private void loadPlattformar() {
        ArrayList<String> altemp = new ArrayList<>();
        ArrayList<Plattform> al = new ArrayList<>();
        try {
            String query = "select pid from plattform";
            altemp = DB.fetchColumn(query);
        } catch (InfException e) {
            e.getMessage();
        }

        for (String st : altemp) {
            al.add(new Plattform(Integer.parseInt(st)));
        }

        cbPlattformar.removeAllItems();
        for (Plattform pt : al) {
            cbPlattformar.addItem(pt);
        }
    }