public static void connect(){
    try {
    Class.forName("oracle.jdbc.driver.OracleDriver");

     con = DriverManager.getConnection(
            "jdbc:oracle:thin:@localhost:1521:xe ", login, pass);
            stmt = con.createStatement();
            System.out.println("pomyslnie polaczono");

        } catch (Exception e) {
            e.printStackTrace();

        }
    }

public static void dodaj(){
         try {
            String QueryDodaj = "{call DODAJ_SALE (?,?)}";
            pst = con.prepareCall(QueryDodaj);
            pst.setString(1, "22");
            pst.setString(2, "2");
            pst.executeQuery();

        } catch (Exception ex) {

        }
        }