Using a swing program with a gui-based jdbc program

Question

hello.
my name is james mcfadden and i am a final year computing student at letterkenny IT in ireland. i have 2 programs here that i want to make interact with each other. the first one is a jdbc demo and the second one is a login program that i'll be using with the first one. i was trying to get the 2 programs interacting with each other yesterday but i was unsuccessful. would you be able to look at it as soon as possible? i have to be able to use these programs next week. thank you very much.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.JOptionPane;
import java.sql.*;
public class Demo extends JFrame {
static String url = "jdbc:odbc:VideoLibrary";
static Statement stmt;
static Connection con;
     //declare member variables here
     JTextField hostField;
JTextField queryField;
QueryTableModel qtm;
JComboBox comboBox;
public static void main(String args[]){
     //new LogOn();     
int choice=-1;
          do{
choice=getChoice();
if(choice!=0){
getSelected(choice);
}while(choice!=5);
System.exit(0);
public static int getChoice(){
String choice;
int ch;
choice = JOptionPane.showInputDialog(null,"1. Maintain product details\n"+"2. Maintain member details\n"+"3. Maintain rental details\n"+"4. View product, member and rental details\n"+"5. Log Off\n\n"+"Enter your choice");
          ch = Integer.parseInt(choice);
return ch;
public static void getSelected(int choice){   
          if(choice==1){
addProducts();
if(choice==2){
addMembers();
          if(choice==3){
addRentals();
          if(choice==4){
          Demo test = new Demo();
test.setVisible(true);
public static Connection getConnection(){
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          catch(java.lang.ClassNotFoundException e) {
System.err.print("ClassNotFoundException: ");
System.err.println(e.getMessage());
try {
con=DriverManager.getConnection(url,"","");
          catch(SQLException ex) {
System.err.println("SQLException: " + ex.getMessage());
return con;
public static void addProducts(){
Connection con = getConnection();
String addProduct1, addProduct2, addProduct3, addProduct4, addProduct5, addProduct6, addProduct7, addProduct8, addProduct9, addProduct10, addProduct11, addProduct12, addProduct13, addProduct14, addProduct15, addProduct16, addProduct17, addProduct18, addProduct19, addProduct20, addProduct21, addProduct22, addProduct23, addProduct24, addProduct25, addProduct26, addProduct27, addProduct28, addProduct29, addProduct30, addProduct31, addProduct32, addProduct33, addProduct34, addProduct35, addProduct36, addProduct37, addProduct38, addProduct39, addProduct40, addProduct41, addProduct42, addProduct43, addProduct44, addProduct45, addProduct46, addProduct47, addProduct48, addProduct49, addProduct50, addProduct51, addProduct52, addProduct53, addProduct54, addProduct55, addProduct56, addProduct57, addProduct58, addProduct59, addProduct60, addProduct61, addProduct62, addProduct63, addProduct64, addProduct65, addProduct66, addProduct67, addProduct68, addProduct69, addProduct70, addProduct71, addProduct72, addProduct73, addProduct74, addProduct75, addProduct76, addProduct77, addProduct78, addProduct79, addProduct80, addProduct81, addProduct82, addProduct83, addProduct84, addProduct85, addProduct86, addProduct87, addProduct88, addProduct89, addProduct90, addProduct91, addProduct92, addProduct93;
addProduct1 = "insert into Product values (110001, 'The Killers - Sams Town', 5.00, 'G', 'CD', 2006)";
addProduct2 = "insert into Product values (110002, 'Robbie Williams - Rudebox', 5.00, 'G', 'CD', 2006)";
addProduct3 = "insert into Product values (110003, 'Razorlight - Razorlight', 5.00, 'G', 'CD', 2006)";
addProduct4 = "insert into Product values (110004, 'My Chemical Romance - The Black Parade', 5.00, 'G', 'CD', 2006)";
addProduct5 = "insert into Product values (110005, 'Snow Patrol - Eyes Open', 5.00, 'G', 'CD', 2006)";
addProduct6 = "insert into Product values (110006, 'Scissor Sisters - Ta-Dah!', 5.00, 'G', 'CD', 2006)";
          addProduct7 = "insert into Product values (110007, 'Lovesounds - Justin Timberlake', 5.00, 'G', 'CD', 2006)";
addProduct8 = "insert into Product values (110008, 'Director - We thrive on big cities', 5.00, 'G', 'CD', 2006)";
addProduct9 = "insert into Product values (110009, 'Roxette - Roxette hits', 5.00, 'G', 'CD', 2006)";
addProduct10 = "insert into Product values (110010, 'Pussy Cat Dolls - PCD', 5.00, 'G', 'CD', 2006)";
addProduct11 = "insert into Product values (110011, 'Evanescence - The Open Door', 5.00, 'G', 'CD', 2006)";
addProduct12 = "insert into Product values (110012, 'Deacon Blue - The Singles', 5.00, 'G', 'CD', 2006)";
          addProduct13 = "insert into Product values (110013, 'Rod Stewart - The Best of Rod Stewart', 5.00, 'G', 'CD', 2006)";
          addProduct14 = "insert into Product values (110014, 'P Diddy - Press Play', 5.00, 'G', 'CD', 2006)";
addProduct15 = "insert into Product values (110015, 'James Morrison - Undiscovered', 5.00, 'G', 'CD', 2006)";
addProduct16 = "insert into Product values (110016, 'BDay - Beyonce', 5.00, 'G', 'CD', 2006)";
addProduct17 = "insert into Product values (110017, 'John Legend - Once Again', 5.00, 'G', 'CD', 2006)";
          addProduct18 = "insert into Product values (110018, 'Luther Vandross - The Ultimate', 5.00, 'G', 'CD', 2006)";
          addProduct19 = "insert into Product values (110019, 'Fleetwood Mac - Greatest Hits', 5.00, 'G', 'CD', 2006)";
          addProduct20 = "insert into Product values (110020, 'Kooks - Inside In Inside Out', 5.00, 'G', 'CD', 2006)";
          addProduct21 = "insert into Product values (110021, 'Scooter - Mind the Gap', 5.00, 'G', 'CD', 2007)";
          addProduct22 = "insert into Product values (110022, 'Scooter - Whos Got the Last', 5.00, 'G', 'CD', 2007)";
          addProduct23 = "insert into Product values (110023, 'Scooter - Jigga Jigga', 5.00, 'G', 'CD', 2007)";
          addProduct24 = "insert into Product values (110024, 'Dr. Alban - Look Whos Talking', 5.00, 'G', 'CD', 2007)";
          addProduct25 = "insert into Product values (110025, 'Dr. Alban - Hello Afrika', 5.00, 'G', 'CD', 2007)";
          addProduct26 = "insert into Product values (110026, 'Dr. Alban - Born in Africa', 5.00, 'G', 'CD', 2007)";
          addProduct27 = "insert into Product values (110027, 'Bon Jovi - Crossroad', 5.00, 'G', 'CD', 2007)";
          addProduct28 = "insert into Product values (110028, 'Bon Jovi - Have a Nice Day', 5.00, 'G', 'CD', 2007)";
          addProduct29 = "insert into Product values (110029, 'Bon Jovi - These Days', 5.00, 'G', 'CD', 2007)";
          addProduct30 = "insert into Product values (120001, 'Mission Impossible 3', 5.00, '15', 'DVD', 2006)";
          addProduct31 = "insert into Product values (120002, 'The Wind that Shakes the Barley', 5.00, '12', 'DVD', 2006)";
          addProduct32 = "insert into Product values (120003, 'The Break Up', 5.00, '12', 'DVD', 2006)";
          addProduct33 = "insert into Product values (120004, 'The Da Vinci Code', 5.00, '15', 'DVD', 2006)";
          addProduct34 = "insert into Product values (120005, 'Ice Age 2', 5.00, 'G', 'DVD', 2006)";
          addProduct35 = "insert into Product values (120006, 'Just My Luck', 5.00, '12', 'DVD', 2006)";
          addProduct36 = "insert into Product values (120007, 'Stormbreaker', 5.00, '12', 'DVD', 2006)";
          addProduct37 = "insert into Product values (120008, 'X-Men 3', 5.00, 'PG', 'DVD', 2006)";
          addProduct38 = "insert into Product values (120009, 'Lake House', 5.00, '12', 'DVD', 2006)";
          addProduct39 = "insert into Product values (120010, 'Inside Man', 5.00, '15', 'DVD', 2006)";
          addProduct40 = "insert into Product values (120011, 'Ultraviolet', 5.00, '12', 'DVD', 2006)";
          addProduct41 = "insert into Product values (120012, 'Friends with Money', 5.00, '15', 'DVD', 2006)";
          addProduct42 = "insert into Product values (120013, 'Fearless', 5.00, 'PG', 'DVD', 2006)";
          addProduct43 = "insert into Product values (120014, 'When A Stranger Calls', 5.00, '15', 'DVD', 2006)";
          addProduct44 = "insert into Product values (120015, 'Prime', 5.00, '15', 'DVD', 2006)";
          addProduct45 = "insert into Product values (120016, 'Poseidon', 5.00, '12', 'DVD', 2006)";
          addProduct46 = "insert into Product values (120017, 'Tristan & Isolde', 5.00, '12', 'DVD', 2006)";
          addProduct47 = "insert into Product values (120018, 'Little Mermaid', 5.00, '12', 'DVD', 2006)";
          addProduct48 = "insert into Product values (120019, 'The Fast & The Furious 3', 5.00, '12', 'DVD', 2006)";
          addProduct49 = "insert into Product values (120020, 'The Omen', 5.00, '15', 'DVD', 2006)";
          addProduct50 = "insert into Product values (120021, 'Eragon', 5.00, '15', 'DVD', 2007)";
          addProduct51 = "insert into Product values (120022, 'Arthur and the Minimoys', 5.00, '15', 'DVD', 2007)";
          addProduct52 = "insert into Product values (120023, 'The Pursuit of Happyness', 5.00, 'G', 'DVD', 2007)";
          addProduct53 = "insert into Product values (120024, 'Van Wilder 2: The Rise of Taj', 5.00, '15', 'DVD', 2007)";
          addProduct54 = "insert into Product values (120025, 'Blood Diamond', 5.00, '15', 'DVD', 2007)";
          addProduct55 = "insert into Product values (120026, 'Deja Vu', 5.00, '15', 'DVD', 2007)";
          addProduct56 = "insert into Product values (120027, 'For Your Consideration', 5.00, '18', 'DVD', 2007)";
          addProduct57 = "insert into Product values (120028, 'The Fountain', 5.00, 'PG', 'DVD', 2007)";
          addProduct58 = "insert into Product values (120029, 'Bobby', 5.00, '15', 'DVD', 2007)";
          addProduct59 = "insert into Product values (130001, 'Need for Special Carbon', 5.00, '15', 'Playstation 2 Game', 2006)";
          addProduct60 = "insert into Product values (130002, 'Need for Special Carbon', 5.00, '15', 'Nintendo DS Game', 2006)";
          addProduct61 = "insert into Product values (130003, 'Need for Special Carbon', 5.00, '15', 'PSP Game', 2006)";
          addProduct62 = "insert into Product values (130004, 'Need for Special Carbon', 5.00, '15', 'Xbox 360 Game', 2006)";
          addProduct63 = "insert into Product values (130005, 'EYETOY Play SPORTS', 5.00, '15', 'Playstation 2 Game', 2006)";
          addProduct64 = "insert into Product values (130006, 'Family Fun With Playstation 2', 5.00, '15', 'Playstation 2 Game', 2006)";
          addProduct65 = "insert into Product values (130007, 'Smackdown v Raw 07', 5.00, '15', 'Playstation 2 Game', 2006)";
          addProduct66 = "insert into Product values (130008, 'Smackdown v Raw 07', 5.00, '15', 'PSP Game', 2006)";
          addProduct67 = "insert into Product values (130009, 'Smackdown v Raw 07', 5.00, '15', 'Xbox 360 Game', 2006)";
          addProduct68 = "insert into Product values (130010, 'Sinister Legends', 5.00, '15', 'Playstation 2 Game', 2006)";
          addProduct69 = "insert into Product values (130011, 'Pro Evolution Soccer 6', 5.00, '15', 'Playstation 2 Game', 2006)";
          addProduct70 = "insert into Product values (130012, 'Pro Evolution Soccer 6', 5.00, '15', 'PSP Game', 2006)";
          addProduct71 = "insert into Product values (130013, 'Pro Evolution Soccer 6', 5.00, '15', 'Xbox 360 Game', 2006)";
          addProduct72 = "insert into Product values (130014, 'BUZZ Jungle Party', 5.00, '15', 'Playstation 2 Game', 2006)";
          addProduct73 = "insert into Product values (130015, 'FIFA 07', 5.00, '15', 'Playstation 2 Game', 2006)";
          addProduct74 = "insert into Product values (130016, 'Killzone Liberation', 5.00, '15', 'PSP Game', 2006)";
          addProduct75 = "insert into Product values (130017, 'Gangs of London', 5.00, '15', 'PSP Game', 2006)";
          addProduct76 = "insert into Product values (130018, 'FIFA 07', 5.00, '15', 'PSP Game', 2006)";
          addProduct77 = "insert into Product values (130019, 'Passport to Amsterdam', 5.00, '15', 'PSP Game', 2006)";
          addProduct78 = "insert into Product values (130020, 'Tiger Woods 07', 5.00, '15', 'Playstation 2 Game', 2006)";
          addProduct79 = "insert into Product values (130021, 'Tiger Woods 07', 4.90, '15', 'PSP Game', 2006)";
          addProduct80 = "insert into Product values (130022, 'Tiger Woods 07', 4.90, '15', 'Xbox 360 Game', 2006)";
          addProduct81 = "insert into Product values (130023, 'Madden NFL 07', 4.90, '15', 'Playstation 2 Game', 2006)";
          addProduct82 = "insert into Product values (130024, 'Madden NFL 07', 4.90, '15', 'Nintendo DS Game', 2006)";
          addProduct83 = "insert into Product values (130025, 'Madden NFL 07', 4.90, '15', 'PSP Game', 2006)";
          addProduct84 = "insert into Product values (130026, 'Madden NFL 07', 4.90, '15', 'Xbox 360 Game', 2006)";
          addProduct85 = "insert into Product values (130027, 'Gears of War', 4.90, '15', 'Xbox 360 Game', 2006)";
          addProduct86 = "insert into Product values (130028, 'Star Trek: Legacy', 4.90, '15', 'Xbox 360 Game', 2006)";
          addProduct87 = "insert into Product values (130029, 'Tekken: Dark Ressurection', 4.90, '15', 'PSP Game', 2006)";
          addProduct88 = "insert into Product values (130030, 'GTA Vice city stories PSP', 4.90, '15', 'PSP Game', 2006)";
          addProduct89 = "insert into Product values (130031, 'Star Trek: Encounters', 5.00, '15', 'Playstation 2 Game', 2007)";
          addProduct90 = "insert into Product values (130032, 'Star Trek: Shattered Universe', 5.00, '15', 'Xbox 360 Game', 2007)";
          addProduct91 = "insert into Product values (130033, 'Star Trek Voyager: Elite Force', 5.00, '15', 'Playstation 2 Game', 2007)";
          addProduct92 = "insert into Product values (130034, 'Battlestar Galactica', 5.00, '15', 'Xbox 360 Game', 2007)";
          addProduct93 = "insert into Product values (130035, 'Battlestar Galactica', 5.00, '15', 'Playstation 2 Game', 2007)";
          try {
stmt = con.createStatement();
stmt.executeUpdate(addProduct1);
stmt.executeUpdate(addProduct2);
stmt.executeUpdate(addProduct3);
stmt.executeUpdate(addProduct4);
               stmt.executeUpdate(addProduct5);
stmt.executeUpdate(addProduct6);
          stmt.executeUpdate(addProduct7);
stmt.executeUpdate(addProduct8);
stmt.executeUpdate(addProduct9);
stmt.executeUpdate(addProduct10);
stmt.executeUpdate(addProduct11);
stmt.executeUpdate(addProduct12);
          stmt.executeUpdate(addProduct13);
          stmt.executeUpdate(addProduct14);
stmt.executeUpdate(addProduct15);
stmt.executeUpdate(addProduct16);
stmt.executeUpdate(addProduct17);
          stmt.executeUpdate(addProduct18);
          stmt.executeUpdate(addProduct19);
          stmt.executeUpdate(addProduct20);
          stmt.executeUpdate(addProduct21);
          stmt.executeUpdate(addProduct22);
          stmt.executeUpdate(addProduct23);
          stmt.executeUpdate(addProduct24);
          stmt.executeUpdate(addProduct25);
          stmt.executeUpdate(addProduct26);
          stmt.executeUpdate(addProduct27);
          stmt.executeUpdate(addProduct28);
          stmt.executeUpdate(addProduct29);
          stmt.executeUpdate(addProduct30);
          stmt.executeUpdate(addProduct31);
          stmt.executeUpdate(addProduct32);
          stmt.executeUpdate(addProduct33);
          stmt.executeUpdate(addProduct34);
          stmt.executeUpdate(addProduct35);
          stmt.executeUpdate(addProduct36);
          stmt.executeUpdate(addProduct37);
          stmt.executeUpdate(addProduct38);
          stmt.executeUpdate(addProduct39);
          stmt.executeUpdate(addProduct40);
          stmt.executeUpdate(addProduct41);
          stmt.executeUpdate(addProduct42);
          stmt.executeUpdate(addProduct43);
          stmt.executeUpdate(addProduct44);
          stmt.executeUpdate(addProduct45);
          stmt.executeUpdate(addProduct46);
          stmt.executeUpdate(addProduct47);
          stmt.executeUpdate(addProduct48);
          stmt.executeUpdate(addProduct49);
          stmt.executeUpdate(addProduct50);
          stmt.executeUpdate(addProduct51);
          stmt.executeUpdate(addProduct52);
          stmt.executeUpdate(addProduct53);
          stmt.executeUpdate(addProduct54);
          stmt.executeUpdate(addProduct55);
          stmt.executeUpdate(addProduct56);
          stmt.executeUpdate(addProduct57);
          stmt.executeUpdate(addProduct58);
          stmt.executeUpdate(addProduct59);
          stmt.executeUpdate(addProduct60);
          stmt.executeUpdate(addProduct61);
          stmt.executeUpdate(addProduct62);
          stmt.executeUpdate(addProduct63);
          stmt.executeUpdate(addProduct64);
          stmt.executeUpdate(addProduct65);
          stmt.executeUpdate(addProduct66);
          stmt.executeUpdate(addProduct67);
          stmt.executeUpdate(addProduct68);
          stmt.executeUpdate(addProduct69);
          stmt.executeUpdate(addProduct70);
          stmt.executeUpdate(addProduct71);
          stmt.executeUpdate(addProduct72);
          stmt.executeUpdate(addProduct73);
          stmt.executeUpdate(addProduct74);
          stmt.executeUpdate(addProduct75);
          stmt.executeUpdate(addProduct76);
          stmt.executeUpdate(addProduct77);
          stmt.executeUpdate(addProduct78);
          stmt.executeUpdate(addProduct79);
          stmt.executeUpdate(addProduct80);
          stmt.executeUpdate(addProduct81);
          stmt.executeUpdate(addProduct82);
          stmt.executeUpdate(addProduct83);
          stmt.executeUpdate(addProduct84);
          stmt.executeUpdate(addProduct85);
          stmt.executeUpdate(addProduct86);
          stmt.executeUpdate(addProduct87);
          stmt.executeUpdate(addProduct88);
          stmt.executeUpdate(addProduct89);
          stmt.executeUpdate(addProduct90);
          stmt.executeUpdate(addProduct91);
          stmt.executeUpdate(addProduct92);
          stmt.executeUpdate(addProduct93);
stmt.close();
con.close();
          catch(SQLException ex) {
System.err.println("SQLException: " + ex.getMessage());
public static void addMembers(){
Connection con = getConnection();
String addMember1, addMember2, addMember3, addMember4, addMember5, addMember6, addMember7, addMember8, addMember9, addMember10;
addMember1 = "insert into Member values (1234, 'Ann', 'Smyth', 'Upper Killult, Falcarragh, Co. Donegal', '[phone]', '[phone]', #5/11/85#, #5/12/06#)";
addMember2 = "insert into Member values (2345, 'John', 'Murphy', 'Lower Killult, Falcarragh, Co. Donegal', '[phone]', '[phone]', #4/12/85#, #6/13/06#)";
addMember3 = "insert into Member values (1324, 'James', 'McFadden', 'Lower Ardsbeg, Gortahork, Co. Donegal', '[phone]', '[phone]', #4/11/85#, #6/14/06#)";
addMember4 = "insert into Member values (1235, 'Frankie', 'Ferry', 'Ardsmore, Gortahork, Co. Donegal', '[phone]', '[phone]', #6/13/60#, #6/15/06#)";
addMember5 = "insert into Member values (1236, 'Daniel', 'McKimm', 'Ballyness, Falcarragh, Co. Donegal', '[phone]', '[phone]', #5/14/73#, #6/16/06#)";
addMember6 = "insert into Member values (2346, 'Stephen', 'Doohan', 'Ballyness, Falcarragh, Co. Donegal', '[phone]', '[phone]', #6/13/85#, #5/13/06#)";
addMember7 = "insert into Member values (2347, 'James', 'Ferry', 'Meenlaragh, Gortahork, Co.Donegal', '[phone]', '[phone]', #9/12/85#, #5/14/06#)";
addMember8 = "insert into Member values (2348, 'Liam', 'Cannon', 'Derryconner, Gortahork, Co.Donegal', '[phone]', '[phone]', #4/11/86#, #5/15/06#)";
addMember9 = "insert into Member values (2401, 'Ciaran', 'Ferry', 'Brinalack, Gweedore, Co.Donegal', '[phone]', '[phone]', #9/12/85#, #5/16/06#)";
addMember10 = "insert into Member values (2402, 'Ciaran', 'McGee', 'Derrybeg, Gweedore, Co.Donegal', '[phone]', '[phone]', #9/14/85#, #5/18/06#)";
try {
stmt = con.createStatement();
stmt.executeUpdate(addMember1);
stmt.executeUpdate(addMember2);
stmt.executeUpdate(addMember3);
               stmt.executeUpdate(addMember4);
               stmt.executeUpdate(addMember5);
               stmt.executeUpdate(addMember6);
               stmt.executeUpdate(addMember7);
               stmt.executeUpdate(addMember8);
               stmt.executeUpdate(addMember9);
               stmt.executeUpdate(addMember10);
stmt.close();
con.close();
          catch(SQLException ex) {
System.err.println("SQLException: " + ex.getMessage());
     public static void addRentals(){
Connection con = getConnection();
String addRental1, addRental2, addRental3, addRental4, addRental5, addRental6, addRental7, addRental8, addRental9, addRental10;
addRental1 = "insert into Rental values (110001, 'The Killers - Sams Town', 1234, 'Ann', 'Smyth', #9/01/06#, #9/10/06#, 'Yes', 2.00)";
addRental2 = "insert into Rental values (120001, 'Mission Impossible 3', 2345, 'John', 'Murphy', #9/02/06#, #9/09/06#, 'No', 0.00)";
addRental3 = "insert into Rental values (130001, 'Need for Special Carbon', 1324, 'James', 'McFadden', #9/03/06#, #9/12/06#, 'Yes', 2.00)";
addRental4 = "insert into Rental values (110002, 'Robbie Williams - Rudebox', 1235, 'Frankie', 'Ferry', #9/04/06#, #9/11/06#, 'No', 0.00)";
addRental5 = "insert into Rental values (120015, 'Prime', 1236, 'Daniel', 'McKimm', #9/05/06#, #9/14/06#, 'Yes', 2.00)";
addRental6 = "insert into Rental values (130015, 'FIFA 07', 2346, 'Stephen', 'Doohan', #9/06/06#, #9/13/06#, 'No', 0.00)";
addRental7 = "insert into Rental values (110009, 'Roxette - Roxette hits', 2347, 'James', 'Ferry', #9/07/06#, #9/16/06#, 'Yes', 2.00)";
addRental8 = "insert into Rental values (120003, 'The Break Up', 2348, 'Liam', 'Cannon', #9/08/06#, #9/15/06#, 'No', 0.00)";
addRental9 = "insert into Rental values (130027, 'Gears of War', 2401, 'Ciaran', 'Ferry', #9/09/06#, #9/18/06#, 'Yes', 2.00)";
addRental10 = "insert into Rental values (110021, 'Scooter - Mind the Gap', 2402, 'Ciaran', 'McGee', #9/10/06#, #9/17/06#, 'No', 0.00)";
try {
stmt = con.createStatement();
stmt.executeUpdate(addRental1);
stmt.executeUpdate(addRental2);
stmt.executeUpdate(addRental3);
               stmt.executeUpdate(addRental4);
               stmt.executeUpdate(addRental5);
               stmt.executeUpdate(addRental6);
               stmt.executeUpdate(addRental7);
               stmt.executeUpdate(addRental8);
               stmt.executeUpdate(addRental9);
               stmt.executeUpdate(addRental10);
stmt.close();
con.close();
          catch(SQLException ex) {
System.err.println("SQLException: " + ex.getMessage());
public Demo(){
super("Demo Test Frame");
setSize(350, 200);
comboBox = new JComboBox();
comboBox.addItem("jdbc:odbc:VideoLibrary");
qtm = new QueryTableModel();
JTable table = new JTable(qtm);
JScrollPane scrollpane = new JScrollPane(table);
JPanel p1 = new JPanel();
p1.setLayout(new GridLayout(3, 2));
p1.add(comboBox);
p1.add(new JLabel("Enter your query: "));
p1.add(queryField = new JTextField());
p1.add(new JLabel("Click here to send: "));
JButton jb = new JButton("Search");
jb.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
qtm.setHostURL();
qtm.setQuery(queryField.getText().trim());
p1.add(jb);
getContentPane().add(p1, BorderLayout.NORTH);
getContentPane().add(scrollpane, BorderLayout.CENTER);
}//end class
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class LogOn extends JPanel{
     private static JTextField username=null;
     private static JPasswordField password=null;
     private static JButton button=null;
public LogOn(){
          setSize(260,160);
          username=new JTextField(15);
     password=new JPasswordField(15);
          //JPanel pane=new JPanel();
          JLabel usernameLabel=new JLabel("Username: ");
          JLabel passwordLabel=new JLabel("Password: ");
          /*pane.*/add(usernameLabel);
          /*pane.*/add(username);
          /*pane.*/add(passwordLabel);
          /*pane.*/add(password);
          //setContentPane(pane);
          show();
          button=new JButton("Ok");
          add(button);
     button.addActionListener(new ButtonListener());
          JFrame frame=new JFrame("Welcome to Home Entertainment");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     frame.getContentPane().add(new LogOn());
     frame.pack();
     frame.setVisible(true);
     private class ButtonListener implements ActionListener{
     public void actionPerformed(ActionEvent e){
          try{
                    new Demo();
               catch(Exception ex){}     
}

Answer 1

here's the code (again, but it doesn't look as ugly as it did earlier on).
i have three programs, only 2 of which can interact with each other. QueryTestTable.java is used with Demo.java to display data in a JTable. the third program is called LogOn.java. i want to use the LogOn.java (username and password for logging on to the system) program in order to be able to use the other 2 programs. i have to be able to use these programs next week. thank you very much.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.JOptionPane;
import java.sql.*;
public class Demo extends JFrame {
   static String url = "jdbc:odbc:VideoLibrary";
   static Statement stmt;
   static Connection con;
   //declare member variables here
   JTextField hostField;
   JTextField queryField;
   QueryTableModel qtm;
   JComboBox comboBox;
   public static void main(String args[]){
      //new LogOn();
      int choice=-1;
      do{
         choice=getChoice();
         if(choice!=0){
            getSelected(choice);
      }while(choice!=5);
      System.exit(0);
   public static int getChoice(){
      String choice;
      int ch;
      choice = JOptionPane.showInputDialog(null,"1. Maintain product      
      details\n"+"2. Maintain member details\n"+"3. Maintain rental 
      details\n"+"4. View product, member and rental details\n"+"5. Log 
      Off\n\n"+"Enter your choice");
      ch = Integer.parseInt(choice);
      return ch;
   public static void getSelected(int choice){
      if(choice==1){
         addProducts();
      if(choice==2){
         addMembers();
      if(choice==3){
         addRentals();
      if(choice==4){
         Demo test = new Demo();
         test.setVisible(true);
   public static Connection getConnection(){
      try {
         Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
      catch(java.lang.ClassNotFoundException e) {
         System.err.print("ClassNotFoundException: ");
         System.err.println(e.getMessage());
      try {
         con=DriverManager.getConnection(url,"","");
      catch(SQLException ex) {
         System.err.println("SQLException: " + ex.getMessage());
      return con;
   public static void addProducts(){
      Connection con = getConnection();
      String addProduct1, addProduct2;
      addProduct1 = "insert into Product values (110001, 'The Killers -  
      Sams Town', 5.00, 'G', 'CD', 2006)";
      addProduct2 = "insert into Product values (110002, 'Robbie
      Williams - Rudebox', 5.00, 'G', 'CD', 2006)";
      try {
         stmt = con.createStatement();
         stmt.executeUpdate(addProduct1);
         stmt.executeUpdate(addProduct2);
         stmt.close();
         con.close();
      catch(SQLException ex) {
         System.err.println("SQLException: " + ex.getMessage());
   public static void addMembers(){
      Connection con = getConnection();
      String addMember1, addMember2;
      addMember1 = "insert into Member values  
      (1234, 'Ann', 'Smyth', 'Upper Killult, Falcarragh, Co. Donegal', '(074)-
      9135210', '[phone]', #5/11/85#, #5/12/06#)";
      addMember2 = "insert into Member values
      (2345, 'John', 'Murphy', 'Lower Killult, Falcarragh, Co.
      Donegal', '[phone]', '[phone]', #4/12/85#, #6/13/06#)";
      try {
         stmt = con.createStatement();
         stmt.executeUpdate(addMember1);
         stmt.executeUpdate(addMember2);
         stmt.close();
         con.close();
      catch(SQLException ex) {
         System.err.println("SQLException: " + ex.getMessage());
   public static void addRentals(){
      Connection con = getConnection();
      String addRental1, addRental2;
      addRental1 = "insert into Rental values (110001, 'The Killers - 
      Sams Town', 1234, 'Ann', 'Smyth', #9/01/06#, #9/10/06#, 'Yes', 2.00)";
      addRental2 = "insert into Rental values (120001, 'Mission
      Impossible 3', 2345, 'John', 'Murphy', #9/02/06#, #9/09/06#, 'No',
      0.00)";
      try {
         stmt = con.createStatement();
         stmt.executeUpdate(addRental1);
         stmt.executeUpdate(addRental2);
         stmt.close();
         con.close();
      catch(SQLException ex) {
         System.err.println("SQLException: " + ex.getMessage());
   public Demo(){
      super("Demo Test Frame");
      setSize(350, 200);
      comboBox = new JComboBox();
      comboBox.addItem("jdbc:odbc:VideoLibrary");
      qtm = new QueryTableModel();
      JTable table = new JTable(qtm);
      JScrollPane scrollpane = new JScrollPane(table);
      JPanel p1 = new JPanel();
      p1.setLayout(new GridLayout(3, 2));
      p1.add(comboBox);
      p1.add(new JLabel("Enter your query: "));
      p1.add(queryField = new JTextField());
      p1.add(new JLabel("Click here to send: "));
      JButton jb = new JButton("Search");
      jb.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                  qtm.setHostURL();
                  qtm.setQuery(queryField.getText().trim());
      p1.add(jb);
      getContentPane().add(p1, BorderLayout.NORTH);
      getContentPane().add(scrollpane, BorderLayout.CENTER);
}//end class
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class LogOn extends JPanel{
   private static JTextField username=null;
   private static JPasswordField password=null;
   private static JButton button=null;
   public LogOn(){
      setSize(260,160);
      username=new JTextField(15);
      password=new JPasswordField(15);
      //JPanel pane=new JPanel();
      JLabel usernameLabel=new JLabel("Username: ");
      JLabel passwordLabel=new JLabel("Password: ");
      /*pane.*/add(usernameLabel);
      /*pane.*/add(username);
      /*pane.*/add(passwordLabel);
      /*pane.*/add(password);
      //setContentPane(pane);
      show();
      button=new JButton("Ok");
      add(button);
      button.addActionListener(new ButtonListener());
      JFrame frame=new JFrame("Welcome to Home Entertainment");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.getContentPane().add(new LogOn());
      frame.pack();
      frame.setVisible(true);
   private class ButtonListener implements ActionListener{
      public void actionPerformed(ActionEvent e){
         try{
            new Demo();
         catch(Exception ex){}
import java.sql.*;
import java.io.*;
import java.util.Vector;
import javax.swing.*;
import javax.swing.table.*;
public class QueryTableModel extends AbstractTableModel{
   Vector cache; 
   int colCount;
   String[] headers;
   Connection db;
   Statement statement;
   String currentURL;
   public QueryTableModel(){
      cache=new Vector();
      try{
         Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
      catch(Exception e){
         System.out.println("problem loading the driver ");
   public String getColumnName(int i){
      return headers;
public int getColumnCount(){
return colCount;
public int getRowCount(){
return cache.size();
public Object getValueAt(int row, int col){
return ((String[])cache.elementAt(row))[col];
public void setHostURL(){
String url = "jdbc:odbc:VideoLibrary";
closeDB();
try{
db=DriverManager.getConnection(url,"","");
statement=db.createStatement();
catch(Exception e){
System.out.println("Could not initialize the database.");
e.printStackTrace();
public void setQuery(String q){
cache=new Vector();
String s="select * from Product";
try{
ResultSet rs=statement.executeQuery(q);
ResultSetMetaData meta=rs.getMetaData();
colCount=meta.getColumnCount();
headers=new String[colCount];
for(int h=1;h<=colCount;h++){
headers[h-1]=meta.getColumnName(h);
while(rs.next()){
String[] record=new String[colCount];
for(int i=0;i<colCount;i++){
record[i]=rs.getString(i+1);
cache.addElement(record);
fireTableChanged(null);
catch(Exception e){
cache=new Vector();
e.printStackTrace();
public void initDB(String url){
try{
db=DriverManager.getConnection(url);
statement=db.createStatement();
catch(Exception e){
System.out.println("Could not initialize the database.");
e.printStackTrace();
public void closeDB(){
try{
if(statement!=null){
statement.close();
if(db!=null){
db.close();
catch(Exception e){
System.out.println("Could not close the current connection.");
e.printStackTrace();