Writing data to JavaFX Tableview

Question

I have never used tableview before and I am quite new to with Java and JavaFX. I tried to mirror an example but since the data is coming from a db client created in house I couldn't copy it exactly. Anyway, my data is going into the table but its entering as what looks like a csv data and each column is not getting put into its respective column. Here is a screenshot to clarify my question:

Getting columns here

   for (Column col : drs.getColumns()){
        TableColumn tblCol = new TableColumn(col.getName());
        tblCol.setCellValueFactory(new Callback<CellDataFeatures<ObservableList,String>,ObservableValue<String>>(){
            public ObservableValue<String> call(CellDataFeatures<ObservableList, String> p) {
                return new SimpleStringProperty(p.getValue().toString());
            }
        });
         table.getColumns().addAll(tblCol);
    }

Getting the rows here:

while (drs.hasNextRow()) {
    ObservableList<String> row = FXCollections.observableArrayList();
    for (int i = 0; i < drs.getColumns().length; i++) {
        row.add(drs.getNextRow().getItem(i) + "");
    }
    data.add(row);
}

And here is where I fail at sending the data to the table.

table.setItems(data);
System.out.println("dis is data: " +data);

the data prints like so:

dis is data: [[data, data, data....], [data, data, data....], [data, data, data....]]

It takes each [row] and puts it into each column for each record. I am assuming I need the data to look like:

[[data], [data], [data]....[data]], [[data], [data], [data]....[data]], [[data], [data], [data]....[data]]

    } catch(Exception e){
        e.printStackTrace();
        System.out.println("everything is broken");
    }
}

So, I am lost. I don't know what I am doing and I'd appreciate any help that you can offer me.

fabian · Accepted Answer · 2016-04-07 17:21:28Z

1

In TableView all the data in a row is associated with a item. The TableColumn.cellValueFactory is used to select the "part" of a item that should be shown in the column. Therefore you should use it to select the value:

TableView<ObservableList<String>> table = ...
int index = 0;
for (Column col : drs.getColumns()) {
    final int columnIndex = index++;
    TableColumn<ObservableList<String>, String> tblCol = new TableColumn(col.getName());
    tblCol.setCellValueFactory(new Callback<CellDataFeatures<ObservableList<String>, String>, ObservableValue<String>>(){
        public ObservableValue<String> call(CellDataFeatures<ObservableList, String> p) {
            return Bindings.stringValueAt(p.getValue(), columnIndex);
        }
    });
    table.getColumns().add(tblCol);
}

Here the Bindings.stringValueAt is used to select the element form the ObservableList.

Also you need to use one row per row:

while (drs.hasNextRow()) {
    ObservableList<String> row = FXCollections.observableArrayList();
    Row sourceRow = drs.getNextRow();
    for (int i = 0; i < drs.getColumns().length; i++) {
        row.add(Objects.toString(sourceRow.getItem(i)));
    }
    data.add(row);
}

answered Apr 7, 2016 at 17:21

fabian

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2 Comments

anshanno Over a year ago

Thank you so much! I got it working however now when I enter another query it appends the new query to the right of the old one in the table.

fabian Over a year ago

@anshanno: I don't know what your input data structure is, but when in doubt you can clear the items and columns of the TableView before setting new data...

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