Problem trying to log on to my video library system

Question

hello.
i am trying to log on to the video library system that i just developed. the LogOn program works to a certain extent (the appropriate programs are shown below). when i try to log onto my system time. a JOptionPane.ERROR_MESSAGE message appears on screen. when i press OK inside the message, the message disappears but the same one appears again. i press OK again + the JOptionPane messages stop appearing again. when i press ok after entering my login details in the text + password fields, a main menu (either an administrator menu or a user menu) should be displayed on screen. what should i do to make this problem go away?
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
public class HomeEntertainment extends JPanel implements ActionListener{
   private JTabbedPane jtp = new JTabbedPane();
   private JPanel cP1 = new JPanel();
   private JPanel cP2 = new JPanel();
   private JPanel cP3 = new JPanel();
   private JPanel bP1 = new JPanel();
   private JPanel bP2 = new JPanel();
   private JPanel bP3 = new JPanel();
   private JButton jbAdministratorLogOn = new JButton("Log On");
   private JButton jbNewUserRegister = new JButton("Register");
   private JButton jbExistingUserLogOn = new JButton("Log On");
   private JButton jbAdministratorExitTheSystem = new JButton("Exit the system");
   private JButton jbNewUserExitTheSystem = new JButton("Exit the system");
   private JButton jbExistingUserExitTheSystem = new JButton("Exit the system");
   public HomeEntertainment(){
      cP1.setLayout(new BorderLayout());
      cP2.setLayout(new BorderLayout());
      cP3.setLayout(new BorderLayout());
      bP1.setBorder(new TitledBorder("Make a choice"));
      bP2.setBorder(new TitledBorder("Make a choice"));
      bP3.setBorder(new TitledBorder("Make a choice"));
      bP1.add(jbAdministratorLogOn);
      bP2.add(jbNewUserRegister);
      bP3.add(jbExistingUserLogOn);
      bP1.add(jbAdministratorExitTheSystem);
      bP2.add(jbNewUserExitTheSystem);
      bP3.add(jbExistingUserExitTheSystem);
      cP1.add(bP1, BorderLayout.SOUTH);
      cP2.add(bP2, BorderLayout.SOUTH);
      cP3.add(bP3, BorderLayout.SOUTH);
      jtp.addTab("Administrator", cP1);
      jtp.addTab("New User", cP2);
      jtp.addTab("Existing User", cP3);
      JFrame jf = new JFrame("Home Entertainment");          
      jf.getContentPane().add(jtp, BorderLayout.CENTER);
      jf.setSize(500, 500);
      jf.setVisible(true);
      jbAdministratorLogOn.addActionListener(this);
      jbNewUserRegister.addActionListener(this);
      jbExistingUserLogOn.addActionListener(this);
      jbAdministratorExitTheSystem.addActionListener(this);
      jbNewUserExitTheSystem.addActionListener(this);
      jbExistingUserExitTheSystem.addActionListener(this);
   public void actionPerformed(ActionEvent e){
      if(e.getSource() == jbAdministratorLogOn){
         LogOn logOn = new LogOn();
         logOn.setVisible(true);
      if(e.getSource() == jbNewUserRegister){
         RegistrationForm r = new RegistrationForm();
         r.setVisible(true);
      if(e.getSource() == jbExistingUserLogOn){
         LogOn logOn = new LogOn();
         logOn.setVisible(true);
      if(e.getSource() == jbAdministratorExitTheSystem){
         System.exit(0);
      if(e.getSource() == jbNewUserExitTheSystem){
         System.exit(0);
      if(e.getSource() == jbExistingUserExitTheSystem){
         System.exit(0);
   public static void main(String[] args){
      new HomeEntertainment();
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class LogOn extends JFrame{
   JPanel pnlBody, pnlFooter;
   JLabel unLabel = new JLabel("Username: ");
   JLabel pwLabel = new JLabel("Password: ");
   JTextField jtfUN = new JTextField(20);
   JPasswordField jtfPW = new JPasswordField(20);
   JButton jbOK = new JButton("OK");
   JButton jbCancel = new JButton("Cancel");
   Container contentpane;
   public LogOn(){
      super("Welcome to Home Entertainment");
      contentpane = getContentPane();
      contentpane.setLayout(new BorderLayout());
      pnlBody = new JPanel();
      pnlFooter = new JPanel();
      pnlBody.add(unLabel);
      pnlBody.add(jtfUN);
      pnlBody.add(pwLabel);
      pnlBody.add(jtfPW);
      pnlFooter.add(jbOK);
      pnlFooter.add(jbCancel);
      contentpane.add(pnlBody,BorderLayout.NORTH);
      contentpane.add(pnlFooter,BorderLayout.CENTER);
      pack();
      setVisible(true);
      jbOK.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent e){
            String username;
            String password;
            String[] userUsernameArray = {"Ann Smyth", "John Murphy"};
            String[] userPasswordArray = {"1", "2"};
            String[] adminUsernameArray = {"Administrator"};
            String[] adminPasswordArray = {"0"};
            username = jtfUN.getText().trim();
            password = new String(jtfPW.getPassword());
            if(username.equals(userUsernameArray) && password.equals(userPasswordArray)){
               setVisible(false);     
               UserMainMenu umm = new UserMainMenu();
               umm.setVisible(true);
            else{
                 JOptionPane.showMessageDialog(null, "Error\n\nYou have entered an incorrect username and/or password\nPlease try again", null, JOptionPane.ERROR_MESSAGE);
            if(username.equals(adminUsernameArray) && password.equals(adminPasswordArray)){
               setVisible(false);     
               AdminMainMenu amm = new AdminMainMenu();
               amm.setVisible(true);
            else{
                 JOptionPane.showMessageDialog(null, "Error\n\nYou have entered an incorrect username and/or password\nPlease try again", null, JOptionPane.ERROR_MESSAGE);
      jbCancel.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent e){
            setVisible(false);
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class AdminMainMenu extends JFrame{
   JPanel pnlBody;
   JButton btnOrderSystem = new JButton("Order System");
   JButton btnMaintenance = new JButton("Maintenance");
   JButton btnAdminLogOff = new JButton("Log Off");
   Container contentpane;
   public AdminMainMenu(){
      super("Main Menu");
      contentpane = getContentPane();
      contentpane.setLayout(new BorderLayout());
      pnlBody = new JPanel();
      pnlBody.add(btnOrderSystem);
      pnlBody.add(btnMaintenance);
      pnlBody.add(btnAdminLogOff);
      contentpane.add(pnlBody,BorderLayout.CENTER);
      pack();
      setVisible(true);
      btnOrderSystem.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent e){
            setVisible(false);  
            //OrderSystem os = new OrderSystem();
            //os.setVisible(true);    
      btnMaintenance.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent e){
            setVisible(false);  
            //Maintenance m = new Maintenance();
            //m.setVisible(true);    
      btnAdminLogOff.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent e){
            int result;
            result = JOptionPane.showConfirmDialog(null, "Are you sure you want to log off?", null, JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE);
            if(result == JOptionPane.YES_OPTION){
               setVisible(false);
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class UserMainMenu extends JFrame{
   JPanel pnlBody;
   JButton btnUserProductMenu = new JButton("Product Menu");
   JButton btnUserMemberMenu = new JButton("Member Menu");
   JButton btnUserRentalMenu = new JButton("Rental Menu");
   JButton btnUserLogOff = new JButton("Log Off");
   Container contentpane;
   public UserMainMenu(){
      super("Main Menu");
      contentpane = getContentPane();
      contentpane.setLayout(new BorderLayout());
      pnlBody = new JPanel();
      pnlBody.add(btnUserProductMenu);
      pnlBody.add(btnUserMemberMenu);
      pnlBody.add(btnUserRentalMenu);
      pnlBody.add(btnUserLogOff);
      contentpane.add(pnlBody,BorderLayout.CENTER);
      pack();
      setVisible(true);
      btnUserProductMenu.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent e){
            setVisible(false); 
            //UserProductMenu upm = new UserProductMenu();
            //upm.setVisible(true);    
      btnUserMemberMenu.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent e){
            setVisible(false); 
            //UserMemberMenu umm = new UserMemberMenu();
            //umm.setVisible(true);  
      btnUserRentalMenu.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent e){
            setVisible(false); 
            //UserRentalMenu urm = new UserRentalMenu();
            //urm.setVisible(true);  
      btnUserLogOff.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent e){
            int result;
            result = JOptionPane.showConfirmDialog(null, "Are you sure you want to log off?", null, JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE);
            if(result == JOptionPane.YES_OPTION){
               setVisible(false);
}

Answer 1

See my answer in your other posting on this topic.
Please don't start new threads on the same problem; if you have new information (or a better code sample), just continue in the original thread.