Cannot understand whats wrong

[Lehane_9]

I dont know why my new panel called welcome will noy open can anybody please help.

First JFrame is this
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class Example_22_2 extends JFrame implements ActionListener
{
private JButton loginBtn, viewTimeTablesBtn,BuyTicketsBtn;
JPanel cardHolder;
CardLayout card;
Container c;
Example_22_2 panelmgr;





public Example_22_2(Example_22_2 panelmgr)
{
super("Irish Rail Timetabling and Ticketing System ");
cardHolder=new JPanel();
card=new CardLayout();
cardHolder.setLayout(card);

c=getContentPane();

welcome panel1 = new welcome(this);
// adminLogIn panel2 = new adminLogIn(this);

cardHolder.add(panel1, "panel1",1);
//cardHolder.add(panel2,"panel2",1);


loginBtn =new JButton("Login change timetables");
viewTimeTablesBtn = new JButton("View Timetables");
BuyTicketsBtn = new JButton ("Buy tickets");


loginBtn.addActionListener(this);
viewTimeTablesBtn.addActionListener(this);
BuyTicketsBtn.addActionListener(this);


c.add(loginBtn);
c.add(viewTimeTablesBtn);
c.add(BuyTicketsBtn);


setSize (250, 200);
show();
}

public static void main (String args[])
{
Example_22_2 example = new Example_22_2();
}

public void changePanel(String in)
{
card.show(cardHolder,in);
}

public void actionPerformed(ActionEvent e)
{


if(e.getSource()==viewTimeTablesBtn)
{
panelmgr.changePanel("panel1");


}


}
}



Then welcome.java is

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class welcome extends JPanel implements ActionListener


{

private JCheckBox cd1Cbx;
private JButton resetBtn;

private Container c;


public welcome()
{

c.add(cd1Cbx);
c.add(resetBtn);

}
public void actionPerformed(ActionEvent e)
{




}


}

I dont know why it wont work. any help greatly appreciated

[hardwired]

Code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class E22_2 extends JFrame implements ActionListener
{
    private JButton loginBtn, viewTimeTablesBtn, BuyTicketsBtn;
    JPanel cardHolder;
    CardLayout card; 
    Container c;

    public E22_2()
    {
        super("Irish Rail Timetabling and Ticketing System ");
        cardHolder=new JPanel();
        card=new CardLayout();
        cardHolder.setLayout(card);

        c=getContentPane();

        Welcome panel1 = new Welcome(this);
//        adminLogIn panel2 = new adminLogIn(this);

        cardHolder.add("welcome", panel1);
//        cardHolder.add("admin", panel2);

        loginBtn =new JButton("Login change timetables");
        viewTimeTablesBtn = new JButton("View Timetables");
        BuyTicketsBtn = new JButton ("Buy tickets");

        loginBtn.addActionListener(this);
        viewTimeTablesBtn.addActionListener(this);
        BuyTicketsBtn.addActionListener(this);

        System.out.println("JFrame default layout manager = " +
                            getLayout().getClass().getName());
        // no constraint -> default center section
        c.add(cardHolder);
        JPanel buttonPanel = new JPanel();
        buttonPanel.add(loginBtn);
        buttonPanel.add(viewTimeTablesBtn);
        buttonPanel.add(BuyTicketsBtn);
        c.add(buttonPanel, "South");

        setSize (450, 200);
        setVisible(true);
    }

    public static void main (String args[])
    {
        new E22_2();
    }

    public void changePanel(String in)
    {
        card.show(cardHolder, in);
    }

    public void actionPerformed(ActionEvent e)
    {
        if(e.getSource()==viewTimeTablesBtn)
        {
            changePanel("welcome"); 
        }
    }
}

class Welcome extends JPanel implements ActionListener
{
    private JCheckBox cd1Cbx = new JCheckBox("checkBox");
    private JButton resetBtn = new JButton("reset");
//    private Container c;

    public Welcome(E22_2 e)
    {
        add(cd1Cbx);
        add(resetBtn);
    }

    public void actionPerformed(ActionEvent e)
    {
    }
}