decimal formatter

__Utils.java

    /**
     * Decimal Localization Format, like #,###.## for US or #.###,## for ID
     *
     * @param Numobj
     * @return
     */
    //TODO: change to automatic localization detection
    public static String DecimalFormater(Object Numobj) {

        Object obj = String.valueOf(Numobj).matches("-?\\d+(\\.\\d+)?") ? Numobj : 0.00;
        String digitPattern = Locale.getDefault().toString().equals("in_ID") ? "#.###.###,##" : "#,###,###.##";

        NumberFormat formatter = NumberFormat.getNumberInstance(Locale.getDefault());
        formatter.setRoundingMode(RoundingMode.HALF_EVEN);
        formatter.setMaximumFractionDigits(2);
        formatter.setMinimumFractionDigits(2);

        return formatter.format(Float.parseFloat(obj.toString()));
    }