Java String.format()

I have a string and I want to format it in a custom way.
This is my String:

String amount = "355128000";

I want it to be formatted like this way:

String formattedAMount = "3 551 280,00"

With a space after first number and a group of 3 numbers and a comma at the end before two nubmers

>Solution :

You can create an instance of NumberFormatter and specify options:

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

public class NumberFormatExample {

    private static final DecimalFormat numberFormatter;

    static {
        numberFormatter = (DecimalFormat) NumberFormat.getInstance(Locale.US);

        // Configure/override
        DecimalFormatSymbols symbols = numberFormatter.getDecimalFormatSymbols();
        symbols.setGroupingSeparator('\u00a0'); // non-breaking space
        symbols.setDecimalSeparator(',');
        numberFormatter.setDecimalFormatSymbols(symbols);
        numberFormatter.setMinimumFractionDigits(2);
    }

    public static String formatNumber(String rawNumber) {
        return numberFormatter.format(Long.parseLong(rawNumber) / 100d);
    }

    public static void main(String[] args) {
        String amount = "355128000";
        System.out.println(formatNumber(amount)); // 3 551 280,00
    }
}