Form validation error

[Yohan Weerasinghe]

Hi all,

Please have a look at the following 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 tPhoneNumber, tPhoneNumberOffice, tMonth;

    JButton button1;

    CardLayout ourLayout;

    GridBagLayout gbl1,gbl2;
    GridBagConstraints gbc1,gbc2;

    int iPhone1,iPhone2,iMonth;

    boolean i = true;

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

        tPhoneNumber = new JTextField(10);
	tMonth = new JTextField(10);
	tPhoneNumberOffice = 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(hPersonal);

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



       /*Adding mCard2 Stuffs*/

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

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

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

                                 gbc2.gridx = 1;
                gbc2.gridy = 4;
                gbc2.gridwidth= 1;
                gbc2.gridheight = 1;
                gbl2.setConstraints(button1,gbc2);
                mCard2.add(button1);


         /*Adding panels to cards*/

                card1 = new JPanel();
                card1.add(mCard2);

                card2 = new JPanel();
                card2.add(mCard1);


        /*Setting up the main card*/


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


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

    }

    public void validateNumbersFields()
    {
            try
            {
                iPhone1 = Integer.parseInt(tPhoneNumber.getText());
                iPhone2 = Integer.parseInt(tPhoneNumberOffice.getText());
                iMonth = Integer.parseInt(tMonth.getText());

            }
            catch(NumberFormatException ne)
            {
                JOptionPane.showMessageDialog(null,"You have entered CHARACTERS to a DIGITS ONLY field");
                i=false;
            }
        }

    public void actionPerformed(ActionEvent ae)
    {
        validateNumbersFields();


        if(ae.getSource().equals(button1))
        {
            if(tPhoneNumber.getText() == null ? "" == null : tPhoneNumber.getText().equals(""))
                 {
                     JOptionPane.showMessageDialog(null,"Please fill the first name");

                 }
            else
            {
            if(i==false)
            {
                JOptionPane.showMessageDialog(null,"Error");
            }
            else
            {
            ourLayout.show(cards, "one");
            }
        }
    }
    }
}

In here when the user clicks on the button, if all the CONDITIONS are OK, then the display should move to the second card. But that is not happening. Please help me.