Populating TableView with data from database.Failed to set rows

Question

I hit a wall when i retrieve data from database.I managed to get column names into my table which is ok and works as it shoud.

Bud when i try to add rows i find that

Answer 1

You will need to set some Factories, if you want to get this working.

In the example below, I do not get elements from a SQL server, but I believe will be enough for you to see how to accomplish this.

Note that it just fill with sequential values, but still it will have as many columns as the header in the method createTable().

package table;

import com.sun.javafx.collections.ObservableListWrapper;
import javafx.application.Application;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableRow;
import javafx.scene.control.TableView;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;
import javafx.util.Callback;

import java.util.Collections;
import java.util.List;

public class TableDemo extends Application {
    private int rowIndex = 0;
    private int elementIndex = 0;
    final TableView tableView = new TableView();
    ObservableList dataRows = FXCollections.observableArrayList();
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) {
        FlowPane pane = new FlowPane();
        tableView.setRowFactory(new CountingRowFactory());
        createTable();
        pane.getChildren().add(tableView);
        List items = Collections.singletonList(new Object());
        tableView.setItems(dataRows);
        stage.setScene(new Scene(pane));
        stage.show();
    }

    private TableColumn createColumn(String header) {
        TableColumn column = new TableColumn(header);
        column.setCellFactory(new CellFactory());
        column.setCellValueFactory(new CountingValueFactory());
        return column;
    }

    private static class CellFactory implements Callback {
        @Override
        public Object call(Object column) {
            return new TableCell() {
                @Override
                protected void updateItem(Object o, boolean b) {
                    super.updateItem(o, b);
                    setText(String.valueOf(o));
                }
            };
        }
    }

    private class CountingRowFactory implements Callback {
        @Override
        public Object call(Object o) {
            TableRow row = new TableRow();
            row.setUserData(rowIndex);
            rowIndex++;
            return row;
        }
    }

    private class CountingValueFactory implements Callback {
        @Override
        public Object call(Object o) {
            SimpleIntegerProperty property = new SimpleIntegerProperty(elementIndex);
            elementIndex++;
            return property;
        }
    }
    public void createTable(){
        String[] header  = {"a","b","c","d","e","f","g","h"};
        for(String s: header)
            tableView.getColumns().add(createColumn(s));
        for(int i=0;i<30;i++){
            String[] temp  = header;
            for(int j=0;j