TableModel linking with JTable

I'm working from the tutorial at:

http://www.netbeans.org/kb/articles/mysql-client.html#db08

But I've slightly changed things.  Right now I'm getting a run-time
NullPointerException probably due to the JTable carsTable.setModel()
method returning an empty array.

I suppose I should print out the array and see what's in it.

However, if I could get a pointer for:


InsertTable.initComponents(){

        ...

        ResultSet resultSet = MyDBConnection.getInstance().getCars();
        //what do I do with resultSet?
        carTable.setModel(CarTableModel.getInstance());
        jScrollPane1.setViewportView(carTable);

        ...
}


I've checked out the underlying db from MySQL and it looks fine.  I
suppose that I could drop the GUI and just print some queries, but I've
already done that in a previous project and don't think that's the
problem.

I suppose one thing I could do would be to print the contents of
CarTableModel, but I'm reasonably sure that they're ok:



thufir@arrakis:~$
thufir@arrakis:~$ cat NetBeansProjects/cars/src/a00720398/model/
CarTableModel.java
package a00720398.model;

import a00720398.controller.*;
import java.sql.*;
import java.util.logging.*;
import javax.swing.table.*;

@SuppressWarnings({"serial", "unchecked"})
public class CarTableModel extends DefaultTableModel {

    private static final TableModel INSTANCE = new CarTableModel();

    private CarTableModel() {
        try {

            init();
        } catch (SQLException ex) {
            Logger.getLogger(CarTableModel.class.getName()).log
(Level.SEVERE, null, ex);
        }

    }

    public static TableModel getInstance() {
        return INSTANCE;   //maybe put some System.out.println here
    }

    public void init() throws SQLException {
        dataVector.add(MyDBConnection.getInstance().getCars());
    }
}
thufir@arrakis:~$






thanks,


Thufir