FormatNumber.java

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

public class FormatNumbers {
  public static void main(String []args) {
    double number = 123456.78;
         
    NumberFormat usFormatter = NumberFormat.getInstance(new Locale("en", "US"));
        
    System.out.println(usFormatter.format(number));
    // => 123,456.78 (American format)
        
    NumberFormat frenchFormatter = NumberFormat.getInstance(new Locale("fr", "FR"));
        
    System.out.println(frenchFormatter.format(number));
    // => 123 456,78 (French format)
          
    NumberFormat thaiFormatter = 
      NumberFormat.getInstance(new Locale("th", "TH", "TH"));
        
    System.out.println(thaiFormatter.format(number));
    // => ๑๒๓,๔๕๖.๗๘ (Thai format) 
 }
}