Java DecimalFormat format decimal to String like "123456.789"

import java.text.DecimalFormat;

public class Main {
  public static void main(String[] args) throws Exception {
    DecimalFormat myFormatter = new DecimalFormat("###.###");
    String output = myFormatter.format(123456.789);
    System.out.println(output);/*from   w w w.  jav  a2  s . c  om*/
  }
}