public class ViewSubject extends Application {

private final TableView<Subject> table = new TableView<>();
private final ObservableList<Subject> data
        = FXCollections.observableArrayList();
final HBox hb = new HBox();

private Connection connect = null;
private Statement statement = null;
private final PreparedStatement preparedStatement = null;
private ResultSet resultSet = null;

public static void main(String[] args) {
    launch(args);
}

@Override
public void start(Stage stage) throws ClassNotFoundException, SQLException {

    Scene scene = new Scene(new Group());
    stage.setTitle("Add Subject");
    stage.setWidth(650);
    stage.setHeight(550);
    stage.setResizable(false);

    final Label label = new Label("Subject Details");
    label.setFont(new Font("Calibri", 20));

    TableColumn sub = new TableColumn("Subject Name");
    sub.setMinWidth(350);
    sub.setCellValueFactory(
            new PropertyValueFactory<Subject, String>("subName"));
    sub.setCellFactory(TextFieldTableCell.forTableColumn());
    sub.setOnEditCommit(
            new EventHandler<TableColumn.CellEditEvent<Subject, String>>() {
                @Override
                public void handle(TableColumn.CellEditEvent<Subject, String> t) {
                    ((Subject) t.getTableView().getItems().get(
                            t.getTablePosition().getRow())).setSubName(t.getNewValue());
                }
            }
    );

    TableColumn code = new TableColumn("Subject Code");
    code.setMinWidth(130);
    code.setCellValueFactory(
            new PropertyValueFactory<Subject, String>("subCode"));
    code.setCellFactory(TextFieldTableCell.forTableColumn());
    code.setCellFactory(TextFieldTableCell.forTableColumn());
    code.setOnEditCommit(
            new EventHandler<TableColumn.CellEditEvent<Subject, String>>() {
                @Override
                public void handle(TableColumn.CellEditEvent<Subject, String> t) {
                    ((Subject) t.getTableView().getItems().get(
                            t.getTablePosition().getRow())).setSubCode(t.getNewValue());
                }
            }
    );

    TableColumn rev = new TableColumn("Revision");
    rev.setMinWidth(130);
    rev.setCellValueFactory(
            new PropertyValueFactory<Subject, String>("subRev"));
    rev.setCellFactory(TextFieldTableCell.forTableColumn());
    rev.setCellFactory(TextFieldTableCell.forTableColumn());
    rev.setOnEditCommit(
            new EventHandler<TableColumn.CellEditEvent<Subject, String>>() {
                @Override
                public void handle(TableColumn.CellEditEvent<Subject, String> t) {
                    ((Subject) t.getTableView().getItems().get(
                            t.getTablePosition().getRow())).setSubCode(t.getNewValue());
                }
            }
    );

    table.setItems(data);
    table.getColumns().addAll(sub, code, rev);

    final VBox vbox = new VBox();
    vbox.setSpacing(10);
    vbox.setPadding(new Insets(20, 20, 20, 20));
    vbox.getChildren().addAll(label, table);

    ((Group) scene.getRoot()).getChildren().addAll(vbox);

    stage.setScene(scene);
    stage.show();

    try {
        Class.forName("com.mysql.jdbc.Driver");
        connect = DriverManager
                .getConnection("jdbc:mysql://localhost:3306/project?"
                        + "user=root&password=virus");
        statement = connect.createStatement();

        resultSet = statement
                .executeQuery("select * from subject");
        writeResultSet(resultSet);
    } catch (ClassNotFoundException | SQLException e) {
        throw e;
    } finally {
        close();
    }

}

private void writeResultSet(ResultSet resultSet) throws SQLException {

    while (resultSet.next()) {

        String subname = resultSet.getString("subname");
        String code = resultSet.getString("subcode");
        String rev = resultSet.getString("subrev");

        data.add(new Subject(subname, code, rev));
    }
}

private void close() {
    try {
        if (resultSet != null) {
            resultSet.close();
        }
        if (statement != null) {
            statement.close();
        }
        if (connect != null) {
            connect.close();
        }
    } catch (SQLException e) {

    }
}
}

public class Subject {

    private final SimpleStringProperty sub;
    private final SimpleStringProperty code;
    private final SimpleStringProperty rev;

    Subject(String subName, String subCode, String subRev) {
        this.sub = new SimpleStringProperty(subName);
        this.code = new SimpleStringProperty(subCode);
        this.rev = new SimpleStringProperty(subRev);
    }

    public String getSubName() {
        return sub.get();
    }

    public void setSubName(String subName) {
        sub.set(subName);
    }

    public String getSubCode() {
        return code.get();
    }

    public void setSubCode(String subCode) {
        code.set(subCode);
    }

    public String getSubRev() {
        return rev.get();
    }

    public void setSubRev(String subRev) {
        rev.set(subRev);
    }
}