Visual Class: Set a label in main window from dialog box

Question

Hi,
Firstly my project is a visual project and at the time being has only 2 classes, both visual. One a main window and then one a dialog.
The project is about a gym membership, and what i want it to do at the moment is to set the name text box i have in the main window by typying it in another text box in my dialog. Understand?
This is my text field method in MainWindow...
public JTextField getNameTextField() {
          if (NameTextField == null) {
               NameTextField = new JTextField();
               NameTextField.setBounds(new Rectangle(164, 28, 193, 26));
          return NameTextField;
     }And my New Member text field in the dialog, called NameDialog
private JTextField getNewMemberTextField() {
          if (NewMemberTextField == null) {
               NewMemberTextField = new JTextField();
               NewMemberTextField.setBounds(new Rectangle(36, 56, 209, 28));
          return NewMemberTextField;
     }In the dialog i have created a button called,"OK" and if i press it without entering a String then an error box appears which all works correctly. Then as you can see if i enter a String here i want this String to be entered and showed in my MainWindow class in the name text box.
But this is not working and i am having trouble here after the else...
else {
GymMembershipMainWindow mainWindow = new GymMembershipMainWindow();                                 mainWindow.getNameTextField().setText(getNewMemberTextField().getText());                              
NameDialog.this.setVisible(false);Sorry but do you understand what i am trying to do? Apologies if any of it is unclear.
Would appreciate any help. Thank you.

Answer 1

Ok well there is quite a bit, but only 2 classes. This is the first class which is the main class.
     package membership;
import javax.swing.SwingUtilities;
import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import java.awt.Dimension;
import javax.swing.JMenu;
import java.awt.Rectangle;
import javax.swing.JMenuItem;
import javax.swing.JMenuBar;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
public class GymMembershipMainWindow extends JFrame {
     private static final long serialVersionUID = 1L;
     private JPanel jContentPane = null;
     private JMenuBar applicationMenuBar = null;
     private JMenu memberMenu = null;
     private JMenuItem changeNameMenuItem = null;
     private JMenuItem changeAddressMenuItem = null;
     private JLabel NameLabel = null;
     private JLabel AddressLabel = null;
     private JTextField NameTextField = null;
     private JTextField AddressTextField = null;
     private JLabel MembershipTypeLabel = null;
     private JRadioButton MonthlyRadioButton = null;
     private JRadioButton AnnualRadioButton = null;
     private JLabel PersonalTrainerLabel = null;
     private ButtonGroup group = new ButtonGroup();
      * This method initializes applicationMenuBar     
      * @return javax.swing.JMenuBar     
     private JMenuBar getApplicationMenuBar() {
          if (applicationMenuBar == null) {
               applicationMenuBar = new JMenuBar();
               applicationMenuBar.add(getMemberMenu());
          return applicationMenuBar;
      * This method initializes memberMenu     
      * @return javax.swing.JMenu     
     private JMenu getMemberMenu() {
          if (memberMenu == null) {
               memberMenu = new JMenu();
               memberMenu.setText("Member");
               memberMenu.add(getChangeNameMenuItem());
               memberMenu.add(getChangeAddressMenuItem());
          return memberMenu;
      * This method initializes changeNameMenuItem     
      * @return javax.swing.JMenuItem     
     private JMenuItem getChangeNameMenuItem() {
          if (changeNameMenuItem == null) {
               changeNameMenuItem = new JMenuItem();
               changeNameMenuItem.setText("Change Name");
               changeNameMenuItem.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
                    NameDialog dialog = new NameDialog();
                    dialog.setLocationRelativeTo(GymMembershipMainWindow.this);
                    dialog.setModal(true);
                    dialog.setVisible(true);
          return changeNameMenuItem;
      * This method initializes changeAddressMenuItem     
      * @return javax.swing.JMenuItem     
     private JMenuItem getChangeAddressMenuItem() {
          if (changeAddressMenuItem == null) {
               changeAddressMenuItem = new JMenuItem();
               changeAddressMenuItem.setText("Change Address");
          return changeAddressMenuItem;
      * This method initializes NameTextField     
      * @return javax.swing.JTextField     
     public JTextField getNameTextField() {
          if (NameTextField == null) {
               NameTextField = new JTextField();
               NameTextField.setBounds(new Rectangle(164, 28, 193, 26));
          return NameTextField;
      * This method initializes AddressTextField     
      * @return javax.swing.JTextField     
     private JTextField getAddressTextField() {
          if (AddressTextField == null) {
               AddressTextField = new JTextField();
               AddressTextField.setBounds(new Rectangle(165, 74, 192, 26));
          return AddressTextField;
      * This method initializes MonthlyRadioButton     
      * @return javax.swing.JRadioButton     
     private JRadioButton getMonthlyRadioButton() {
          if (MonthlyRadioButton == null) {
               MonthlyRadioButton = new JRadioButton();
               MonthlyRadioButton.setBounds(new Rectangle(171, 119, 73, 21));
               MonthlyRadioButton.setText("Monthly");
               group.add(MonthlyRadioButton);
               MonthlyRadioButton.setSelected(true);
          return MonthlyRadioButton;
      * This method initializes AnnualRadioButton     
      * @return javax.swing.JRadioButton     
     private JRadioButton getAnnualRadioButton() {
          if (AnnualRadioButton == null) {
               AnnualRadioButton = new JRadioButton();
               AnnualRadioButton.setBounds(new Rectangle(269, 121, 70, 21));
               AnnualRadioButton.setText("Annual");
               group.add(AnnualRadioButton);
          return AnnualRadioButton;
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          SwingUtilities.invokeLater(new Runnable() {
               public void run() {                    
                    GymMembershipMainWindow thisClass = new GymMembershipMainWindow();
                    thisClass.setLocationRelativeTo(null);
                    thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    thisClass.setVisible(true);
      * This is the default constructor
     public GymMembershipMainWindow() {
          super();
          initialize();
      * This method initializes this
      * @return void
     private void initialize() {
          this.setSize(500, 300);
          this.setJMenuBar(getApplicationMenuBar());
          this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          this.setContentPane(getJContentPane());
          this.setTitle("Gym Membership");
      * This method initializes jContentPane
      * @return javax.swing.JPanel
     private JPanel getJContentPane() {
          if (jContentPane == null) {
               PersonalTrainerLabel = new JLabel();
               PersonalTrainerLabel.setBounds(new Rectangle(30, 158, 110, 21));
               PersonalTrainerLabel.setText("Personal Trainer");
               MembershipTypeLabel = new JLabel();
               MembershipTypeLabel.setBounds(new Rectangle(32, 115, 114, 24));
               MembershipTypeLabel.setText("MembershipType");
               AddressLabel = new JLabel();
               AddressLabel.setBounds(new Rectangle(71, 75, 64, 24));
               AddressLabel.setText("Address");
               NameLabel = new JLabel();
               NameLabel.setBounds(new Rectangle(69, 26, 57, 25));
               NameLabel.setText("Name");
               jContentPane = new JPanel();
               jContentPane.setLayout(null);
               jContentPane.add(NameLabel, null);
               jContentPane.add(AddressLabel, null);
               jContentPane.add(getNameTextField(), null);
               jContentPane.add(getAddressTextField(), null);
               jContentPane.add(MembershipTypeLabel, null);
               jContentPane.add(getMonthlyRadioButton(), null);
               jContentPane.add(getAnnualRadioButton(), null);
               jContentPane.add(PersonalTrainerLabel, null);
          return jContentPane;
}  //  @jve:decl-index=0:visual-constraint="10,10"and this is my other class. The dialog
package membership;
import javax.swing.JPanel;
import java.awt.Frame;
import java.awt.BorderLayout;
import javax.swing.JDialog;
import javax.swing.JLabel;
import java.awt.Rectangle;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.Color;
public class NameDialog extends JDialog {
     private static final long serialVersionUID = 1L;
     private JPanel jContentPane = null;
     private JLabel EnterMemberNameLabel = null;
     private JTextField NewMemberTextField = null;
     private JButton OKButton = null;
     private JButton CancelButton = null;
     private JLabel ErrorLabel = null;
     private String MembersName;
      * @param owner
     public NameDialog() {
          super();
          initialize();
      * This method initializes this
      * @return void
     private void initialize() {
          this.setSize(300, 200);
          this.setTitle("Enter member name");
          this.setContentPane(getJContentPane());
      * This method initializes jContentPane
      * @return javax.swing.JPanel
     private JPanel getJContentPane() {
          if (jContentPane == null) {
               ErrorLabel = new JLabel();
               ErrorLabel.setBounds(new Rectangle(60, 93, 151, 17));
               ErrorLabel.setForeground(Color.red);
               ErrorLabel.setText("YOU MUST ENTER A NAME");
               ErrorLabel.setVisible(false);
               EnterMemberNameLabel = new JLabel();
               EnterMemberNameLabel.setBounds(new Rectangle(12, 5, 257, 31));
               EnterMemberNameLabel.setText("Please enter the new members name below:");
               jContentPane = new JPanel();
               jContentPane.setLayout(null);
               jContentPane.setName("");
               jContentPane.add(EnterMemberNameLabel, null);
               jContentPane.add(getNewMemberTextField(), null);
               jContentPane.add(getOKButton(), null);
               jContentPane.add(getCancelButton(), null);
               jContentPane.add(ErrorLabel, null);
          return jContentPane;
      * This method initializes NewMemberTextField     
      * @return javax.swing.JTextField     
     private JTextField getNewMemberTextField() {
          if (NewMemberTextField == null) {
               NewMemberTextField = new JTextField();
               NewMemberTextField.setBounds(new Rectangle(36, 56, 209, 28));
          return NewMemberTextField;
      * This method initializes OKButton     
      * @return javax.swing.JButton     
     private JButton getOKButton() {
          if (OKButton == null) {
               OKButton = new JButton();
               OKButton.setBounds(new Rectangle(33, 118, 72, 26));
               OKButton.setText("OK");
               OKButton.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
                         if(getNewMemberTextField().getText().equals(""))
                              ErrorLabel.setVisible(true);
                         else {
                              GymMembershipMainWindow mainWindow = new GymMembershipMainWindow();
                              mainWindow.getNameTextField().setText(getNewMemberTextField().getText());                              
                              NameDialog.this.setVisible(false);
          return OKButton;
      * This method initializes CancelButton     
      * @return javax.swing.JButton     
     private JButton getCancelButton() {
          if (CancelButton == null) {
               CancelButton = new JButton();
               CancelButton.setBounds(new Rectangle(181, 119, 79, 27));
               CancelButton.setText("Cancel");
               CancelButton.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
                         NameDialog.this.setVisible(false);
          return CancelButton;
The problem i am having is in the OK method in the dialog class. At the 'else' i want the text that is inputted into the text field in the name dialog here, to appear into the text field in the main window for the name.
Understand me? Sorry. Thanks