale locale = Locale.US;
        Currency us = Currency.getInstance(locale);
        String symbol = us.getSymbol(locale);
        System.out.println("US: " + symbol + payment);
        
        Locale locale2 = indiaLocale;
        Currency in = Currency.getInstance(locale2);
        String symbol2 = in.getSymbol(locale2);
        System.out.println("India: " + symbol2 + payment);
        
        Locale locale3 = Locale.CHINA;
        Currency ch = Currency.getInstance(locale3);
        String symbol3 = ch.getSymbol(locale3);
        System.out.println("China: " + symbol3 + payment);
        
        Locale locale4 = Locale.FRANCE;
        Currency fr = Currency.getInstance(locale4);
        String symbol4 = fr.getSymbol(locale4);
        System.out.println("France: " + payment + " " + symbol4);
    }
}

My input:

12324.134

My output:

US: $12324.134

India: Rs.12324.134

China: ￥12324.134

France: 12324.134 €

My problem lies in the format of the input, '12324.134'. As you can see, I've managed to output the right currency symbols, especially India as India does not have a built-in Locale, so I had to construct one where the language is en (i.e., English).

I just can't seem to get the commas in the right place and for some reason, France's expected output has a space after the first 2 digits. It might be because I haven't used the right methods of the Currency class but this is where Im stuck at. Any advice is appreciated.

NumberFormat.getCurrencyInstance

You probably should use NumberFormat.getCurrencyInstance and NumberFormat.format. Try this:

public static void main(String[] args) {
    double payment = 12324.134; // I'd use BigDecimal instead of double here, BTW. See the comment from another user under your post.

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

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

    Locale china = Locale.CHINA;
    System.out.println("China: " + NumberFormat.getCurrencyInstance(china).format(payment));

    Locale france = Locale.FRANCE;
    System.out.println("France: " + NumberFormat.getCurrencyInstance(france).format(payment));
}

The output is:

US: $12,324.13
India: ₹12,324.13
China: ¥12,324.13
France: 12 324,13 €

It is even said in your task:

using the NumberFormat class' getCurrencyInstance method