PLS help with stupid JPanel and JTable :-(

Question

Hi all im crying now :-(
Ive just recreated a panel for use with SWING. Now I want the table to be displayed but it just is not there.
Nothing i seem to do makes it appear and im really confused????? Just add this to a simple JFrame and you will see what I mean
it should look like this
TITLE
lbl1 txt1 lbl2 txt2
lbl3 txt3 lbl4 txt 4
button
Table
however the table is not there :-(
Author: Justin Thomas
Date  : 14 Jan 2002
Notes : A simple login display
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
public class Options extends JPanel implements ActionListener
    private IDNTester parent;
    private TextArea Results = new TextArea(18,80);
    private JButton Start = new JButton("Start Test");
    private JLabel error = new JLabel ("");
    private JTextField txtConns = new JTextField("1",4);
    private JTextField txtClients = new JTextField("10",4);
    private JTextField txtServer = new JTextField("Nutcracker",10);
    private JTextField txtPort = new JTextField("8101",5);
    public String Server;
    public int Port;
    public int Connections;
    public int Clients;
    private String newline;
    public Options(IDNTester ref)
        parent = ref;
        newline = System.getProperty("line.separator");
        JLabel lblMain = new JLabel ("WebIDN Performance Tester");
        JLabel  lblServer = new JLabel ("Server:");
        JLabel  lblPort = new JLabel ("Port:");
        JLabel  lblConns = new JLabel ("Connections:");
        JLabel  lblClients = new JLabel ("Clients:");
        GridBagLayout gridBag = new GridBagLayout();
        GridBagConstraints constraints = new GridBagConstraints();
        setLayout(gridBag);
        constraints.anchor = GridBagConstraints.CENTER;
        constraints.gridwidth = 4;
        constraints.gridx = 0;
        gridBag.setConstraints(lblMain, constraints);
        add(lblMain);
        constraints.insets = new Insets(10,0,0,0);  //top padding
        constraints.gridy = 1;
        gridBag.setConstraints(error, constraints);
        error.setForeground(Color.red);
        add(error);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = 1;
        constraints.gridx = 0;
        //********************************Server and COnnections***************
        constraints.fill = GridBagConstraints.BOTH;
        constraints.gridy = 2;
        gridBag.setConstraints(lblServer, constraints);
        add(lblServer);
        constraints.gridx = 1;
        gridBag.setConstraints(txtServer, constraints);
        add(txtServer);
        // Add some space between fields
        constraints.gridx = 2;
        gridBag.setConstraints(lblConns, constraints);
        add(lblConns);
        constraints.gridx = 3;
        gridBag.setConstraints(txtConns, constraints);
        add(txtConns);
        //********************************** Port and clients******************
        constraints.gridy = 3;
        constraints.insets = new Insets(5,0,0,0);
        constraints.gridx = 0;
        gridBag.setConstraints(lblPort, constraints);
        add(lblPort);
        constraints.gridx = 1;
        gridBag.setConstraints(txtPort, constraints);
        add(txtPort);
        constraints.gridx = 2;
        gridBag.setConstraints(lblClients, constraints);
        add(lblClients);
        constraints.gridx = 3;
        gridBag.setConstraints(txtClients, constraints);
        add(txtClients);
        //********************************** Buttons***************************
        constraints.anchor = GridBagConstraints.CENTER;
        constraints.gridy = 4;
        constraints.insets = new Insets(10,0,0,0);  //top padding
        constraints.gridwidth = 4;   //4 columns wide
        constraints.gridx = 0;
        gridBag.setConstraints(Start, constraints);
        add(Start);
        // Results area
        constraints.gridx = 0;
        constraints.gridy = 5;
        constraints.gridwidth = 5;   //Colum width
        //gridBag.setConstraints(Results, constraints);
        //add(Results);
        // JTable
        DefaultTableModel defaultTab = new DefaultTableModel();
        JTable jtable = new JTable(defaultTab);
        defaultTab.addColumn("ThreadID");
        defaultTab.addColumn("ClientID");
        defaultTab.addColumn("RIC");
        defaultTab.addColumn("TimeTaken");
        defaultTab.addColumn("RCount");
        defaultTab.addColumn("Bytes");
        //add scrollpane to our table
        gridBag.setConstraints(jtable, constraints);
        add(new JScrollPane(jtable));
        // Add listeners
        txtConns.addActionListener(this);
        txtClients.addActionListener(this);
        txtServer.addActionListener(this);
        txtPort.addActionListener(this);
        Start.addActionListener(this);
    public void actionPerformed(ActionEvent event)
        // Validate fields and if correct then start
        boolean valid = true;
        Server = txtServer.getText();
        try {
            Port= Integer.parseInt(txtPort.getText());
            Connections = Integer.parseInt(txtConns.getText());
            Clients = Integer.parseInt(txtClients.getText());
        catch(NumberFormatException nfe) {
            valid = false;
        if (valid && Server.length() > 0)
            error.setText("");
            parent.connect();
        else
            error.setText("Port/Client/Connections must be numerical");
            validate();
    // Add a new line to the test
    public void addLine(String text)
        Results.append(text + newline);
}

Answer 1

Hi,
It looks like you haven't closed the comments. Is anything added after error.
Anyway try setting the fill constrains on your table to BOTH. The table you have created in empty so it may have trouble determining it's size.
regards,
Terry