Вывод информации из HashMap в javaFxTreeTableView

Я вывожу информацию в HashMap из postgresql теперь информацию из HashMap мне нужно вывести в treetableview java fx написал вот такой вот код:

 private TreeTableView<Expences> expences = new TreeTableView<Expences>();
@FXML TreeTableColumn<Expences, String> treeTableColumn = new TreeTableColumn<>("Имя счета");
@FXML TreeTableColumn<Expences, String> treeTableColumn1 = new TreeTableColumn<>("Код");
@FXML TreeTableColumn<Expences, String> treeTableColumn2 = new TreeTableColumn<>("Итог");


@FXML
void initialize() {
    treeTableColumn.setCellValueFactory(new TreeItemPropertyValueFactory<>("expens"));
    treeTableColumn1.setCellValueFactory(new TreeItemPropertyValueFactory<>("code"));
    treeTableColumn2.setCellValueFactory(new TreeItemPropertyValueFactory<>("total"));

    expences.getColumns().add(treeTableColumn);
    expences.getColumns().add(treeTableColumn1);
    expences.getColumns().add(treeTableColumn2);

   }

   public void HashMapIn (){
    String MapInf = "SELECT category, name_score, defference FROM consolid";
     Map<String, List<String>> results = new HashMap<>();
    try {
        Connection Map = DatabaseHandler.getDbConnection();
        PreparedStatement FirstMap = Map.prepareStatement(MapInf);
        ResultSet rs = FirstMap.executeQuery();
        while (rs.next()){
            String category = rs.getString(1);
            String name_score = rs.getString(2);
            String difference = rs.getString(3);

                List<String> score_names = new ArrayList<>();
                score_names.add(name_score);
                score_names.add(difference);
                results.put(category, score_names);

            TreeItem infor = new TreeItem(new Expences(name_score, difference));
            TreeItem finall = new TreeItem(new Expences(category));
            finall.getChildren().add(infor);
            expences.setRoot(finall);
        }
    }catch (SQLException throwables) {
        throwables.printStackTrace();
    }
    System.out.println(results);
}
}

Но в итоге получаю пустые колонки