[android help] Formatting Double with two dp

From my decimalForm method below, i want to convert double value 7777.54 to 7 777,54 but i am getting 7 777 54. what have missed ? result should be 7 777,54

public static String decimalForm(double value){

            DecimalFormat df = new DecimalFormat("#,###,###.00");
            String formatted_value = df.format(value).replaceAll(",", " ").replace(".", ",");

            return formatted_value;
        }

.

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