public class Format {



    public static String numberFormat(int value) {

        NumberFormat myFormatter = NumberFormat.getInstance();

        return myFormatter.format(value);

    }



    public static String decimalFormat(String pattern, int value) {

        DecimalFormat myFormatter = new DecimalFormat(pattern);

        return myFormatter.format(value);

    }



    public static void main(String[] args) {

        System.out.println(Format.readableFileSize(1000000));

    }





    public static String readableFileSize(long size) {

        if (size <= 0) return "0";

        final String[] units = new String[]{"B", "KB", "MB", "GB", "TB"};

        int digitGroups = (int) (Math.log10(size) / Math.log10(1000));

        return new DecimalFormat("#,##0.#").format(size / Math.pow(1000, digitGroups)) + " " + units[digitGroups];



    }

}

var speedCheck = (function (start) {

    var end = new Date().getTime();

    var time = (end - start);

    alert("Time(millisec) : " + time);

});