@FXML
    private ProgressBar progress;
...
    double size = cardFile.getList().size();
    double counter = 0;
    for(CardFileRecord cfr:cardFile.getList())
    {
        counter++;
        progress.progressProperty().set(counter/size);   
    }

void fillContractId(final CardFile cardFile) throws SQLException 
    {
        Connection conn = db.getConnection();
        final PreparedStatement ps = conn.prepareStatement("...");        
        Task<Integer> task = new Task<Integer>() 
        {
            @Override
            protected Integer call() throws Exception 
            {
                double size = cardFile.getList().size();
                double counter = 0;
                for(CardFileRecord cfr:cardFile.getList())
                {
                    ps.setString(1, cfr.getCardNumber());
                    ResultSet rs = ps.executeQuery();
                    if (rs.next())
                    {
                        cfr.setContractId(rs.getString(1));
                    }            
                    updateProgress(counter,size);
                    Thread.sleep(20);
                }
                return  0;
            }
        };
        progress.progressProperty().bind(task.progressProperty());
        new Thread(task).start();
        
    }