JTAble -delete Row

Question

Hallo, how casn i force my table to repaint?
in the following code i ty to delete a row in a JTable and it works but the result is not visible( i know that it works because of the ArrayIndexOutOfBoudsException occuring when i select a higher index than rows are left)
HERE the code:
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TestIt extends JFrame
implements ListSelectionListener {
private JTable table;
private DefaultTableModel model;
public TestIt() {
this.setSize(800, 600);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.table = new JTable();
this.makeModel();
this.table.getSelectionModel().addListSelectionListener(this);
JScrollPane tablepane = new JScrollPane(table);
table.setModel(model);
tablepane.setViewportView(table);
JButton delButton = new JButton("delete");
delButton.setActionCommand("delete");
delButton.addActionListener(new DelListener());
JButton agButton = new JButton("again");
agButton.setActionCommand("again");
agButton.addActionListener(new AgListener());
JPanel buttonPane = new JPanel();
buttonPane.add(delButton);
buttonPane.add(agButton);
Container contentPane = getContentPane();
contentPane.add(tablepane, BorderLayout.NORTH);
contentPane.add(buttonPane, BorderLayout.SOUTH);
public void again(){
this.table.removeAll();
this.makeModel();
table.setModel(model);
this.show();
public void valueChanged(ListSelectionEvent e) {
private void makeModel() {
this.model = new DefaultTableModel() {
public boolean isCellEditable(int row, int column) {
return false;
public int getColumnCount() {
return 3;
public int getRowCount() {
return 6;
public Object getValueAt(int row, int col) {
String data = "";
if (col == 0) {
data = "first";
if (col == 1) {
data = "second";
if (col == 2) {
data = "third";
return data;
private void delRow(int row) {
this.model.removeRow(row);
this.show();
class DelListener
implements ActionListener {
public void actionPerformed(ActionEvent e) {
int index = table.getSelectedRow();
if (index == -1) {
Toolkit.getDefaultToolkit().beep();
return;
delRow(index);
class AgListener
implements ActionListener {
public void actionPerformed(ActionEvent e) {
again();
public static void main(String args[]) {
JFrame frame = new TestIt();
frame.setVisible(true);
}

Answer 1

OK the problem was your model, that wasn't filled.
I've changed you code to make it work, play around with it and modify it to your demandsimport java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TestIt extends JFrame implements ListSelectionListener {
    private JTable table;
    private DefaultTableModel model;
    public TestIt() {
        this.setSize(800, 600);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.table = new JTable();
        this.makeModel();
        this.table.getSelectionModel().addListSelectionListener(this);
        JScrollPane tablepane = new JScrollPane(table);
        table.setModel(model);
        tablepane.setViewportView(table);
        JButton delButton = new JButton("delete");
        delButton.setActionCommand("delete");
        delButton.addActionListener(new DelListener());
        JButton agButton = new JButton("again");
        agButton.setActionCommand("again");
        agButton.addActionListener(new AgListener());
        JPanel buttonPane = new JPanel();
        buttonPane.add(delButton);
        buttonPane.add(agButton);
        Container contentPane = getContentPane();
        contentPane.add(tablepane, BorderLayout.NORTH);
        contentPane.add(buttonPane, BorderLayout.SOUTH);
        show();
    public void again() {
        this.makeModel();
        table.setModel(model);
        model.fireTableDataChanged();
    public void valueChanged(ListSelectionEvent e) {
    private void makeModel() {
        this.model = new DefaultTableModel();
        model.setColumnIdentifiers(new Object[]{"1","2","3"});
        for (int i = 0; i < 5; i++){
             model.addRow(new Object[]{"first","second","third"});     
        model.fireTableDataChanged();
    private void delRow(int row) {
        this.model.removeRow(row);
          model.fireTableDataChanged();
    class DelListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            int index = table.getSelectedRow();
            if (index == -1) {
                Toolkit.getDefaultToolkit().beep();
                return;
            delRow(index);
    class AgListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            again();
    public static void main(String args[]) {
        JFrame frame = new TestIt();
        frame.setVisible(true);
}