GridBagLayout problems

Hi everyone...
i m having some problems with GridBagLayout() manager...
Basically my code concerning GBL manager is:
JPanel mainPanel=new JPanel();
GridBagLayout grid=new GridBagLayout();
mainPanel.setLayout(grid);
Now i want to add 2 more panels to mainPanel and add them some constraints...
JPanel subPanel1=new JPanel();
JPanel subPanel2=new JPanel();
GridBagConstraints gbc1=new GridBagConstraints();
gbc1.weightx=1.0;
gbc1.weighty=1.0;
gbc1.gridx=0;
gbc1.gridy=0;
gbc1.insets=new Insets(1,1,1,1);
GridBagConstraints gbc2=new GridBagConstraints();
gbc2.gridx=1;
gbc2.gridy=1;
mainPanel.setBackground(backgroundColors);
mainPanel.add(subPanel1,gbc1);
mainPanel.add(subPanel2,gbc2);
And the problem that i have is that i cant give subPanel1 and subPanel2 some sort of dimensions of mainPanel...like:
subPanel1.setPreferredSize(new Dimension(mainPanel.getWidth()/4,500));
Amm i was surfing the web a bit...found some stuff...but damn i just cant get it to work properly...so if any one has some idea how i can put this together that would be great...thanx!
Basically i would like to have a simple exaple how to use gridBagLayout() if i m using several JPanels, where one is sort of main JPanel and others are layed on top of it using GridBagLayout to manage them.
null

Hi ... thnx for the link....well i sort of managed to set my Components as i wanted them...uhhhhh theres a lot of properties to set...but its a good layout though...thnx for all ur help.

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        super(c, thick, round);
      public Insets getBorderInsets(Component comp){
        return new Insets(0, 0, 0, 0);
    }

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               consoleContainer = consolePane;
               consoleConstraints = new GridBagConstraints();
               // *******Finished********
              //********** All buttons text areas are declared here**********
                //*******for the general tab**********
              JButton generalCreate = new JButton("Create a New Network");
              JButton generalOpen = new JButton("Open an Existing Network");
              JButton generalSave = new JButton("Save the Network");
              JButton generalSaveAs = new JButton("Save As..........");
              JButton generalExit = new JButton("Exit");
              //******END******
             //*******for the console tab
                 //text area          
              JTextArea consoleCode = new JTextArea();
              consoleCode.setEditable(true);
              consoleCode.setMaximumSize(new Dimension(700,400));
              consoleCode.setAlignmentX(0.0f);
                   //text area complete
                 //*******for the Console tab**********
              JButton consoleCompile = new JButton("Compile Code");
              JButton consoleSimulate = new JButton("Simulate Code");
              JButton consoleReset = new JButton("Reset");
              JButton consoleOpen = new JButton("Open script files");
              JButton consoleSave = new JButton("Save script files");
              JButton consoleConvert = new JButton("Convert Script files to graphical form");
              //***************END****************
         //Adding buttons and text areas to there respective tabs
              // for the general tab
              generalContainer.add(generalCreate);
              generalContainer.add(generalOpen);
              generalContainer.add(generalSave);
              generalContainer.add(generalSaveAs);
             generalContainer.add(generalExit);
             //****END****
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              consoleConstraints.fill = GridBagConstraints.BOTH;
              addComp(consoleOpen,0,0,1,1);
              consoleConstraints.fill = GridBagConstraints.BOTH;
              addComp(consoleSave,1,1,1,1);
              consoleConstraints.fill = GridBagConstraints.BOTH;
              addComp(consoleConvert,1,2,1,1);
              consoleConstraints.fill = GridBagConstraints.BOTH;
              addComp(consoleCode,1,0,3,1);
              consoleConstraints.fill = GridBagConstraints.BOTH;
              addComp(consoleCompile,2,0,1,1);
              consoleConstraints.fill = GridBagConstraints.BOTH;
              addComp(consoleSimulate,2,1,1,1);
              consoleConstraints.fill = GridBagConstraints.BOTH;
              addComp(consoleReset,2,2,1,1);
              //****END****
              // adding the tabs
              jtp.addTab("General",null,generalPane,"Choose General Options");
              jtp.addTab("Design",null,designPane,"Design your own network!!");
              jtp.addTab("Console",null,consolePane,"Type commands in console for designing");
              jtp.addTab("Output",null,outputPane,"View output");
              getContentPane().add(jtp, BorderLayout.CENTER);
              //****END****
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         private void addComp( Component c,int row,int column,int width,int height)
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            consoleConstraints.gridx=column;
            consoleConstraints.gridy=row;
            //set gridwidth and grid height
            consoleConstraints.gridwidth=width;
            consoleConstraints.gridheight=height;
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            consoleLayout.setConstraints(c,consoleConstraints);
            consoleContainer.add(c);     
         class TabManager implements ItemListener
              Component tab;
              public TabManager(Component tabToManage)
                   tab = tabToManage;
         public void itemStateChanged(ItemEvent ie)
              int index=jtp.indexOfComponent(tab);
             if (index!=-1)
                  jtp.setEnabledAt(index,ie.getStateChange()== ItemEvent.SELECTED);
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    public static void main(String args[])
         MainForm form = new MainForm();
         form.setVisible(true);
    }

    Thanks for the suggestions. I did away with the GridBagLayout Altogether :-D
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    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    import javax.swing.event.*;
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         JTabbedPane jtp = new JTabbedPane();
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              setSize(800,600);
              setDefaultCloseOperation(EXIT_ON_CLOSE);
              JPanel generalPane = new JPanel();
              generalPane.setLayout(new BoxLayout(generalPane, BoxLayout.Y_AXIS));
              JPanel consolePane = new JPanel();
              consolePane.setLayout(new BoxLayout(consolePane, BoxLayout.Y_AXIS));
              JPanel designPane = new JPanel();
              designPane.setLayout(new BoxLayout(designPane, BoxLayout.Y_AXIS));
              JPanel outputPane = new JPanel();
              outputPane.setLayout(new BoxLayout(outputPane, BoxLayout.Y_AXIS));
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               Container generalContainer;
               FlowLayout layoutGeneral= new FlowLayout();
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               layoutGeneral.setAlignment(FlowLayout.CENTER);
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                consoleContainer = consolePane;
                consoleContainer.setLayout(new BorderLayout() );
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                JPanel buttonPanel1 = new JPanel();
                buttonPanel1.setLayout(new GridLayout(1,3));
                JPanel buttonPanel2 = new JPanel();
                buttonPanel2.setLayout(new GridLayout(1,3));
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              //**Buttons for the general tab**//
              JButton generalCreate = new JButton("Create a New Network");
              JButton generalOpen = new JButton("Open an Existing Network");
              JButton generalSave = new JButton("Save the Network");
              JButton generalSaveAs = new JButton("Save As..........");
              JButton generalExit = new JButton("Exit");
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              JButton consoleCompile = new JButton("Compile");
              JButton consoleRun = new JButton("Run");
              JButton consoleReset = new JButton("Reset");
              JButton consoleOpen = new JButton("Open script files");
              JButton consoleSave = new JButton("Save script files");
              JButton consoleConvert = new JButton("Convert Script files to graphical form");
              //declares the textarea where the code is written
              JTextArea consoleCode = new JTextArea();
              consoleCode.setEditable(true);
              consoleCode.setMaximumSize(new Dimension(500,600));
              consoleCode.setAlignmentX(0.0f);
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              //**Buttons and text pads for the general tab**
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              generalContainer.add(generalOpen);
              generalContainer.add(generalSave);
              generalContainer.add(generalSaveAs);
                 generalContainer.add(generalExit);
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              buttonPanel1.add(consoleSave);
              buttonPanel1.add(consoleConvert);
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              buttonPanel2.add(consoleCompile);
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              jtp.addTab("Design",null,designPane,"Design your own network!!");
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    Here is the code, sorry, didn't see that part before.
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    import java.awt.event.*;
    import java.io.*;
    import javax.swing.*;
    import javax.swing.border.*;
    import javax.media.*;
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    private File file;
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    public static JScrollPane scrollableMediaPanel;
    //public static JFrame navigation = new JFrame("Lessons");
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    public static Component controlsComponent;
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    public static GridBagLayout gbLayout;
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              //return;
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              //if ( controlsComponent != null )
              mediaPanel.remove( controlsComponent );
              mediaPanel.doLayout();
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              if ( e instanceof RealizeCompleteEvent )
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                   //**& adds contentslt to rt **
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                   //scrollableMediaPanel= new JScrollPane(mediaPanel);
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                   gbc.weighty = 0;
                   gbc.fill = GridBagConstraints.NONE;
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                   //mediaPanel.add(controlsComponent);
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                   controlsComponent =
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                   /*if ( controlsComponent != null )
                   //add comp #3
                   addUsingGBL(controlsComponent,4,1,2,1);
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              //**getContenPane().doLayout(); **
              //**setSize(200,700);//(width, Height) **
              //**show(); **
              }//if
         }//controllerUpdate
    }//eventHandler
    public MediaPlayerDemo()
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         //**super( "Demonstrating the Java Media Player" );**
         mediaPanel = new panelBack(background);//instantiate JPanel Object
         gbLayout = new GridBagLayout();
         mediaPanel.setAlignmentY(TOP_ALIGNMENT);
         mediaPanel.setLayout(gbLayout);
                   gbc = new GridBagConstraints();
                   gbc.fill = GridBagConstraints.NONE;
                   //gbc.anchor = GridBagConstraints.NONE;
         //instatiate JButton object
         JButton openFile = new JButton( "Open file to play" );
         //openFile.setBounds(0, 0, 25, 25);
         //openFile.setVisible(true);
         //JBUTTON ActionListener
         openFile.addActionListener
              new ActionListener()
                   public void actionPerformed( ActionEvent e )
                   openFile();
                   createPlayer();
         );//addActionListener
         //add comp #1
         addUsingGBL(openFile,0,1,2,1);
         //set scrollPane
         scrollableMediaPanel = new JScrollPane(mediaPanel,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                   JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS );
         //Set Border
         scrollableMediaPanel.setViewportBorder(new BevelBorder(BevelBorder.RAISED));
    }//Constructor
    private void createPlayer()
         if ( file == null )
              return;
         removePreviousPlayer();
         try
              // create a new player and add listener
              player = Manager.createPlayer( file.toURL() );
              player.addControllerListener( new EventHandler() );
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         catch ( Exception e )
              JOptionPane.showMessageDialog( this,
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                   JOptionPane.ERROR_MESSAGE );
    //Main only useful if creating a container to hold menuPanel
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         app.getContentPane().setLayout(new BorderLayout(0,0));
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              app.getContentPane().add(scrollableMediaPanel, BorderLayout.WEST);
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         app.setSize(1000,700);//(width, height)
         app.show();
         app.addWindowListener
              new WindowAdapter()
                   public void windowClosing( WindowEvent e )
                   System.exit(0);
    private void openFile()
         JFileChooser fileChooser = new JFileChooser();
         fileChooser.setFileSelectionMode(
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         int result = fileChooser.showOpenDialog( this );
         // user clicked Cancel button on dialog
         if ( result == JFileChooser.CANCEL_OPTION )
              file = null;
         else
              file = fileChooser.getSelectedFile();
    private void removePreviousPlayer()
         if ( player == null )
              return;
         player.close();
         if ( visualComponent != null )
              mediaPanel.remove( visualComponent );
         if ( controlsComponent != null )
              mediaPanel.remove( controlsComponent );
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         public class panelBack extends JPanel
              ImageIcon image;
              panelBack(ImageIcon image)
                   super();
                   this.image=image;
              public void paintComponent(Graphics g)
                   image.paintIcon(this,g,0, 0);
         }//panelback
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    gbc = new GridBagConstraints();
         gbc. gridx = row;
         gbc.gridy = column;
         gbc.gridwidth = width;
         gbc.gridheight = height;
         gbLayout.setConstraints(component, gbc);
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         mediaPanel.doLayout();
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        }Edited by: JavaHeroPrince on May 13, 2010 6:58 AM

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    After the weekend I'll re-target sscce.org (and .com and .net which I acquired a little while back) to a different server that's not suffering from the problem. Or if Andrew prefers I'll target a server under his control.

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    [url http://java.sun.com/docs/books/tutorial/uiswing/layout/visual.html]How to Use GridBagLayout
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         int pane_number = 0; // Used to indicate what screen needs to be processed
                                       // like resetting input fields and comboboxes
         boolean abort = false;// Used to indicate if error found to avoid further
                                       // processing/validations
         // Define container, panels and tabbedpane
    Container cntr = getContentPane();
    JTabbedPane tpane = new JTabbedPane();
         JPanel      cbpanel1 , cbpanel2 , cbpanel3,
                   panel1 , panel2 , panel3;
         // Setup constraints and type of layout
         GridBagConstraints constraints = new GridBagConstraints();
         GridBagConstraints constraints1 = new GridBagConstraints();
         GridBagConstraints constraints2 = new GridBagConstraints();
         GridBagConstraints constraints3 = new GridBagConstraints();
         GridBagLayout layout = new GridBagLayout ();
         // Define fonts to be used
         Font labelFont = new Font("Arial",Font.PLAIN,12);
         Font buttonFont = new Font("Arial",Font.BOLD,13);
         // Define labels
         JLabel lbUser      = new JLabel("Enter User ID: " );
         JLabel lbPassword      = new JLabel("Enter Password: ");
         JLabel lbSelectName      = new JLabel("Search Name: " );
         JLabel lbFirstName      = new JLabel("First Name: " );
         JLabel lbLastName      = new JLabel("Last Name: " );
         JLabel lbAddress           = new JLabel("Address: " );
         JLabel lbCity           = new JLabel("City" );
         JLabel lbState           = new JLabel("State: " );
         JLabel lbPostcode      = new JLabel("Postcode" );
    JLabel lbCountry           = new JLabel("Country" );
         JLabel lbEmailAddress      = new JLabel("Email Address: " );
    JLabel lbHomeNumber      = new JLabel("Home Phone No.: " );
    JLabel lbFaxNumber      = new JLabel("Fax No.: " );
         // Define combo boxes in third screen (insert pane)
         JComboBox cbName1          = new JComboBox();
         JComboBox cbPersonId1          = new JComboBox();
         // Define combo boxes in second (update/delete pane)
         JComboBox cbName2          = new JComboBox();
         JComboBox cbPersonId2          = new JComboBox();
         // Define buttons, text fields and password field
         JButton btLogin      = new JButton (login );
         JButton btInsert = new JButton (insert );
         JButton btUpdate      = new JButton (update );
         JButton btDelete      = new JButton (delete );
         JButton btInquire      = new JButton (inquire);
         JButton btClear      = new JButton (clear );
         JPasswordField jpPassword           = new JPasswordField(10 );
         JTextField tfUser           = new JTextField("",10 );
         // Inquiry fields on first screen (inquiry pane)
         JTextField tfFirstName1      = new JTextField("",30);
         JTextField tfLastName1           = new JTextField("",30);
         JTextField      tfAddress1          = new JTextField("",30);
         JTextField      tfCity1 = new JTextField("",15);
         JTextField      tfState1 = new JTextField("",15);
         JTextField      tfPostcode1      = new JTextField("",30);
         JTextField      tfCountry1          = new JTextField("",15 );
    JTextField      tfEmailAddress1      = new JTextField("",30);
    JTextField      tfHomeNumber1      = new JTextField("",15);
         JTextField      tfFaxNumber1           = new JTextField("",15 );
         // Input fields on second screen (update/delete pane)
         JTextField tfFirstName2      = new JTextField("",30);
         JTextField tfLastName2          = new JTextField("",30);
         JTextField      tfAddress2          = new JTextField("",30);
         JTextField      tfCity2 = new JTextField("",15);
         JTextField      tfState2 = new JTextField("",15);
         JTextField      tfPostcode2      = new JTextField("",30);
         JTextField      tfCountry2          = new JTextField("",15 );
    JTextField      tfEmailAddress2      = new JTextField("",30);
    JTextField      tfHomeNumber2      = new JTextField("",15);
         JTextField      tfFaxNumber2      = new JTextField("",15 );
         // Input fields on third screen (insert pane)
         JTextField tfFirstName3      = new JTextField("",30);
         JTextField tfLastName3          = new JTextField("",30);
         JTextField      tfAddress3          = new JTextField("",30);
         JTextField      tfCity3 = new JTextField("",15);
         JTextField      tfState3 = new JTextField("",15);
         JTextField      tfPostcode3      = new JTextField("",30);
         JTextField      tfCountry3          = new JTextField("",15 );
    JTextField      tfEmailAddress3      = new JTextField("",30);
    JTextField      tfHomeNumber3      = new JTextField("",15);
         JTextField      tfFaxNumber3           = new JTextField("",15 );
    //------------------------------------------------------------------------------>>>
    //-----------------------Start Addressbook()------------------------------------>>>
    Addressbook(){
    // define listener after adding items to CB to avoid triggering it
         //     cbName1.addItemListener(new ItemListener());
    // public void itemStateChanged(ItemEvent e){
    //--------------------------END Addressbook constructor------------------------------------->>>
    //------------------------------------------------------------------------------>>>
    //------------------------------------------------------------------------------>>>
    //--------------------Start setupLoginPanel()----------------------------------->>>
         // Setup the login screen
         public void setupLoginPanel(){
              // set application title
         setTitle("Address Book Application");
              // center screen
              setLocation((Toolkit.getDefaultToolkit().getScreenSize().width
                                  - getWidth())/2,
                        (Toolkit.getDefaultToolkit().getScreenSize().height
                             - getHeight())/2);
         panel1 = new JPanel();
              // set screen border
              panel1.setBorder(BorderFactory.createTitledBorder(
                                  BorderFactory.createEtchedBorder(),""));
              // add tabbedpane to panel
              tpane.addTab(tab_login, panel1);
              // add panel to container
              cntr.add(tpane);
              // setup layout as GridBagLayout
              constraints.insets = new Insets(2,2,2,2);
              panel1.setLayout(layout);
              // setup User ID label in display area
              lbUser.setFont(labelFont);
              constraints.ipadx = 2;
              constraints.ipady = 2;
              constraints.gridx = 0;
              constraints.gridy = 0;
              constraints.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbUser, constraints);
              panel1.add(lbUser);
              // setup User ID input field in display area
              tfUser.setFont(labelFont);
              constraints.ipadx = 2;
              constraints.ipady = 2;
              constraints.gridx = 1;
              constraints.gridy = 0;
              constraints.fill = GridBagConstraints.HORIZONTAL;
              layout.setConstraints(tfUser, constraints);
              panel1.add(tfUser);
              // setup Password label in display area
              lbPassword.setFont(labelFont);
              constraints.ipadx = 2;
              constraints.ipady = 2;
              constraints.gridx = 0;
              constraints.gridy = 1;
              constraints.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbPassword, constraints);
              panel1.add(lbPassword);
              // setup Password input field in display area
              jpPassword.setEchoChar('*');
              constraints.ipadx = 2;
              constraints.ipady = 2;
              constraints.gridx = 1;
              constraints.gridy = 1;
              layout.setConstraints(jpPassword, constraints);
              panel1.add(jpPassword);
              // setup Login button in display area
              btLogin.setFont(buttonFont);
              constraints.anchor = GridBagConstraints.WEST;
              constraints.gridy = 3;
              constraints.gridx = 1;
              layout.setConstraints(btLogin, constraints);
              panel1.add(btLogin);
              // setup login button listener
              btLogin.addActionListener(new ButtonHandler());
              // allow ALT L to press login button
              btLogin.setMnemonic('l');
    //--------------------End setupLoginPanel()------------------------------------->>>
    //--------------------Start login()--------------------------------------------->>>
         // Validate user input from the login screen based on information from login
         // table (note: manually create/update your login from table LOGIN).
         public void login(){
              String user = tfUser.getText();
              user = user.trim();
              char[] pw = jpPassword.getPassword();
    String password = new String(pw).trim();
              sql = "SELECT * FROM persons WHERE username='"+
                   user+"' AND password='"+password+"'";
              try{
                   // load MS Access driver
                   Class.forName(driver);
              }catch(java.lang.ClassNotFoundException ex){
                   JOptionPane.showMessageDialog(null,ex.getMessage(), error ,
                        JOptionPane.PLAIN_MESSAGE);
              try{
                   // setup connection to DBMS
                   Connection conn = DriverManager.getConnection(url);
                   // create statement
                   Statement stmt = conn.createStatement();
                   // execute sql statement
                   stmt.execute(sql);
                   ResultSet rs = stmt.getResultSet();
                   boolean recordfound = rs.next();
                   if (recordfound){
                        tpane.removeTabAt(0);
                        showPane1();
                        showPane2();
                        showPane3();
                   else{
                        // username/password invalid
                        JOptionPane.showMessageDialog(null,relogin, error,
                             JOptionPane.INFORMATION_MESSAGE);
                        //clear login and password fields
                        tfUser.setText ("");
                        jpPassword.setText("");
                   conn.close();
              }catch(Exception ex){
                   JOptionPane.showMessageDialog(null,ex.getMessage(), genexception,
                        JOptionPane.INFORMATION_MESSAGE);
    //--------------------End login()----------------------------------------------->>>
    //--------------------Start showPane1()----------------------------------------->>>
         // Setup screen 1(inquiry pane) including labels, input fields, comboboxes.
         // Table PERSONS is read to list inquiry parameters.
         void showPane1(){
              panel1 = new JPanel();
              cbpanel1 = new JPanel();
              // set screen border
              panel1.setBorder(BorderFactory.createTitledBorder(
                                  BorderFactory.createEtchedBorder(),""));
              // add tabbedpane to panel
              tpane.addTab(tab1, panel1);
              // setup layout as GridBagLayout
              constraints1.insets = new Insets(2,2,2,2);
              panel1.setLayout (layout);
              cbpanel1.setLayout (layout);
              // setup Name combobox label
              lbSelectName.setFont(labelFont);
              constraints1.gridx = 0;
              constraints1.gridy = 0;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbSelectName, constraints1);
              panel1.add(lbSelectName);
              // setup Name combobox as search key
              cbName1.setFont(labelFont);
              constraints1.ipady = 10;
              constraints1.gridx = 1;
              constraints1.gridy = 0;
              constraints1.gridwidth = 3;
              constraints1.anchor = GridBagConstraints.WEST;
              constraints1.fill = GridBagConstraints.HORIZONTAL;
              layout.setConstraints(cbName1, constraints1);
              panel1.add(cbName1);
              // setup search combobox (Name and corresponding key)
              cbName1.addItem ("Choose one:");
              cbPersonId1.addItem("0");
              // setup First Name label in display area
              lbFirstName.setFont(labelFont);
              constraints1.gridx = 0;
              constraints1.gridy = 1;
              constraints1.anchor = GridBagConstraints.WEST;
              constraints1.fill = GridBagConstraints.NONE;
              constraints1.gridwidth = 1;
              layout.setConstraints(lbFirstName, constraints1);
              panel1.add(lbFirstName);
              // setup First Name input field in display area
              tfFirstName1.setFont(labelFont);
              tfFirstName1.setEditable(false);
              constraints1.gridx = 1;
              constraints1.gridy = 1;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfFirstName1, constraints1);
              panel1.add(tfFirstName1);
              // setup Last Name label in display area
              lbLastName.setFont(labelFont);
              constraints1.gridx = 2;
              constraints1.gridy = 1;
              constraints1.anchor = GridBagConstraints.WEST;
              constraints1.fill = GridBagConstraints.NONE;
              layout.setConstraints(lbLastName, constraints1);
              panel1.add(lbLastName);
              // setup Last Name input field in display area
              tfLastName1.setFont(labelFont);
              tfLastName1.setEditable(false);
              constraints1.gridx = 3;
              constraints1.gridy = 1;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfLastName1, constraints1);
              panel1.add(tfLastName1);
              // setup Address label in display area
              lbAddress.setFont(labelFont);
              constraints1.gridx = 0;
              constraints1.gridy = 2;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbAddress, constraints1);
              panel1.add(lbAddress);
              // setup Address input field in display area
              tfAddress1.setFont(labelFont);
              tfAddress1.setEditable(false);
              constraints1.gridx = 1;
              constraints1.gridy = 2;
              constraints1.gridwidth = 3;
              constraints1.anchor = GridBagConstraints.WEST;
              constraints1.fill = GridBagConstraints.HORIZONTAL;
              layout.setConstraints(tfAddress1, constraints1);
              panel1.add(tfAddress1);
              // setup City label in display area
              lbCity.setFont(labelFont);
              constraints1.gridx = 0;
              constraints1.gridy = 3;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbCity, constraints1);
              panel1.add(lbCity);
              // setup City input field in display area
              tfCity1.setFont(labelFont);
              tfCity1.setEditable(false);
              constraints1.gridx = 1;
              constraints1.gridy = 3;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfCity1, constraints1);
              panel1.add(tfCity1);
              // setup State label in display area
              lbState.setFont(labelFont);
              constraints1.gridx = 2;
              constraints1.gridy = 3;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbState, constraints1);
              panel1.add(lbState);
              // setup State input field in display area
              tfState1.setFont(labelFont);
              tfState1.setEnabled(false);
              constraints1.gridx = 3;
              constraints1.gridy = 3;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfState1, constraints1);
              panel1.add(tfState1);
              // setup Postcode label in display area
              lbPostcode.setFont(labelFont);
              constraints1.gridx = 0;
              constraints1.gridy = 4;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbPostcode, constraints1);
              panel1.add(lbPostcode);
              // setup Address input field in display area
              tfPostcode1.setFont(labelFont);
              tfPostcode1.setEditable(false);
              constraints1.gridx = 1;
              constraints1.gridy = 4;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfPostcode1, constraints1);
              panel1.add(tfPostcode1);
              // setup Country label in display area
              lbCountry.setFont(labelFont);
              constraints1.gridx = 2;
              constraints1.gridy = 4;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbCountry, constraints1);
              panel1.add(lbCountry);
              // setup Country input field in display area
              tfCountry1.setFont(labelFont);
              tfCountry1.setEditable(false);
              constraints1.gridx = 3;
              constraints1.gridy = 4;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfCountry1, constraints1);
              panel1.add(tfCountry1);
              // setup Email Address label in display area
              lbEmailAddress = new JLabel ("Email Address:");
              lbEmailAddress.setFont(labelFont);
              constraints1.gridx = 0;
              constraints1.gridy = 5;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbEmailAddress, constraints1);
              panel1.add(lbEmailAddress);
              // setup Email Address input field in display area
              tfEmailAddress1.setFont(labelFont);
              constraints1.gridx = 1;
              constraints1.gridy = 5;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfEmailAddress1, constraints1);
              panel1.add(tfEmailAddress1);
              // setup Home Phone Number label in display area
              lbHomeNumber.setFont(labelFont);
              constraints1.gridx = 2;
              constraints1.gridy = 5;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbHomeNumber, constraints1);
              panel1.add(lbHomeNumber);
              // setup Home Phone Number input field in display area
              tfHomeNumber1.setFont(labelFont);
              tfHomeNumber1.setEditable(false);
              constraints1.gridx = 3;
              constraints1.gridy = 5;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfHomeNumber1, constraints1);
              panel1.add(tfHomeNumber1);
              // setup Fax Number label in display area
              lbFaxNumber.setFont(labelFont);
              constraints1.gridx = 0;
              constraints1.gridy = 6;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbFaxNumber, constraints1);
              panel1.add(lbFaxNumber);
              // setup Fax Number input field in display area
              tfFaxNumber1.setFont(labelFont);
              tfFaxNumber1.setEditable(false);
              constraints1.gridx = 1;
              constraints1.gridy = 6;
              constraints1.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfFaxNumber1, constraints1);
              panel1.add(tfFaxNumber1);
    // indicate inquiry pane
              pane_number = 1;
              // read table get the list of names in CB search key
         accessDBInit();
              // define listener after adding items to CB to avoid triggering it
              cbName1.addItemListener(new ComboBoxHandler());
    //--------------------End showPane1()------------------------------------------->>>
    //--------------------Start showPane2()----------------------------------------->>>
         // Setup screen 2(update and delete pane) including labels, input fields,
         // comboboxes, and buttons. Table PERSONS is read to list inquiry parameters.
         void showPane2(){
              panel2 = new JPanel();
              cbpanel2 = new JPanel();
              labelFont = new Font("Arial",Font.PLAIN,12);
              buttonFont = new Font("Arial",Font.BOLD,12);
              // set screen border
              panel2.setBorder(BorderFactory.createTitledBorder(
                   BorderFactory.createEtchedBorder(),""));
              // add tabbedpane to panel
              tpane.addTab(tab2, panel2);
              // setup layout as GridBagLayout
              constraints2.insets = new Insets(2,2,2,2);
              panel2.setLayout (layout);
              cbpanel2.setLayout (layout);
              // setup Name combobox label
              lbSelectName.setFont(labelFont);
              constraints2.gridx = 0;
              constraints2.gridy = 0;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbSelectName, constraints2);
              panel1.add(lbSelectName);
              // setup Name combobox as search key
              cbName2.setFont(labelFont);
              constraints2.ipady = 10;
              constraints2.gridx = 1;
              constraints2.gridy = 0;
              constraints2.gridwidth = 3;
              constraints2.anchor = GridBagConstraints.WEST;
              constraints2.fill = GridBagConstraints.HORIZONTAL;
              layout.setConstraints(cbName1, constraints2);
              panel1.add (cbName1);
              // setup search combobox (Name and corresponding key)
              cbName1.addItem ("Choose one:");
              cbPersonId1.addItem("0");
              // setup First Name label in display area
              lbFirstName.setFont(labelFont);
              constraints2.gridx = 0;
              constraints2.gridy = 1;
              constraints2.anchor = GridBagConstraints.WEST;
              constraints2.fill = GridBagConstraints.NONE;
              constraints2.gridwidth = 1;
              layout.setConstraints(lbFirstName, constraints2);
              panel1.add(lbFirstName);
              // setup First Name input field in display area
              tfFirstName2.setFont(labelFont);
              tfFirstName2.setEditable(false);
              constraints2.gridx = 1;
              constraints2.gridy = 1;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfFirstName2, constraints2);
              panel1.add(tfFirstName2);
              // setup Last Name label in display area
              lbLastName.setFont(labelFont);
              constraints2.gridx = 2;
              constraints2.gridy = 1;
              constraints2.anchor = GridBagConstraints.WEST;
              constraints2.fill = GridBagConstraints.NONE;
              layout.setConstraints(lbLastName, constraints2);
              panel1.add(lbLastName);
              // setup Last Name input field in display area
              tfLastName2.setFont(labelFont);
              tfLastName2.setEditable(false);
              constraints2.gridx = 3;
              constraints2.gridy = 1;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfLastName2, constraints2);
              panel1.add(tfLastName2);
              // setup Address label in display area
              lbAddress.setFont(labelFont);
              constraints2.gridx = 0;
              constraints2.gridy = 2;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbAddress, constraints2);
              panel1.add(lbAddress);
              // setup Address input field in display area
              tfAddress2.setFont(labelFont);
              tfAddress2.setEditable(false);
              constraints2.gridx = 1;
              constraints2.gridy = 2;
              constraints2.gridwidth = 3;
              constraints2.anchor = GridBagConstraints.WEST;
              constraints2.fill = GridBagConstraints.HORIZONTAL;
              layout.setConstraints(tfAddress2, constraints2);
              panel1.add(tfAddress2);
              // setup City label in display area
              lbCity.setFont(labelFont);
              constraints2.gridx = 0;
              constraints2.gridy = 3;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbCity, constraints2);
              panel1.add(lbCity);
              // setup City input field in display area
              tfCity2.setFont(labelFont);
              tfCity2.setEditable(false);
              constraints2.gridx = 1;
              constraints2.gridy = 3;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfCity2, constraints2);
              panel1.add(tfCity2);
              // setup State label in display area
              lbState.setFont(labelFont);
              constraints2.gridx = 2;
              constraints2.gridy = 3;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbState, constraints2);
              panel1.add(lbState);
              // setup State input field in display area
              tfState2.setFont(labelFont);
              tfState2.setEnabled(false);
              constraints2.gridx = 3;
              constraints2.gridy = 3;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfState2, constraints2);
              panel1.add(tfState2);
              // indicate inquiry pane
              pane_number = 1;
              // setup Address label in display area
              lbPostcode.setFont(labelFont);
              constraints2.gridx = 0;
              constraints2.gridy = 4;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbPostcode, constraints2);
              panel1.add(lbPostcode);
              // setup Address input field in display area
              tfPostcode2.setFont(labelFont);
              tfPostcode2.setEditable(false);
              constraints2.gridx = 1;
              constraints2.gridy = 4;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfPostcode2, constraints2);
              panel1.add(tfPostcode2);
              // setup Country label in display area
              lbCountry.setFont(labelFont);
              constraints2.gridx = 2;
              constraints2.gridy = 4;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbCountry, constraints2);
              panel1.add(lbCountry);
              // setup Country input field in display area
              tfCountry2.setFont(labelFont);
              tfCountry2.setEditable(false);
              constraints2.gridx = 3;
              constraints2.gridy = 4;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfCountry2, constraints2);
              panel1.add(tfCountry2);
              // setup Email Address label in display area
              lbEmailAddress = new JLabel ("Email Address:");
              lbEmailAddress.setFont(labelFont);
              constraints2.gridx = 0;
              constraints2.gridy = 5;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbEmailAddress, constraints2);
              panel1.add(lbEmailAddress);
              // setup Email Address input field in display area
              tfEmailAddress2.setFont(labelFont);
              constraints2.gridx = 1;
              constraints2.gridy = 5;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfEmailAddress2, constraints2);
              panel1.add(tfEmailAddress2);
              // setup Home Phone Number label in display area
              lbHomeNumber.setFont(labelFont);
              constraints2.gridx = 2;
              constraints2.gridy = 5;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbHomeNumber, constraints2);
              panel1.add(lbHomeNumber);
              // setup Home Phone Number input field in display area
              tfHomeNumber2.setFont(labelFont);
              tfHomeNumber2.setEditable(false);
              constraints2.gridx = 3;
              constraints2.gridy = 5;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfHomeNumber2, constraints2);
              panel1.add(tfHomeNumber2);
              // setup Fax Number label in display area
              lbFaxNumber.setFont(labelFont);
              constraints2.gridx = 0;
              constraints2.gridy = 6;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbFaxNumber, constraints2);
              panel1.add(lbFaxNumber);
              // setup Fax Number input field in display area
              tfFaxNumber2.setFont(labelFont);
              tfFaxNumber2.setEditable(false);
              constraints2.gridx = 1;
              constraints2.gridy = 6;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfFaxNumber2, constraints2);
              panel1.add(tfFaxNumber2);
              // setup UPDATE button in display area
              btUpdate.setFont(buttonFont);
              constraints2.gridx = 3;
              constraints2.gridy = 7;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(btUpdate, constraints2);
              panel2.add(btUpdate);
              // setup DELETE button in display area
              btDelete.setFont(buttonFont);
              constraints2.gridx = 1;
              constraints2.gridy = 7;
              constraints2.anchor = GridBagConstraints.WEST;
              layout.setConstraints(btDelete, constraints2);
              panel2.add(btDelete);
              btUpdate.addActionListener(new ButtonHandler());
              btDelete.addActionListener(new ButtonHandler());
              // allow ALT U to press update button
              btUpdate.setMnemonic('u');
              // allow ALT D to press delete button
              btDelete.setMnemonic('d');
              // read table get the list of names in combo box search key
    accessDBInit();
              // define listener after adding items to CB to avoid triggering it
              cbName2.addItemListener(new ComboBoxHandler());
    //--------------------End showPane2()------------------------------------------->>>
    //--------------------Start showPane3()----------------------------------------->>>
         // Setup screen 2(insert pane) including labels, input fields, comboboxes,
         // and buttons.
         void showPane3(){
              panel3      = new JPanel();
              // set screen border
              panel3.setBorder(BorderFactory.createTitledBorder(
                   BorderFactory.createEtchedBorder(),""));
              // add tabbedpane to panel
              tpane.addTab(tab3, panel3);
              // setup layout as GridBagLayout
              constraints3.insets = new Insets(2,2,2,2);
              panel3.setLayout (layout);
              // setup First Name label in display area
              JLabel lbFirstName = new JLabel("First Name:");
              lbFirstName.setFont(labelFont);
              constraints3.gridx = 0;
              constraints3.gridy = 0;
              constraints3.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbFirstName, constraints3);
              panel3.add(lbFirstName);
              // setup First Name input field in display area
              tfFirstName3.setFont(labelFont);
              constraints3.ipady = 8; // adjust heigth of input field
              constraints3.gridx = 1;
              constraints3.gridy = 0;
              constraints3.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfFirstName3, constraints3);
              panel3.add(tfFirstName3);
              // setup Last Name label in display area
              lbLastName = new JLabel("Last Name: ");
              lbLastName.setFont(labelFont);
              constraints3.gridx = 2;
              constraints3.gridy = 0;
              constraints3.anchor = GridBagConstraints.WEST;
              layout.setConstraints(lbLastName, constraints3);
              panel3.add(lbLastName);
              // setup Last Name input field in display area
              tfLastName3.setFont(labelFont);
              constraints3.gridx = 3;
              constraints3.gridy = 0;
              constraints3.anchor = GridBagConstraints.WEST;
              layout.setConstraints(tfLastName3, constraints3);
              panel3.add(tfLastName3);
              // setup Middle Name label in display area
              lbAddress = new JLabel("Address: ");
              lbAddress.setFont(labelFont);
              constraints3.gridx = 0;
              constraints3.gridy = 1;
              constraints3.anch

    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    public class andy extends JFrame {
      // Define constant variables
      final static String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
      final static String url = "jdbc:odbc:addBKTAFE";
      final static String login = "LOG-IN";
      final static String tab_login = "Log-in";
      final static String tab1 = "INQUIRE Personnel Details";
      final static String tab2 = "UPDATE/DELETE Personnel Details";
      final static String tab3 = "INSERT Personnel Details";
      final static String tab4 = "PRINT";
      final static String insert = "SAVE RECORD";
      final static String update = "UPDATE RECORD";
      final static String delete = "DELETE RECORD";
      final static String inquire = "INQUIRE RECORD";
      final static String clear = " CLEAR ";
      final static String relogin = "Log-in failed! Please relog-in!";
      final static String norecfound = "No Record Found!";
      final static String recinserted = "Record Inserted!";
      final static String recupdated = "Record Updated!";
      final static String recdeleted = "Record Deleted!";
      final static String numericerror = "Age should be numeric!";
      final static String information = "INFORMATION";
      final static String error = "ERROR";
      final static String genexception = "GENERAL EXCEPTION";
      final static String sqlexception = "SQL EXCEPTION";
      final static String confdelete = "CONFIRM DELETE";
      final static String slash = "/";
      final static String table1 = "persons";
      final static String table2 = "Addresses";
      // Define container, panels and tabbedpane
      Container cntr = getContentPane();
      JTabbedPane tpane = new JTabbedPane();
      JPanel cbpanel1 , cbpanel2 , cbpanel3,
             panel1 , panel2 , panel3, panel4;
      // Define fonts to be used
      Font labelFont = new Font("Arial",Font.PLAIN,12);
      Font buttonFont = new Font("Arial",Font.BOLD,13);
      // Define labels
      JLabel lbUser = new JLabel("Enter User ID: " );
      JLabel lbPassword = new JLabel("Enter Password: ");
      JLabel lbSelectName = new JLabel("Search Name: " );
      JLabel lbFirstName = new JLabel("First Name: " );
      JLabel lbLastName = new JLabel("Last Name: " );
      JLabel lbAddress = new JLabel("Address: " );
      JLabel lbCity = new JLabel("City: " );
      JLabel lbState = new JLabel("State: " );
      JLabel lbPostcode = new JLabel("Postcode: " );
      JLabel lbCountry = new JLabel("Country: " );
      JLabel lbEmailAddress = new JLabel("Email Address: " );
      JLabel lbHomeNumber = new JLabel("Home Phone No.: " );
      JLabel lbFaxNumber = new JLabel("Fax No.: " );
      // Define combo boxes in third screen (insert pane)
      JComboBox cbName1     = new JComboBox();
      JComboBox cbName2     = new JComboBox();
      JComboBox cbName3     = new JComboBox();
      JComboBox cbPersonId1 = new JComboBox();
      JComboBox cbPersonId2 = new JComboBox();
      JComboBox cbPersonId3 = new JComboBox();
      // Inquiry fields on first screen (inquiry pane)
      JTextField tfFirstName1 = new JTextField("",30);
      JTextField tfLastName1 = new JTextField("",30);
      JTextField tfAddress1 = new JTextField("",30);
      JTextField tfCity1 = new JTextField("",15);
      JTextField tfState1 = new JTextField("",15);
      JTextField tfPostcode1 = new JTextField("",30);
      JTextField tfCountry1 = new JTextField("",15 );
      JTextField tfEmailAddress1 = new JTextField("",30);
      JTextField tfHomeNumber1 = new JTextField("",15);
      JTextField tfFaxNumber1 = new JTextField("",15 );
      // Input fields on second screen (update/delete pane)
      JTextField tfFirstName2 = new JTextField("",30);
      JTextField tfLastName2 = new JTextField("",30);
      JTextField tfAddress2 = new JTextField("",30);
      JTextField tfCity2 = new JTextField("",15);
      JTextField tfState2 = new JTextField("",15);
      JTextField tfPostcode2 = new JTextField("",30);
      JTextField tfCountry2 = new JTextField("",15);
      JTextField tfEmailAddress2 = new JTextField("",30);
      JTextField tfHomeNumber2 = new JTextField("",15);
      JTextField tfFaxNumber2 = new JTextField("",15);
      // Input fields on third screen (inset details pane)
      JTextField tfFirstName3 = new JTextField("",30);
      JTextField tfLastName3 = new JTextField("",30);
      JTextField tfAddress3 = new JTextField("",30);
      JTextField tfCity3 = new JTextField("",15);
      JTextField tfState3 = new JTextField("",15);
      JTextField tfPostcode3 = new JTextField("",30);
      JTextField tfCountry3 = new JTextField("",15);
      JTextField tfEmailAddress3 = new JTextField("",30);
      JTextField tfHomeNumber3 = new JTextField("",15);
      JTextField tfFaxNumber3 = new JTextField("",15);
      GridBagLayout layout = new GridBagLayout();
      GridBagConstraints constraints = new GridBagConstraints();
      public andy() {
        super("Address Book Application");
        showPane1();
        showPane2();
        showPane3();
        showPane4();
        cntr.add(tpane, "Center");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(900,385);
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        setLocation((screenSize.width  - getWidth())/2,
                    (screenSize.height - getHeight())/2);
        setVisible(true);
      // Setup screen 1(inquiry pane) including labels, input fields, comboboxes.
      // Table PERSONS is read to list inquiry parameters.
      void showPane1() {
        panel1 = new JPanel();
        cbpanel1 = new JPanel();
        // set screen border
        panel1.setBorder(BorderFactory.createTitledBorder(
          BorderFactory.createEtchedBorder(),""));
        // add tabbedpane to panel
        tpane.addTab(tab1, panel1);
        // setup layout as GridBagLayout
        constraints.insets = new Insets(2,2,2,2);
        panel1.setLayout (layout);
        cbpanel1.setLayout (layout);
        // setup Name combobox label
        lbSelectName.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        layout.setConstraints(lbSelectName, constraints);
        panel1.add(lbSelectName);
        // setup Name combobox as search key
        cbName1.setFont(labelFont);
        constraints.ipady = 10;
        constraints.gridwidth = constraints.REMAINDER;
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(cbName1, constraints);
        panel1.add(cbName1);
        // setup search combobox (Name and corresponding key)
        cbName1.addItem ("Choose one:");
        cbPersonId1.addItem("0");
        // setup First Name label in display area
        lbFirstName.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbFirstName, constraints);
        panel1.add(lbFirstName);
        // setup First Name input field in display area
        tfFirstName1.setFont(labelFont);
        tfFirstName1.setEditable(false);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfFirstName1, constraints);
        panel1.add(tfFirstName1);
        // setup Last Name label in display area
        lbLastName.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbLastName, constraints);
        panel1.add(lbLastName);
        // setup Last Name input field in display area
        tfLastName1.setFont(labelFont);
        tfLastName1.setEditable(false);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfLastName1, constraints);
        panel1.add(tfLastName1);
        // setup Address label in display area
        lbAddress.setFont(labelFont);
        constraints.gridwidth = 1;
        constraints.anchor = GridBagConstraints.EAST;
        layout.setConstraints(lbAddress, constraints);
        panel1.add(lbAddress);
        // setup Address input field in display area
        tfAddress1.setFont(labelFont);
        tfAddress1.setEditable(false);
        constraints.gridwidth = constraints.REMAINDER;
        constraints.anchor = GridBagConstraints.WEST;
        constraints.weightx = 1.0;
        constraints.fill = GridBagConstraints.HORIZONTAL;
        layout.setConstraints(tfAddress1, constraints);
        panel1.add(tfAddress1);
        // setup City label in display area
        lbCity.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        constraints.fill = GridBagConstraints.NONE;
            layout.setConstraints(lbCity, constraints);
        panel1.add(lbCity);
        // setup City input field in display area
        tfCity1.setFont(labelFont);
        tfCity1.setEditable(false);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfCity1, constraints);
        panel1.add(tfCity1);
        // setup State label in display area
        lbState.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbState, constraints);
        panel1.add(lbState);
        // setup State input field in display area
        tfState1.setFont(labelFont);
        tfState1.setEnabled(false);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfState1, constraints);
        panel1.add(tfState1);
        // setup Postcode label in display area
        lbPostcode.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbPostcode, constraints);
        panel1.add(lbPostcode);
        // setup Address input field in display area
        tfPostcode1.setFont(labelFont);
        tfPostcode1.setEditable(false);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfPostcode1, constraints);
        panel1.add(tfPostcode1);
        // setup Country label in display area
        lbCountry.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbCountry, constraints);
        panel1.add(lbCountry);
        // setup Country input field in display area
        tfCountry1.setFont(labelFont);
        tfCountry1.setEditable(false);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfCountry1, constraints);
        panel1.add(tfCountry1);
        // setup Email Address label in display area
        lbEmailAddress.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbEmailAddress, constraints);
        panel1.add(lbEmailAddress);
        // setup Email Address input field in display area
        tfEmailAddress1.setFont(labelFont);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfEmailAddress1, constraints);
        panel1.add(tfEmailAddress1);
        // setup Home Phone Number label in display area
        lbHomeNumber.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbHomeNumber, constraints);
        panel1.add(lbHomeNumber);
        // setup Home Phone Number input field in display area
        tfHomeNumber1.setFont(labelFont);
        tfHomeNumber1.setEditable(false);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfHomeNumber1, constraints);
        panel1.add(tfHomeNumber1);
        // setup Fax Number label in display area
        lbFaxNumber.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbFaxNumber, constraints);
        panel1.add(lbFaxNumber);
        // setup Fax Number input field in display area
        tfFaxNumber1.setFont(labelFont);
        tfFaxNumber1.setEditable(false);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfFaxNumber1, constraints);
        panel1.add(tfFaxNumber1);
        // indicate inquiry pane
        // pane_number = 1;
        // read table get the list of names in CB search key
        // accessDBInit();
        // define listener after adding items to CB to avoid triggering it
        // cbName1.addItemListener(new ComboBoxHandler());
      //--------------------End showPane1()------------------------------------------->>>
      //--------------------Start showPane2()----------------------------------------->>>
      void showPane2() {
        panel2 = new JPanel();
        cbpanel2 = new JPanel();
        // set screen border
        panel2.setBorder(BorderFactory.createTitledBorder(
          BorderFactory.createEtchedBorder(),""));
        // add tabbedpane to panel
        tpane.addTab(tab2, panel2);
        // setup layout as GridBagLayout
        constraints.ipady = 0;
        panel2.setLayout (layout);
        cbpanel2.setLayout (layout);
        // setup Name combobox label
        lbSelectName = new JLabel("Search Name: ");
        lbSelectName.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        layout.setConstraints(lbSelectName, constraints);
        panel2.add(lbSelectName);
        // setup Name combobox as search key
        cbName2.setFont(labelFont);
        constraints.ipady = 10;
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(cbName2, constraints);
        panel2.add(cbName2);
        // setup search combobox (Name and corresponding key)
        cbName2.addItem ("Choose one:");
        cbPersonId2.addItem("0");
        // setup UPDATE button in display area
        JButton btUpdate = new JButton("Update");
        btUpdate.setFont(buttonFont);
    //    btUpdate.addActionListener(new ButtonHandler());
        btUpdate.setMnemonic(KeyEvent.VK_U);
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(btUpdate, constraints);
        panel2.add(btUpdate);
        // setup DELETE button in display area
        JButton btDelete = new JButton("Delete");
        btDelete.setFont(buttonFont);
    //    btDelete.addActionListener(new ButtonHandler());
        btDelete.setMnemonic(KeyEvent.VK_D);
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(btDelete, constraints);
        panel2.add(btDelete);
        // setup First Name label in display area
        lbFirstName = new JLabel("First Name: ");
        lbFirstName.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbFirstName, constraints);
        panel2.add(lbFirstName);
        // setup First Name input field in display area
        tfFirstName2.setFont(labelFont);
        tfFirstName2.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfFirstName2, constraints);
        panel2.add(tfFirstName2);
        // setup Last Name label in display area
        lbLastName = new JLabel("Last Name: ");
        lbLastName.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbLastName, constraints);
        panel2.add(lbLastName);
        // setup Last Name input field in display area
        tfLastName2.setFont(labelFont);
        tfLastName2.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfLastName2, constraints);
        panel2.add(tfLastName2);
        // setup Address label in display area
        lbAddress = new JLabel("Address: ");
        lbAddress.setFont(labelFont);
        constraints.gridwidth = 1;
        constraints.anchor = GridBagConstraints.EAST;
        layout.setConstraints(lbAddress, constraints);
        panel2.add(lbAddress);
        // setup Address input field in display area
        tfAddress2.setFont(labelFont);
        tfAddress2.setEditable(true);
        constraints.gridwidth = constraints.REMAINDER;
        constraints.anchor = GridBagConstraints.WEST;
        constraints.weightx = 1.0;
        constraints.fill = GridBagConstraints.HORIZONTAL;
        layout.setConstraints(tfAddress2, constraints);
        panel2.add(tfAddress2);
        // setup City label in display area
        lbCity = new JLabel("City: ");
        lbCity.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        constraints.fill = GridBagConstraints.NONE;
        layout.setConstraints(lbCity, constraints);
        panel2.add(lbCity);
        // setup City input field in display area
        tfCity2.setFont(labelFont);
        tfCity2.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfCity2, constraints);
        panel2.add(tfCity2);
        // setup State label in display area
        lbState = new JLabel("State: ");
        lbState.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbState, constraints);
        panel2.add(lbState);
        // setup State input field in display area
        tfState2.setFont(labelFont);
        tfState2.setEnabled(true);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfState2, constraints);
        panel2.add(tfState2);
        // setup Postcode label in display area
        lbPostcode = new JLabel("Postcode: ");
        lbPostcode.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbPostcode, constraints);
        panel2.add(lbPostcode);
        // setup Address input field in display area
        tfPostcode2.setFont(labelFont);
        tfPostcode2.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfPostcode2, constraints);
        panel2.add(tfPostcode2);
        // setup Country label in display area
        lbCountry = new JLabel("Country: ");
        lbCountry.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbCountry, constraints);
        panel2.add(lbCountry);
        // setup Country input field in display area
        tfCountry2.setFont(labelFont);
        tfCountry2.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfCountry2, constraints);
        panel2.add(tfCountry2);
        // setup Email Address label in display area
        lbEmailAddress = new JLabel ("Email Address: ");
        lbEmailAddress.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbEmailAddress, constraints);
        panel2.add(lbEmailAddress);
        // setup Email Address input field in display area
        tfEmailAddress2.setFont(labelFont);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfEmailAddress2, constraints);
        panel2.add(tfEmailAddress2);
        // setup Home Phone Number label in display area
        lbHomeNumber = new JLabel("Home Phone No.: ");
        lbHomeNumber.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbHomeNumber, constraints);
        panel2.add(lbHomeNumber);
        // setup Home Phone Number input field in display area
        tfHomeNumber2.setFont(labelFont);
        tfHomeNumber2.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfHomeNumber2, constraints);
        panel2.add(tfHomeNumber2);
        // setup Fax Number label in display area
        lbFaxNumber = new JLabel("Fax No.: ");
        lbFaxNumber.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbFaxNumber, constraints);
        panel2.add(lbFaxNumber);
        // setup Fax Number input field in display area
        tfFaxNumber2.setFont(labelFont);
        tfFaxNumber2.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfFaxNumber2, constraints);
        panel2.add(tfFaxNumber2);
      //-----------------------------End showpane2()---------------------------------->>
      //--------------------Start showPane3()----------------------------------------->>>
      void showPane3() {
        panel3 = new JPanel();
        // cbpanel3 = new JPanel();
        // set screen border
        panel3.setBorder(BorderFactory.createTitledBorder(
          BorderFactory.createEtchedBorder(),""));
        // add tabbedpane to panel
        tpane.addTab(tab3, panel3);
        // setup layout as GridBagLayout
        panel3.setLayout(layout);
        constraints.ipady = 0;
        panel3.setLayout (layout);
        // cbpanel3.setLayout (layout);
        // setup Name combobox label
        lbSelectName = new JLabel("Search Name: ");
        lbSelectName.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        layout.setConstraints(lbSelectName, constraints);
        panel3.add(lbSelectName);
        // setup Name combobox as search key
        cbName3 = new JComboBox();
        cbName3.setFont(labelFont);
        constraints.ipady = 10;
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(cbName3, constraints);
        panel3.add(cbName3);
        // setup search combobox (Name and corresponding key)
        cbName3.addItem ("Choose one:");
        cbPersonId3.addItem("0");
        // setup INSERT button in display area
        JButton btInsert = new JButton("Insert");
        btInsert.setFont(buttonFont);
    //    btInsert.addActionListener(new ButtonListener());
        btInsert.setMnemonic(KeyEvent.VK_S);
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(btInsert, constraints);
        panel3.add(btInsert);
        // setup CLEAR button in display area
        JButton btClear = new JButton("Clear");
        btClear.setFont(buttonFont);
    //    btClear.addActionListener(new ButtonListener());
        btClear.setMnemonic(KeyEvent.VK_C);
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(btClear, constraints);
        panel3.add(btClear);
        // setup First Name label in display area
        lbFirstName = new JLabel("First Name: ");
        lbFirstName.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbFirstName, constraints);
        panel3.add(lbFirstName);
        // setup First Name input field in display area
        tfFirstName3.setFont(labelFont);
        tfFirstName3.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfFirstName3, constraints);
        panel3.add(tfFirstName3);
        // setup Last Name label in display area
        lbLastName = new JLabel("Last Name: ");
        lbLastName.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbLastName, constraints);
        panel3.add(lbLastName);
        // setup Last Name input field in display area
        tfLastName3.setFont(labelFont);
        tfLastName3.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfLastName3, constraints);
        panel3.add(tfLastName3);
        // setup Address label in display area
        lbAddress = new JLabel("Address: ");
        lbAddress.setFont(labelFont);
        constraints.gridwidth = 1;
        constraints.anchor = GridBagConstraints.EAST;
        layout.setConstraints(lbAddress, constraints);
        panel3.add(lbAddress);
        // setup Address input field in display area
        tfAddress3.setFont(labelFont);
        tfAddress3.setEditable(true);
        constraints.gridwidth = constraints.REMAINDER;
        constraints.anchor = GridBagConstraints.WEST;
        constraints.weightx = 1.0;
        constraints.fill = GridBagConstraints.HORIZONTAL;
        layout.setConstraints(tfAddress3, constraints);
        panel3.add(tfAddress3);
        // setup City label in display area
        lbCity = new JLabel("City: ");
        lbCity.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        constraints.fill = GridBagConstraints.NONE;
        layout.setConstraints(lbCity, constraints);
        panel3.add(lbCity);
        // setup City input field in display area
        tfCity3.setFont(labelFont);
        tfCity3.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfCity3, constraints);
        panel3.add(tfCity3);
        // setup State label in display area
        lbState = new JLabel("State: ");
        lbState.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbState, constraints);
        panel3.add(lbState);
        // setup State input field in display area
        tfState3.setFont(labelFont);
        tfState3.setEnabled(true);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfState3, constraints);
        panel3.add(tfState3);
        // setup Postcode label in display area
        lbPostcode = new JLabel("Postcode: ");
        lbPostcode.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbPostcode, constraints);
        panel3.add(lbPostcode);
        // setup Address input field in display area
        tfPostcode3.setFont(labelFont);
        tfPostcode3.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfPostcode3, constraints);
        panel3.add(tfPostcode3);
        // setup Country label in display area
        lbCountry = new JLabel("Country: ");
        lbCountry.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbCountry, constraints);
        panel3.add(lbCountry);
        // setup Country input field in display area
        tfCountry3.setFont(labelFont);
        tfCountry3.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfCountry3, constraints);
        panel3.add(tfCountry3);
        // setup Email Address label in display area
        lbEmailAddress = new JLabel ("Email Address: ");
        lbEmailAddress.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbEmailAddress, constraints);
        panel3.add(lbEmailAddress);
        // setup Email Address input field in display area
        tfEmailAddress3.setFont(labelFont);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfEmailAddress3, constraints);
        panel3.add(tfEmailAddress3);
        // setup Home Phone Number label in display area
        lbHomeNumber = new JLabel("Home Phone No.: ");
        lbHomeNumber.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = constraints.RELATIVE;
        layout.setConstraints(lbHomeNumber, constraints);
        panel3.add(lbHomeNumber);
        // setup Home Phone Number input field in display area
        tfHomeNumber3.setFont(labelFont);
        tfHomeNumber3.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        constraints.gridwidth = constraints.REMAINDER;
        layout.setConstraints(tfHomeNumber3, constraints);
        panel3.add(tfHomeNumber3);
        // setup Fax Number label in display area
        lbFaxNumber = new JLabel("Fax No.: ");
        lbFaxNumber.setFont(labelFont);
        constraints.anchor = GridBagConstraints.EAST;
        constraints.gridwidth = 1;
        layout.setConstraints(lbFaxNumber, constraints);
        panel3.add(lbFaxNumber);
        // setup Fax Number input field in display area
        tfFaxNumber3.setFont(labelFont);
        tfFaxNumber3.setEditable(true);
        constraints.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tfFaxNumber3, constraints);
        panel3.add(tfFaxNumber3);
      //-----------------------------End showpane3()---------------------------------->>
      //-----------------------------Start showPane4()-------------------------------->>
      void showPane4() {
    //    qtm = new QueryTableModel();
    //    JTable table = new JTable(qtm);
    //    String query = "SELECT FirstName, LastName, HomePhone, " +
    //                   "FROM Addresses ORDER By LastName";
    //    qtm.setQuery(query);
        JPanel demoPanel = new JPanel();
        demoPanel.setPreferredSize(new Dimension(400,500));
        demoPanel.setBackground(Color.pink);
        demoPanel.add(new JLabel("Demo Panel in place of table",
                                  SwingConstants.CENTER));
        JScrollPane scrollPane = new JScrollPane(demoPanel);
        panel4 = new JPanel();
    //    pane_number = 4;
        panel4.setLayout(layout);
        constraints.ipady = 0;
    //    labelFont = new Font("Arial", Font.PLAIN, 12);   defined above
        buttonFont = new Font("Arial", Font.PLAIN, 13);
       // set screen border
       panel4.setBorder(
         BorderFactory.createTitledBorder(
           BorderFactory.createEtchedBorder(), ""));
       // add panel to tabbed pane
       tpane.addTab(tab4, panel4);
       JLabel lbPrint = new JLabel("Print");
       lbPrint.setFont(labelFont);
       constraints.anchor = constraints.EAST;
       layout.setConstraints(lbPrint, constraints);
       panel4.add(lbPrint);
       JButton btPrint = new JButton("Print");
       btPrint.setFont(buttonFont);
    //   btPrint.addActionListener(new ButtonListener());
       btPrint.setMnemonic(KeyEvent.VK_P);
       constraints.anchor = constraints.WEST;
       constraints.gridwidth = constraints.REMAINDER;
       layout.setConstraints(btPrint, constraints);
       panel4.add(btPrint);
       constraints.weighty = 1.0;
       constraints.fill = constraints.BOTH;
       constraints.anchor = constraints.CENTER;
       layout.setConstraints(scrollPane, constraints);
       panel4.add(scrollPane);
      public static void main(String[] args) {
        new andy();
    }

  • HELP, HELP, HELP, Problems using GridBagLayout with BorderLayout

    I have a BorderLayout for my application. I created a JPanel that has the following items added to it:
    1)Button
    2)VisualComponent
    3)ControllerComponent
    The JPanel is then added to the WEST Pane of the BorderLayout. My problem is that I can not get my components in the JPanel to display correctly. The items should be added from top to buttom in my JPanel, but they overlap and display side by side, and some don't appear at all until my entire window application is Maximized. It seems as if all my components are trying to display in one row even though I explicitly add them to different rows as follows:
    1)addUsingGBL(openFile,0,1,2,1);
    2)addUsingGBL(visualComponent,1,1,1,3);
    3)addUsingGBL(controlsComponent,4,1,2,1);
    where addUsingGBL is as follows:
    void addUsingGBL(Component component,int row, int column, int width, int height)
    gbc. gridx = row;
    gbc.gridy = column;
    gbc.gridwidth = width;
    gbc.gridheight = height;
    gbLayout.setConstraints(component, gbc);
    mediaPanel.add(component);
    mediaPanel.doLayout();
    If anyone has any suggestions, I would greatly appreciate it. Entire code is available if needed. Thanks!

    void addUsingGBL(Component component,int row, int column, int width, int height)
    gbc. gridx = row;
    gbc.gridy = column;
    gbc.gridwidth = width;
    gbc.gridheight = height;
    gbLayout.setConstraints(component, gbc);
    mediaPanel.add(component);
    mediaPanel.doLayout();
    }I see that the problem is that you are using the same gridbagconstraints reference to add all your components. In effect, all your components refer to the same gridbagconstraints , you are getting all the components on a single row. The solution to this is simple - Try this out and tell me whether that works...
    void addUsingGBL(Component component,int row, int column, int width, int height)
    //Add this line in the beginning...
    gbc = new GridBagConstraints();
    gbc. gridx = row;
    gbc.gridy = column;
    gbc.gridwidth = width;
    gbc.gridheight = height;
    gbLayout.setConstraints(component, gbc);
    mediaPanel.add(component);
    mediaPanel.doLayout();

  • Problem refreshing when using GridBagLayout for a JPanel

    Well, i have a JPanel which use the GridBagLayout to layout the components. If i remove a component everything it's ok, i mean it disappear from the panel, but the appears when i want to add a component. It doesn't show me the new component. Any sugestion?

    Here is the all code:
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    public class Test {
         private JFrame f;
         private final JPanel detalii = new JPanel();
         private String[] sir1 = { "1820620160027", "Bradescu", "M", "Marius-Catalin", "Rovine bl. I29", "0745035150" };
         private String[] sir2 = { "1820620160031", "Bercea", "C", "Florin Bogdan", "Brazda bl. I29", "0745035150" };
         public Test(){
              f = new JFrame( "Test" );
              detalii.setLayout( new GridBagLayout() );
              detalii.setPreferredSize( new Dimension( 450, 400) );
              creazaDetaliiElev( sir2 );
              f.addMouseListener( new MouseAdapter(){
                   public void mouseClicked( MouseEvent evt ){
                        if( evt.getButton() == 1){
                             creazaDetaliiElev( sir1 );
                             //detalii.invalidate();
                             f.repaint();
                        } else {
                             creazaDetaliiElev( sir2 );
                             //detalii.invalidate();
                             f.repaint();
              f.getContentPane().add( detalii );
              f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
              f.pack();
              f.setVisible( true );
         protected void creazaDetaliiElev( String[] elev ){
              if( detalii.getComponentCount() == 0 ){                    
                   GridBagConstraints c = new GridBagConstraints();
                   c.fill = GridBagConstraints.VERTICAL;
                   JLabel lblID = new JLabel( "CNP:");
                   c.anchor = GridBagConstraints.WEST;
                   c.insets = new Insets( 5, 5, 5, 5 );
                   c.gridx = 0;
                   c.gridy = 0;
                   detalii.add( lblID, c );
                   JLabel lblNume = new JLabel( "Nume:" );
                   c.gridx = 0;
                   c.gridy = 1;
                   detalii.add( lblNume, c );
                   JLabel lblInitiala = new JLabel( "Initiala:" );
                   c.gridx = 0;
                   c.gridy = 2;
                   detalii.add( lblInitiala, c );
                   JLabel lblPrenume = new JLabel( "Prenume:" );
                   c.gridx = 0;
                   c.gridy = 3;
                   detalii.add( lblPrenume, c );
                   JLabel lblAdresa = new JLabel( "Adresa" );
                   c.gridx = 0;
                   c.gridy = 4;
                   detalii.add( lblAdresa, c );
                   JLabel lblTelefon = new JLabel( "Telefon:" );
                   c.gridx = 0;
                   c.gridy = 5;
                   detalii.add( lblTelefon, c );
                   JTextField txtID = new JTextField( String.valueOf( elev[ 0 ] ) );
                   txtID.setBackground( Color.WHITE );
                   txtID.setHorizontalAlignment( JTextField.TRAILING );
                   txtID.setEditable( false );
                   c.gridx = 1;
                   c.gridy = 0;
                   detalii.add( txtID, c );
                   JTextField txtNume = new JTextField( elev[ 1 ] );
                   txtNume.setBackground( Color.WHITE );
                   txtNume.setHorizontalAlignment( JTextField.LEADING );
                   txtNume.setEditable( false );
                   c.gridx = 1;
                   c.gridy = 1;
                   detalii.add( txtNume, c );
                   JTextField txtInitiala = new JTextField( elev[ 2 ] );
                   txtInitiala.setBackground( Color.WHITE );
                   txtInitiala.setHorizontalAlignment( JTextField.CENTER );
                   txtInitiala.setEditable( false );
                   c.gridx = 1;
                   c.gridy = 2;
                   detalii.add( txtInitiala, c );
                   JTextField txtPrenume = new JTextField( elev[ 3 ] );
                   txtPrenume.setBackground( Color.WHITE );
                   txtPrenume.setHorizontalAlignment( JTextField.LEADING );
                   txtPrenume.setEditable( false );
                   c.gridx = 1;
                   c.gridy = 3;
                   detalii.add( txtPrenume, c );
                   JTextField txtAdresa = new JTextField( elev[ 4 ] );
                   txtAdresa.setBackground( Color.WHITE );
                   txtAdresa.setHorizontalAlignment( JTextField.LEADING );
                   txtAdresa.setEditable( false );
                   c.gridx = 1;
                   c.gridy = 4;
                   detalii.add( txtAdresa, c );
                   JTextField txtTelefon = new JTextField( elev[ 5 ] );
                   txtTelefon.setBackground( Color.WHITE );
                   txtTelefon.setHorizontalAlignment( JTextField.TRAILING );
                   txtTelefon.setEditable( false );
                   c.gridx = 1;
                   c.gridy = 5;
                   detalii.add( txtTelefon, c );
              } else {
                   detalii.removeAll();
         public static void main( String[] args ){
              new Test();
    , but nothing, as you see i use invalidate() too.

  • See the problem with the GridbagLayout

    See the out put i want small button but it is going wrong.
    there are two program.
    import java.io.*;
    import java.awt.*;
    import java.awt.event.*;
    import java.applet.*;
    import javax.swing.*;
    class frame1 extends JFrame
    JMenu m1;
    JMenuItem m13,m14,m12;
    JMenuBar mbr;
    CardLayout cardLo;     
    JPanel panCon,jp;
    StaticReservation stp;
    KeyStroke k1;     
    public frame1()
         super("Counselling System");
    setExtendedState(JFrame.ICONIFIED);
         Container c=getContentPane();
         cardLo=new CardLayout();
         panCon=new JPanel(cardLo);
         stp=new StaticReservation();     
         panCon.add(stp,"StaticReservation");
         mbr=new JMenuBar();
    setJMenuBar(mbr);
    m1=new JMenu("Office");
    m1.setMnemonic(KeyEvent.VK_O);
    mbr.add(m1);
    m12=new JMenuItem("Static Reservation ");
         m12.setMnemonic(KeyEvent.VK_S);
         k1=KeyStroke.getKeyStroke(KeyEvent.VK_S,8);
         m12.setAccelerator(k1);
         m1.add(m12);
    m14=new JMenuItem("Exit ");
         m14.setMnemonic(KeyEvent.VK_X);
         k1=KeyStroke.getKeyStroke(KeyEvent.VK_X,Event.CTRL_MASK);
         m14.setAccelerator(k1);
         m1.add(m14);
    m14.addActionListener(new Myhandler(this));
    m12.addActionListener(new Myhandler(this));
    c.add(panCon);
    public class Myhandler implements ActionListener
    frame1 f1;
    public Myhandler(frame1 t1)
    this.f1=t1;
    public void actionPerformed(ActionEvent ae)
         if(ae.getSource()==m14)
    System.exit(0);
         if(ae.getSource()==m13)          
              cardLo.show(panCon,"CollegeDetailsPane");
         if(ae.getSource()==m12)          
              cardLo.show(panCon,"StaticReservation");
    public class menu2
    public static void main(String ax[])throws Exception
    frame1 f1=new frame1();
    f1.setExtendedState(JFrame.MAXIMIZED_BOTH);
    f1.setVisible(true);
    f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    /* double h=f1.getHeight();     
    double w=f1.getWidth();     
    System.out.println(" ---------- "+h);
    System.out.println(" ---------- "+w); */
    import javax.swing.*;
    import java.awt.*;
    public class StaticReservation extends JPanel
    JLabel lbca,lbcb,lbcc,lbcd,lsc,lst,lwr;
    JTextField tbca,tbcb,tbcc,tbcd,tsc,tst,twr;
    GridBagLayout gbl;
    GridBagConstraints gbc;
    JPanel jpbc,jpsc,jpwr,jpbutton;
    JButton b1,b2,b3;
    StaticReservation()
         setLayout(new GridLayout(4,1));
    gbl=new GridBagLayout();      
         gbc=new GridBagConstraints();
         jpbc=new JPanel(gbl);
         jpbc.setBorder(BorderFactory.createTitledBorder("Backword Cast"));
         jpbc.setBounds(200,200,500,500);
         gbc.insets=new Insets(1,1,1,1);
    gbc.weightx=0.01;
         gbc.weighty=0.01;
    //Lable's & Textfiled'sfor BC
         gbc.gridx=0;
         gbc.gridy=0;
         lbca=new JLabel(" BC - A ");
         gbl.setConstraints(lbca,gbc);
         jpbc.add(lbca);
         gbc.gridx=0;
         gbc.gridy=1;
         lbcb=new JLabel(" BC - B ");
         gbl.setConstraints(lbcb,gbc);
         jpbc.add(lbcb);
         gbc.gridx=0;
         gbc.gridy=2;
         lbcc=new JLabel(" BC - C ");
         gbl.setConstraints(lbcc,gbc);
         jpbc.add(lbcc);
         gbc.gridx=0;
         gbc.gridy=3;
         lbcd=new JLabel(" BC - D ");
         gbl.setConstraints(lbcd,gbc);
         jpbc.add(lbcd);
    gbc.gridx=1;
         gbc.gridy=0;
         gbc.anchor=GridBagConstraints.WEST;
    tbca=new JTextField(15);
         gbl.setConstraints(tbca,gbc);
         jpbc.add(tbca);
         gbc.gridx=1;
         gbc.gridy=1;
         gbc.anchor=GridBagConstraints.WEST;
    tbcb=new JTextField(15);
         gbl.setConstraints(tbcb,gbc);
         jpbc.add(tbcb);
         gbc.gridx=1;
         gbc.gridy=2;
         gbc.anchor=GridBagConstraints.WEST;
    tbcc=new JTextField(15);
         gbl.setConstraints(tbcc,gbc);
         jpbc.add(tbcc);
         gbc.gridx=1;
         gbc.gridy=3;
         gbc.anchor=GridBagConstraints.WEST;
    tbcd=new JTextField(15);
         gbl.setConstraints(tbcd,gbc);
         jpbc.add(tbcd);
    //Lable's & Textfiled'sfor SC
         jpsc=new JPanel(gbl);
         jpsc.setBorder(BorderFactory.createTitledBorder(" SC/ST "));
         gbc.insets=new Insets(1,1,1,1);
    gbc.weightx=0.01;
         gbc.weighty=0.01;
         gbc.gridx=0;
         gbc.gridy=0;
         lsc=new JLabel(" SC ");
         gbl.setConstraints(lsc,gbc);
         jpsc.add(lsc);
         gbc.gridx=0;
         gbc.gridy=1;
         lst=new JLabel(" ST ");
         gbl.setConstraints(lst,gbc);
         jpsc.add(lst);     
    gbc.gridx=1;
         gbc.gridy=0;
         gbc.anchor=GridBagConstraints.WEST;
    tsc=new JTextField(15);
         gbl.setConstraints(tsc,gbc);
         jpsc.add(tsc);
         gbc.gridx=1;
         gbc.gridy=1;
         gbc.anchor=GridBagConstraints.WEST;
    tst=new JTextField(15);
         gbl.setConstraints(tst,gbc);
         jpsc.add(tst);
    //Lable's & Textfiled'sfor WR Or Ladies REservations
         jpwr=new JPanel(gbl);
         jpwr.setBorder(BorderFactory.createTitledBorder(" Women "));
         gbc.insets=new Insets(1,1,1,1);
    gbc.weightx=0.01;
         gbc.weighty=0.01;
         gbc.gridx=0;
         gbc.gridy=0;
         lwr=new JLabel(" Women/Ladies ");
         gbl.setConstraints(lwr,gbc);
         jpwr.add(lwr);
         gbc.gridx=1;
         gbc.gridy=0;
         gbc.anchor=GridBagConstraints.WEST;
    twr=new JTextField(15);
         gbl.setConstraints(twr,gbc);
         jpwr.add(tsc);
    jpbutton = new JPanel(new GridLayout(1,3));
         b1=new JButton("Submit");
         b1.setBounds(10,10,25,25);
         b2=new JButton("Change");
         b3=new JButton("Cancel");
         jpbutton.add(b1);
         jpbutton.add(b2);
         jpbutton.add(b3);
    // add all Panels to Main Panel
         add(jpbc);
         add(jpsc);
         add(jpwr);
         add(jpbutton);
    }

    depends on how you want them to appear.
    here's one way to change the current 'large' buttons
    JPanel p = new JPanel(new BorderLayout());//<---
    jpbutton = new JPanel(new GridLayout(1,3));
    b1=new JButton("Submit");
    b1.setBounds(10,10,25,25);
    b2=new JButton("Change");
    b3=new JButton("Cancel");
    jpbutton.add(b1);
    jpbutton.add(b2);
    jpbutton.add(b3);
    p.add(jpbutton,BorderLayout.SOUTH);//<---
    // add all Panels to Main Panel
    add(jpbc);
    add(jpsc);
    add(jpwr);
    //add(jpbutton);//<---
    add(p);//<---

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