See new row in JTable

Question

Hi
I haven't found this one yet:
How to see new row in an already visible JTable after ((DefaultTableModel)JTable.getModel()).setRowCount(x + 1...n) or any other statement (...addRow(...), insertRow(....), ...?) ?
(Using J2SE 1.5(beta) on Win XP)
Any help very appreciated!

Answer 1

Use a DefaultTableModel. Then call model.addRow(), etc and the table will update.
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.util.Vector;
public class TableRowAdderTest extends JFrame{
    private DefaultTableModel model;
    public TableRowAdderTest() {
        buildGUI();
    private void buildGUI() {
        JPanel mainPanel = (JPanel) getContentPane();
        mainPanel.setLayout(new BorderLayout());
        mainPanel.add(buildTablePanel(),BorderLayout.CENTER);
        mainPanel.add(buildButtonPanel(), BorderLayout.SOUTH);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);
    private JPanel buildButtonPanel() {
        JPanel retPanel = new JPanel();
        JButton addButton = new JButton("Add");
        addButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                addRow();
        retPanel.add(addButton);
        return retPanel;
    private void addRow() {
        Vector rowVector = new Vector();
        rowVector.add("data 1");
        rowVector.add("data 2");
        rowVector.add("data 3");
        model.addRow(rowVector);
    private JPanel buildTablePanel() {
        JPanel retPanel = new JPanel();
        model = new DefaultTableModel();
        model.setColumnIdentifiers(new String[]{"Column 1","Column 2", "Column 3"});
        JTable table = new JTable(model);
        JScrollPane jsp = new JScrollPane(table);
        retPanel.add(jsp);
        return retPanel;
    public static void main(String[] args) {
        new TableRowAdderTest();
}This same approach will work for inserting rows, altering cell values, etc.
Cheers
DB