public ArrayList<Grad> gradovi() {
        ArrayList<Grad> rez = new ArrayList<>();
        try {
            ResultSet rsGrad = dajGradoveUpit.executeQuery();
            while (rsGrad.next()) {
                Grad grad = new Grad(rsGrad.getInt(1), rsGrad.getString(2), rsGrad.getInt(3), null);
                Drzava drzava = null;
                ResultSet rsDrzava = dajDrzaveUpit.executeQuery();
                int drzavaId = rsGrad.getInt(4);
                while (rsDrzava.next()) {
                    if ( rsDrzava.getInt(1) == drzavaId) {
                        drzava = new Drzava(rsDrzava.getInt(1), rsDrzava.getString(2), grad);
                    }
                }
                grad.setDrzava(drzava);
                rez.add(grad);
            }
            return rez;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }