Methods for preserving decimals in java, el expressions

In Java:

Import java.math.bigdecimal;import Java.text.decimalformat;import java.text.numberformat;public class format {    Double F = 111231.5585;    public void M1 () {        BigDecimal bg = new BigDecimal (f);        Double f1 = Bg.setscale (2, bigdecimal.round_half_up). doublevalue ();        System.out.println (f1);    }    /**     * DecimalFormat conversion is easiest     *    /public void m2 () {        decimalformat df = new DecimalFormat ("#.00");        System.out.println (df.format (f));   /**     * String.Format printing easiest */public    void M3 () {        System.out.println (string.format ("%.2f", f));    } Public    void M4 () {        numberformat nf = numberformat.getnumberinstance ();        Nf.setmaximumfractiondigits (2);        System.out.println (nf.format (f));    public static void main (string[] Args) {        format f = new format ();        F.M1 ();        F.M2 ();        F.M3 ();        F.M4 ();    }}

Results:
111231.56
111231.56
111231.56
111,231.56----------------------------------------------------------------------------------------------------- -------------------------------------------------------an El Expression:import <%@ taglib prefix= "fmt" uri= "http://java.sun.com/jsp/jstl/fmt"%><fmt:formatnumber value= "${}" pattern= "#.00"/>

　

<fmt:formatnumber value= "${num}" maxfractiondigits= "0"/>

<fmt:formatnumber value= "${failallsum}" pattern= "#,###.##"/>

Methods for preserving decimals in java, el expressions