import java.util.; import java.text.;

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

    // Create India locale manually
    Locale indiaLocale = new Locale("en", "IN");

    // Create currency formatters
    NumberFormat usFormat = NumberFormat.getCurrencyInstance(Locale.US);
    NumberFormat indiaFormat = NumberFormat.getCurrencyInstance(indiaLocale);
    NumberFormat chinaFormat = NumberFormat.getCurrencyInstance(Locale.CHINA);
    NumberFormat franceFormat = NumberFormat.getCurrencyInstance(Locale.FRANCE);

    // Format the values
    String us = usFormat.format(payment);
    String india = indiaFormat.format(payment);
    String china = chinaFormat.format(payment);
    String france = franceFormat.format(payment);

    // Output exactly as required (no extra spaces)
    System.out.println("US: " + us);
    System.out.println("India: " + india);
    System.out.println("China: " + china);
    System.out.println("France: " + france);
}

}

in java 15

NumberFormat.getCurrencyInstance(new Locale("en","IN")).format(payment); --> this now returns the rubis char , it's been updated, the expected output of the exercice is Rs. , not the rubis icon, thats why i cannot pass the test cases

expected output should be updated.

public class Solution {

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

    Locale ind = new Locale("en","IN","Rs.");

    String us = NumberFormat.getCurrencyInstance(Locale.US).format(payment);
    String india = NumberFormat.getCurrencyInstance(ind).format(payment);
    String china = NumberFormat.getCurrencyInstance(Locale.CHINA).format(payment);      
    String france = NumberFormat.getCurrencyInstance(Locale.FRANCE).format(payment);

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

}

I managed to adapt the solution for Java 15 and I got the correct output, but the test fails either way 😞 I double checked it with diff and it's 100% the same, including types of spaces (narrow non-breaking space vs. regular space for French formatting). I spent a lot of time investigating on how to get the correct response with NumberFormat, so I share the solution.

The idea is based on using the DecimalFormat derived class that alllows for cusomization of many low-level aspects of the currency rendering through DecimalFormatSymbols substitution – these include the currency symbol and grouping separator that have changed in the locales between Java 8 and Java 15. The second one obviously doesn't work again, so I have to apply the substitution on the final string too, which I'm not happy with, of course. But in general it looks for me like a good answer, with one quirk. What do you think?

Here's the code:

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

import java.util.Map;
import java.util.LinkedHashMap;

public class Solution {

    private static DecimalFormat getCurrencyFormat(Locale locale) {
        return (DecimalFormat) NumberFormat.getCurrencyInstance(locale);
    }

    private static DecimalFormat getCurrencyFormat(Locale locale, String sym, Character sep) {
        DecimalFormatSymbols symbols = new DecimalFormatSymbols(locale);
        if (sym != null) symbols.setCurrencySymbol(sym);
        if (sep != null) symbols.setGroupingSeparator(sep);
        DecimalFormat format = (DecimalFormat) NumberFormat.getCurrencyInstance(locale);
        format.setDecimalFormatSymbols(symbols);
        return format;
    }

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

        Map<String, DecimalFormat> formats = new LinkedHashMap<>();
        formats.put("US", getCurrencyFormat(Locale.US));
        formats.put("India", getCurrencyFormat(new Locale("en", "IN"), "Rs.", null));
        formats.put("China", getCurrencyFormat(Locale.CHINA, "\uFFe5", null));
        formats.put("France", getCurrencyFormat(Locale.FRANCE, null, ' '));

        for (Map.Entry<String, DecimalFormat> entry : formats.entrySet()) {
            System.out.println(entry.getKey() + ": "
            + entry.getValue().format(payment).replace("\u202F", " "));
        }
    }
}