JTable not displaying column Heads

Question

The following JPanel was constructed using JBuilder 7 (a horrendous piece of software) and is in GridBagLayout. I'm attempting to display the contents of a table using JTable, and whilst it displays the rows it doesn't display the columnHeads! What am I doing wrong?
import java.sql.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.text.*;
public class BeginTask extends JPanel implements ActionListener{
private boolean dbupdated;
private MainFrame main;
private JLabel jLabel1 = new JLabel();
private JLabel jLabel2 = new JLabel();
private JTable jTable1 = new JTable();
private JButton jButton1 = new JButton();
private JButton jButton2 = new JButton();
private GridBagLayout gridBagLayout1 = new GridBagLayout();
private Connection connection;
private String url = "jdbc:odbc:bapers";
private String username = "";
private String password = "";
public BeginTask(MainFrame ma) throws SQLException{
main = ma;
logon();
drawTable();
try {
jbInit();
catch(Exception ex) {
ex.printStackTrace();
void jbInit() throws Exception {
jLabel1.setFont(new java.awt.Font("Dialog", 1, 18));
jLabel1.setText("Begin Task");
this.setLayout(gridBagLayout1);
jLabel2.setText("Select Task, and press OK.");
jButton1.setText("OK");
jButton2.setText("CANCEL");
jButton1.addActionListener(this);
jButton2.addActionListener(this);
this.add(jButton1, new GridBagConstraints(0, 3, 1, 1, 0.0, 0.0
,GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(12, 117, 14, 0), 94, 8));
this.add(jButton2, new GridBagConstraints(1, 3, 1, 1, 0.0, 0.0
,GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(19, 43, 7, 119), 62, 8));
this.add(jTable1, new GridBagConstraints(0, 2, 2, 1, 1.0, 1.0
,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(12, 25, 0, 22), 522, 281));
this.add(jLabel2, new GridBagConstraints(0, 1, 2, 1, 0.0, 0.0
,GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 181, 0, 226), 13, 6));
this.add(jLabel1, new GridBagConstraints(0, 0, 2, 1, 0.0, 0.0
,GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(29, 202, 0, 251), 19, 17));
public void actionPerformed(ActionEvent e) {
if (e.getSource() == jButton1) {
if (dbupdated == true)
JOptionPane.showMessageDialog(null, "The database has been updated to show that the user has begun the task selected.");
else if (dbupdated == false)
JOptionPane.showMessageDialog(null, "The database has not been updated.");
else if (e.getSource() == jButton2) {
BapProcMain bpm = new BapProcMain(main);
main.redisplay(bpm);
public void logon() {
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
connection = DriverManager.getConnection(url, username, password);
catch (ClassNotFoundException cnfex) {
System.err.println("Failed to load the JDBC/ODBC driver.");
cnfex.printStackTrace();
System.exit(1);
catch (SQLException sqlex) {
System.err.println("Unable to connect (SQL error)");
sqlex.printStackTrace();
public void logoff() {
if (connection == null) return;
try { connection.close(); }
catch (SQLException sqlex) {
System.err.println("Unable to disconnect (SQL error)");
public void drawTable() {
Statement stmt;
ResultSet rset;
try {
String query = "SELECT * FROM SpecificTask";
stmt = connection.createStatement();
rset = stmt.executeQuery(query);
displayResultSet(rset);
stmt.close();
catch (SQLException sqlex) {
sqlex.printStackTrace();
private void displayResultSet(ResultSet rs) throws SQLException {
// position to first record
boolean moreRecords = rs.next();
// if there are no records, display a message
if (! moreRecords){
JOptionPane.showMessageDialog (this, "No Specific Tasks to begin.");
return;
Vector columnHeads = new Vector();
Vector rows = new Vector();
try {
// get column heads
ResultSetMetaData rsmd = rs.getMetaData();
for (int i = 1; i <= rsmd.getColumnCount(); ++i)
columnHeads.addElement (rsmd.getColumnName(i));
//get row data
// System.out.println("Got this far. Check getNextRow(...)");
do { rows.addElement(getNextRow(rs, rsmd)); }
while (rs.next());
// display table with ResultSet contents
jTable1 = new JTable (rows, columnHeads);
JScrollPane scroller = new JScrollPane(jTable1);
// validate();
catch (SQLException sqlex) {
sqlex.printStackTrace();
private Vector getNextRow (ResultSet rs, ResultSetMetaData rsmd) throws SQLException {
Vector currentRow = new Vector();
for (int i = 1; i <= rsmd.getColumnCount(); ++ i)
switch (rsmd.getColumnType(i)) {
case Types.VARCHAR:
currentRow.addElement(rs.getString(i));
break;
case Types.INTEGER:
currentRow.addElement(new Long (rs.getLong(i) ) );
break;
default: System.out.println ("Type was: " +
rsmd.getColumnTypeName(i));
return currentRow;
}

Answer 1

The table header is shown automatically when you add the table to a scrollpane and then display the scrollpane in a panel. You use the following code to build the table/scrollpane:
// display table with ResultSet contents
jTable1 = new JTable (rows, columnHeads);
JScrollPane scroller = new JScrollPane(jTable1);
but, you add the table to your panel NOT the scrollpane:
this.add(jTable1, new GridBagConstraints(0, 2, 2, 1, 1.0, 1.0
,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(12, 25, 0, 22), 522, 281));
You should be adding the scrollpane to you panel.