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.