Java tutorial
import java.text.DecimalFormat; public class Main { public static void main(String[] argv) throws Exception { DecimalFormat formatter = new DecimalFormat("##E0"); String s = formatter.format(-1234.567); System.out.println(s); s = formatter.format(-123.4567); System.out.println(s); s = formatter.format(-12.34567); System.out.println(s); } }