public class HoverCell extends TableCell<Person, String> {

  public HoverCell(StringProperty hoverProperty) {
    setOnMouseEntered(e -> hoverProperty.set(getItem()));
    setOnMouseExited(e -> hoverProperty.set(null));
  }

  @Override
  protected void updateItem(String item, boolean empty) {
    super.updateItem(item, empty);
    setText(empty ? null : item);
  }
}

firstNameCol.setCellFactory(TextFieldTableCell.forTableColumn());
firstNameCol.setOnEditCommit(event -> {
  String[] row = event.getRowValue();
  row[index] = event.getNewValue();
});
 

public void editTable(){
 
  nameColumn.setCellFactory(TextFieldTableCell.forTableColumn());
  qtyColumn.setCellFactory(TextFieldTableCell.forTableColumn(new IntegerStringConverter()));
  expColumn.setCellFactory(TextFieldTableCell.forTableColumn());
  mrpColumn.setCellFactory(TextFieldTableCell.forTableColumn(new DoubleStringConverter()));
  amtColumn.setCellFactory(TextFieldTableCell.forTableColumn(new DoubleStringConverter()));
  final int[] ad = {0};
 
  nameColumn.setOnEditCommit(new EventHandler<TableColumn.CellEditEvent<TableData, String>>() {
    @Override
    public void handle(TableColumn.CellEditEvent<TableData, String> event) {
      ((TableData)event.getTableView().getItems().get(event.getTablePosition().getRow())).setName(event.getNewValue());
      //TablePosition tp = tableView.getFocusModel().getFocusedCell();
 
    }
  });
  qtyColumn.setOnEditCommit(new EventHandler<TableColumn.CellEditEvent<TableData, Integer>>() {
    @Override
    public void handle(TableColumn.CellEditEvent<TableData, Integer> event) {
      ((TableData)event.getTableView().getItems().get(event.getTablePosition().getRow())).setQty(event.getNewValue());
 
      ad[0] = event.getTableView().getItems().get(event.getTablePosition().getRow()).getQty();
      dynCal();
 
 
    }
  });
  expColumn.setOnEditCommit(new EventHandler<TableColumn.CellEditEvent<TableData, String>>() {
    @Override
    public void handle(TableColumn.CellEditEvent<TableData, String> event) {
      ((TableData)event.getTableView().getItems().get(event.getTablePosition().getRow())).setExp(event.getNewValue());
    }
  });
  mrpColumn.setOnEditCommit(new EventHandler<TableColumn.CellEditEvent<TableData, Double>>() {
    @Override
    public void handle(TableColumn.CellEditEvent<TableData, Double> event) {
      event.getTableView().getItems().get(event.getTablePosition().getRow()).setMrp(event.getNewValue());
 
    }
  });
 
 
 
}