Formatting Numbers and Currency : Formatter « Utility Classes « SCJP

1. SCJP
2. Utility Classes
3. Formatter

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

public class MainClass{
    public static void main(String[] argv){
        Locale[] locales = { Locale.US, Locale.ITALY };
        for (Locale loc:locales) {
          NumberFormat f = NumberFormat.getInstance(loc);
          String formattedNumber = f.format(111123456.78911);
          System.out.format("%15s: %s\n", loc.getDisplayCountry(),
                               formattedNumber);
        }

    }
}

United States: 111,123,456.789
          Italy: 111.123.456,789