How to Insert row data from database into specific columns of a JTable?

I have written a GUI Java program that manages a MySQL database. The user selects which columns (which tables and columns will be selected from the database) he/she wants to populate the JTable with.

I hard-coded the column names for the JTable so even if the user chooses to only display the data from a subset of columns, all of the column-names will be visible.

The problem is that when the user chooses columns in a different order than my JTable is anticipating, the data gets displayed in the wrong column.. It's a bit hard to explain so here's a screenshot of the genre data being loaded into the length column:

tableGenerator class:

package gui;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Vector;

public class TableGenerator
{

    private ArrayList columnNames = new ArrayList();
    private ArrayList data = new ArrayList();
    private Vector columnNamesVector = new Vector();
    private Vector dataVector = new Vector();
    private int columns = 0;
    private int rows = 0;

    @SuppressWarnings("unchecked")
    public TableGenerator(ResultSet rs)
    {
        try{
            ResultSetMetaData md = rs.getMetaData();
            columns = md.getColumnCount();
            //  Get column names

                columnNames.add("Title");
                columnNames.add("Year");
                columnNames.add("Length");
                columnNames.add("Genre");
                columnNames.add("Actor");
                columnNames.add("Producer");
                columnNames.add("Director");
                columnNames.add("Writer");

            //  Get row data
            while (rs.next())
            {
                ArrayList row = new ArrayList(columnNames.size());

                for (int i = 1; i <= columns; i++)
                {
                        row.add(rs.getObject(i));
                }
                data.add( row );
                rows++;
            }
        }
        catch (SQLException e)
        {
            System.out.println( e.getMessage() );
        }

        // Create Vectors and copy over elements from ArrayLists to them
        // Vector is deprecated but I am using them in this example to keep 
        // things simple - the best practice would be to create a custom defined
        // class which inherits from the AbstractTableModel class


        for (int i = 0; i < data.size(); i++)
        {
            ArrayList subArray = (ArrayList)data.get(i);
            Vector subVector = new Vector();
            for (int j = 0; j < subArray.size(); j++)
            {
                subVector.add(subArray.get(j));
            }
            dataVector.add(subVector);
        }

        for (int i = 0; i < columnNames.size(); i++ )
            columnNamesVector.add(columnNames.get(i));
        }

    public Vector getColumns(){
        return columnNamesVector;
    }
    public Vector getData(){
        return dataVector;
    }
    public ArrayList getColumnNames(){
        return columnNames;
    }
    public int getNumberOfRows(){
        return rows;
    }

}

I'm using the DefaultTableModel with some modifications.. :

model = new DefaultTableModel(rows, columns){

    private static final long serialVersionUID = 1L;

    @Override
    public boolean isCellEditable(int row, int column) {
        return false;
    }

    @Override
    public Class<?> getColumnClass(int column) {
        if (column < classes.length) 
            return classes[column];
        return super.getColumnClass(column);

    };};