1-) Android RMOS - virgülden sonra 4 basamak yapma -> yuvarlayarak

package Classes;

public class MyLibrary {
    public static String bakiyeN4(double value) {
        try{
            value = round(value, 4);
            return String.format("%.4f", value).replace(",",".");
        }catch (Exception ex){
            return  String.format("%.4f", value).replace(",",".");
        }
    }

    public static double round(double value, int places) {
        if (places < 0) throw new IllegalArgumentException();

        long factor = (long) Math.pow(10, places);
        value = value * factor;
        long tmp = Math.round(value);
        return (double) tmp / factor;
    }
}