Display error in CardLayout

[Yohan Weerasinghe]

I having a problem in getting the Card Layout into the display. When I open the applet, I get nothing but a blank area. No errors. I want to click on the Next button, and that should open the card2 layout. Please help me. Here is my code.

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

public class STestFile1 extends JApplet implements ActionListener{

    JPanel card1,card2, cards;

   JLabel hApply, hPersonal,hHeading;

   JTextField tFirstName, tMiddleName, tLastName;

    JButton button1;

    CardLayout ourLayout;

    GridBagLayout gbl1,gbl2;
    GridBagConstraints gbc1,gbc2;

    public void init()
    {
        hApply = new JLabel("Applying For");
	hPersonal = new JLabel("Personal Details");
        hHeading = new JLabel("Application Form");

        tFirstName = new JTextField(10);
	tLastName = new JTextField(10);
	tMiddleName = new JTextField(10);

        button1 = new JButton("NEXT");
        button1.addActionListener(this);

       gbl1 = new GridBagLayout();
        gbc1 = new GridBagConstraints();
       gbl2 = new GridBagLayout();
        gbc2 = new GridBagConstraints();


        JPanel mCard1 = new JPanel();
	mCard1.setLayout(gbl1);

        JPanel mCard2 = new JPanel();
	mCard2.setLayout(gbl2);



	gbc1.anchor = GridBagConstraints.WEST;
        gbc2.anchor = GridBagConstraints.WEST;


        /*Adding mCard1 stuffs*/

                gbc1.gridx = 1;
                gbc1.gridy = 1;
                gbc1.gridwidth= 1;
                gbc1.gridheight = 1;
                gbl1.setConstraints(hApply,gbc1);
                mCard1.add(hApply);

                gbc1.gridx = 1;
                gbc1.gridy = 2;
                gbc1.gridwidth= 1;
                gbc1.gridheight = 1;
                gbl1.setConstraints(hPersonal,gbc1);
                mCard1.add(hApply);

                gbc1.gridx = 1;
                gbc1.gridy = 3;
                gbc1.gridwidth= 1;
                gbc1.gridheight = 1;
                gbl1.setConstraints(hHeading,gbc1);
                mCard1.add(hHeading);

                 gbc1.gridx = 1;
                gbc1.gridy = 4;
                gbc1.gridwidth= 1;
                gbc1.gridheight = 1;
                gbl1.setConstraints(button1,gbc1);
                mCard1.add(button1);


       /*Adding mCard2 Stuffs*/

                gbc2.gridx = 1;
                gbc2.gridy = 1;
                gbc2.gridwidth= 1;
                gbc2.gridheight = 1;
                gbl2.setConstraints(tFirstName,gbc2);
                mCard2.add(tFirstName);

                gbc2.gridx = 1;
                gbc2.gridy = 2;
                gbc2.gridwidth= 1;
                gbc2.gridheight = 1;
                gbl2.setConstraints(tMiddleName,gbc2);
                mCard2.add(tMiddleName);

                gbc2.gridx = 1;
                gbc2.gridy = 3;
                gbc2.gridwidth= 1;
                gbc2.gridheight = 1;
                gbl2.setConstraints(tLastName,gbc2);
                mCard2.add(tLastName);

         /*Adding panels to cards*/

                card1 = new JPanel();
                card1.add(mCard1);

                card2 = new JPanel();
                card2.add(mCard2);


        /*Setting up the main card*/


        cards = new JPanel();
        cards.setLayout(ourLayout);
        cards.add(card1,"one");
        cards.add(card2,"two");


        /*Setting up the main window*/
        JPanel panel1 = (JPanel)getContentPane();
        panel1.setLayout(new BorderLayout());
        panel1.add(cards);
    }

    public void actionPerformed(ActionEvent ae)
    {
        if(ae.getSource().equals(button1))
        {
            ourLayout.show(cards, "two");
        }
    }
}

Please help me

[Ulf Dittmer]

There's no code that initializes "ourLayout" to anything, so you're using a null layout.

[Yohan Weerasinghe]

Thank you! I am so Happy...Thanks again!!! Thanks!!!