Question on retrieving data from a JTable

Question

I have created a custom table model by following some examples. I will problably remove this though and just use the default model. I just wanted to find out a couple of things about the code. If the cells update automatically, why is there a setValueAt method? I dont see anywhere in the listener where this method is used.
     public class InteractiveTableModelListener implements TableModelListener {
     public void tableChanged(TableModelEvent evt) {
      if (evt.getType() == TableModelEvent.UPDATE) {
          int column = evt.getColumn();
          int row = evt.getFirstRow();
          System.out.println("row: " + row + " column: " + column);
          table.setColumnSelectionInterval(column + 1, column + 1);
          table.setRowSelectionInterval(row, row);
     }My second question is about retrieving the data. I need to get the data out of the table, create an object from it and send it too my database. This is my getValueAt method
     public Object getValueAt(int row, int column) {
         UpdateEventSetGet record = (UpdateEventSetGet)dataVector.get(row);
         switch (column) {
             case POSITION_INDEX:
                return record.getPosition();
             case FNAME_INDEX:
                return record.getFirstname();
             case LNAME_INDEX:
                return record.getLastname();
             case TIME_INDEX:
                return record.getTime();
             default:
                return new Object();
     }I just have a couple of questions about this. What is the best way to loop in order to retrieve all of the data from the table, as i presume the above method only retrieves one cell. And secondly, my constructor in my set/get class does not require any parameters (this is how it was for some reason)
     public UpdateEventSetGet() {
     position = "";
     firstName = "";
     lastName = "";
     timeSet = "";
     }The way it is above, can i retrieve four objects (as that what the getValueAt methods returns), pass them into this constructor to end up with just 1 object?
cheers for the help

Answer 1

hope this helps
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.WindowConstants;
import javax.swing.table.DefaultTableModel;
* @author dayananda.bv
public class TableModelTest extends JFrame implements ActionListener{
    private JButton jButton1;
    private JScrollPane jScrollPane1;
    private JTable jTable2;
    Vector vec = new Vector();
    DefaultTableModel dtm;
    /** Creates a new instance of TableModelTest */
    public TableModelTest() {
        jButton1 = new JButton("Get Data");
        jButton1.addActionListener(this);
        jTable2 = new JTable();
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        jButton1.setText("jButton1");
        int j = 0;
        for(int i=0;i<10;i++){
        Vector v = new Vector();
            v.addElement(j++);
            v.addElement(j++);
            v.addElement(j++);
            v.addElement(j++);   
            vec.addElement(v);
        Vector colNames = new Vector();
        colNames.addElement("A");
        colNames.addElement("B");
        colNames.addElement("C");
        colNames.addElement("D");
        dtm = new DefaultTableModel(vec, colNames);
        jTable2.setModel(dtm);
        jScrollPane1 = new JScrollPane(jTable2);
        getContentPane().add(jScrollPane1,BorderLayout.CENTER);
        getContentPane().add(jButton1,BorderLayout.SOUTH);
        pack();
        setVisible(true);
    public void actionPerformed(ActionEvent e){
        Vector data = dtm.getDataVector();
        for(int i=0;i<data.size();i++){
            Vector row = (Vector)data.get(i);
            System.out.println(row);
    public static void main(String args[]){
        new TableModelTest();
}