NumberFormat num1 = NumberFormat.getCurrencyInstance(Locale.US); String us = num1.format(payment); NumberFormat num2 = NumberFormat.getCurrencyInstance(new Locale("en","IN")); String india = num2.format(payment); NumberFormat num3 = NumberFormat.getCurrencyInstance(Locale.CHINA); String china = num3.format(payment); NumberFormat num4 = NumberFormat.getCurrencyInstance(Locale.FRANCE); String france = num4.format(payment);

Java 8 - Not optimal, but hopefully clear:

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

public class Solution {
    public static void main(String[] args) {
        // Scanner - For the "payment" input
        Scanner scanner = new Scanner(System.in);
        double payment = scanner.nextDouble();
        scanner.close();
        
        // Four NumberFormat instances - One for each locale
        NumberFormat f_US = NumberFormat.getCurrencyInstance(Locale.US);
        NumberFormat f_IN = NumberFormat.getCurrencyInstance(new Locale("en", "IN"));
        NumberFormat f_CH = NumberFormat.getCurrencyInstance(Locale.CHINA);
        NumberFormat f_FR = NumberFormat.getCurrencyInstance(Locale.FRANCE);

        // Four System outputs - One for each locale
        System.out.println("US: " + f_US.format(payment));
        System.out.println("India: " + f_IN.format(payment));
        System.out.println("China: " + f_CH.format(payment));
        System.out.println("France: " + f_FR.format(payment));
    }
}

i use Java 7 and it runs, i expect was helping

import java.util.Locale; import java.text.NumberFormat; 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();

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

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

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

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

}

//Indian rupee Rs.1... was causing problem because my code was writing in hindi characters // at first. And second, third, etc. times as well //The next problem, when I thought I found the solution: //Error: I used a non-ASCII character ("₹") - Headshot, thanks Java8 //Finally there is a working solution (I got help from a smarter one, thx for him). I didn't know it "currInr.startsWith" //I hope I could help if someone would have need it

import java.util.; import java.text.; import java.math.*;

public class Solution {

public static void main(String[] args) {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */

    Scanner scanner = new Scanner(System.in);
    String amount = scanner.nextLine();
    scanner.close();

    Currency usd = Currency.getInstance("USD");
    Currency cny = Currency.getInstance("CNY");
    Currency eur = Currency.getInstance("EUR");

    Locale INDIA = new Locale("en", "IN");
    Currency inr = Currency.getInstance("INR");

    NumberFormat inrFormatter = NumberFormat.getCurrencyInstance(INDIA);
    inrFormatter.setCurrency(inr);
    inrFormatter.setMaximumFractionDigits(2);
    inrFormatter.setMinimumFractionDigits(2);

    NumberFormat usdFormatter = NumberFormat.getCurrencyInstance(Locale.US);
    usdFormatter.setCurrency(usd);

    NumberFormat eurFormatter = NumberFormat.getCurrencyInstance(Locale.FRANCE);
    eurFormatter.setCurrency(eur);

    NumberFormat cnyFormatter = NumberFormat.getCurrencyInstance(Locale.CHINA);
    cnyFormatter.setCurrency(cny);

    BigDecimal amt = new BigDecimal(amount);
    String currInr = inrFormatter.format(amt);
    if (!currInr.startsWith("Rs.")) {
        currInr = "Rs." + currInr.substring(1);
    }
    String currUs = usdFormatter.format(amt);
    String currFr = eurFormatter.format(amt);
    String currCn = cnyFormatter.format(amt);

    System.out.println("US: " + currUs);
    System.out.println("India: " + currInr);
    System.out.println("China: " + currCn);
    System.out.println("France: " + currFr);

}

}

If you are having problems using java 15 in this problem switch to java 7. It worked for me that way.