monday.setCellFactory(new Callback<TableColumn<DaySchedule, Lesson>, TableCell<DaySchedule, Lesson>>(){
                  @Override
                 public TableCell<DaySchedule, Lesson> call(TableColumn<DaySchedule, Lesson> param) {
                    TableCell<DaySchedule, Lesson> cell = new TableCell<DaySchedule, Lesson>(){
                       @Override
                     protected void updateItem(Lesson item, boolean empty) {
                    if (item != null) {
                        Label info = new Label(item.getSubjectName()+item.getSubjectType()+item.getRoomNumber()+item.getLecturer());
                        info.setTextAlignment(TextAlignment.CENTER);
                               setGraphic(info);
                    }
                      }
                   };

                    return cell;
              }

              });