public static void main(String[] args) {
        HashMap<String, Object> mapa = new HashMap<>();
        Integer integer;
        Double penetration;
        integer = retInt();
        mapa.put("act", integer);
//        penetration = (double)mapa.get("act");
        penetration = (double) (int) mapa.get("act");
    }

    public static Integer retInt() {
        return 10;
    }