JSplitPane within JTabbedPane display problem

Question

What am I missing??? I have a JSplitPane in a TabbedPane.
The topComponent contains a JComboBox with Key values, the
Bottom Component will display details based on the key
value passed from the TopComponent. The bottomComponent
has 2 constructors: one default and one accepting an Argument.
The default constructor instantiate the class that would
represent the data and formats the bottomComponent. The second
constructor retrieves the data from an Oracle database
and formats the BottomComponent using the same method.
I put System.out messages in the formatting method and the
values are showing using the Second constructor.
The problem is displaying the detail data after the Key is
selected and passed from the Top Component. The Page is
initially displayed with the BottomComponent without any
values displayed. After the Key is selected from the
topComponent, the value is passed to the bottomComponent
(which is a Class). I access the data, issue setText(...)
on the fields BUT the screen display does not reflex the
values. I issue a System.out.print for the fields and
there's data there.
I don't understand why the page doesn't display the data.
Your help is greatly appreciated

Answer 1

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class Management extends JPanel implements ChangeListener{
//private JFrame dlframe;
private JTabbedPane propPane;
public Management(){
propPane = new JTabbedPane(SwingConstants.TOP);
propPane.setSize(795, 550);
propPane.addChangeListener(this);
populateTabbedPane();
// getContentPane().add(propPane);
add(propPane);
} // end of constructor
// create tabs with titles
private void populateTabbedPane(){
     propPane.addTab("Management", null, new Mgmt(), "Management");
     propPane.addTab("Management Contact", null,
new Management_Contact(), "Management Contact");
} // end of populateTabbedPane
public void stateChanged(ChangeEvent e){
     System.out.println("\n\n ****** Management.java " + propPane.getSelectedIndex() + " " + propPane.getTabPlacement());
public static void main(String[] args){
Home dl = new Home();
dl.pack();
dl.setSize(800, 620);
dl.setBackground(Color.white);
dl.setVisible(true);
} // end of class
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class Management_Contact extends JPanel {
     Mgmt_Class mgmt = null;
     Mgmt_Contact mgmtContact = null;
     public Management_Contact() {
          JSplitPane split = new JSplitPane();
          split.setOrientation(JSplitPane.VERTICAL_SPLIT);
          Mgmt_Header hdr = new Mgmt_Header();
          split.setTopComponent(hdr);
          Mgmt_Contact mgmtContact = new Mgmt_Contact();
          JScrollPane scrollPane = new JScrollPane(mgmtContact,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
          JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
          scrollPane.setPreferredSize(new Dimension(650,300));
          split.setBottomComponent(scrollPane);
          add(split);
} // end of Management class
import java.util.Vector;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Mgmt_Header extends JPanel implements ActionListener{
private JComboBox cmbMgmt;
private JTextField txtMgmtCode;
private JTextField txtMgmtAddr1;
private JTextField txtMgmtAddr2;
private JTextField txtMgmtCity;
private JButton sel;
private JLabel lblBlk;
private JPanel pWork;
private Box vertBox;     
private Box topBox;     
private Box midBox;     
private Box botBox;     
JToolTip toolTip = null;
private Mgmt_Class mClass = null;
private Mgmt_Contact cnt = null;
Vector mgmtVct = null;
public Mgmt_Header(){
     vertBox = Box.createVerticalBox();
     topBox = Box.createHorizontalBox();
     midBox = Box.createHorizontalBox();
     botBox = Box.createHorizontalBox();
mClass = new Mgmt_Class();
mgmtVct = new Vector();
     cmbMgmt = new JComboBox();
     cmbMgmt.addItem(" ");
     mgmtVct = mClass.bldMgmtHeader();
     for (int x1=0; x1<mgmtVct.size() ;x1++ )
          mClass = (Mgmt_Class)mgmtVct.get(x1);
          cmbMgmt.addItem(mClass.getManagementName());
System.out.println("MgmtHeader " + mgmtVct.size() + " " + cmbMgmt.getItemCount());
     cmbMgmt.setEditable(false);
     cmbMgmt.setBackground(Color.white);
     cmbMgmt.setName("cmbMgmt");
     cmbMgmt.setPreferredSize(new Dimension(250,27));
     cmbMgmt.setFont(new Font("Times-Roman",Font.PLAIN,12));
     cmbMgmt.addActionListener(this);
     pWork = new JPanel();
     pWork.setLayout(new FlowLayout(FlowLayout.CENTER));
     pWork.setBorder(BorderFactory.createTitledBorder(" Select Management Name "));
     pWork.add(new JLabel("Name: "));
     pWork.add(cmbMgmt);
     topBox.add(pWork);
     txtMgmtAddr1 = new JTextField("Address line 1",15);
     txtMgmtAddr1.setEditable(false);
     txtMgmtAddr2 = new JTextField("Address line 2",15);
     txtMgmtAddr2.setEditable(false);
     txtMgmtCity = new JTextField("City",15);
     txtMgmtCity.setEditable(false);
     midBox.add(midBox.createVerticalStrut(10));
     botBox.add(new JLabel("Address:"));
     botBox.add(topBox.createHorizontalStrut(15));
     botBox.add(txtMgmtAddr1);
     botBox.add(topBox.createHorizontalStrut(15));
     botBox.add(txtMgmtAddr2);
     botBox.add(topBox.createHorizontalStrut(15));
     botBox.add(txtMgmtCity);
     vertBox.add(topBox);
     vertBox.add(midBox);
     vertBox.add(botBox);
     add(vertBox);
} // end of constructor
public void actionPerformed(ActionEvent evt){
     if (evt.getSource() instanceof JComboBox){
     if (((JComboBox)evt.getSource()).getName() == "cmbMgmt"){
     int sel = ((JComboBox)evt.getSource()).getSelectedIndex();
System.out.println("ActionListener " + sel + " " + ((JComboBox)evt.getSource()).getItemAt(sel) + " " + cmbMgmt.getItemAt(sel));
     Mgmt_Class mClass = (Mgmt_Class)mgmtVct.get(sel - 1);
System.out.println("From Vector " + mClass.getAddress1() + " " + mClass.getAddress2() + " " + mClass.getManagementCode());
     txtMgmtAddr1.setText(mClass.getAddress1());
     txtMgmtAddr2.setText(mClass.getAddress2());
     txtMgmtCity.setText(City.getCityName(mClass.getCityCode()));
System.out.println("\n\nListener " + ((JComboBox)evt.getSource()).getSelectedItem() + " " + (((JComboBox)evt.getSource()).getSelectedIndex()) );
     int mCode = mClass.getManagementCode();
     cnt = new Mgmt_Contact(mCode);
System.out.println("\n After new Mgmt_Contact constructor");
          } // end of JComboBox
     } // end of actionPerformed
} // end of Mgmt_Header
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import java.io.*;
public class Mgmt_Contact extends JPanel implements KeyListener{
     private Mgmt_Contact_Class contact = null;
     private DefaultFocusManager mgr = null;
     private JTextField txtFName = null;
     private JTextField txtLName = null;
     private JTextField txtAddr1 = null;
     private JTextField txtAddr2 = null;
     private JButton btnUpd = null;
     private JButton btnNew = null;
     private JButton btnDel = null;
     private JButton btnNext = null;
     private JButton btnPrior = null;
     private JButton btnSel = null;
     private JPanel cntct = null;
     private JPanel pWork = null;
     private JPanel pWest = null;
     private JPanel pEast = null;
     private JPanel pNorth = null;
     private JPanel pSouth = null;
     private JPanel pCenter = null;
public Mgmt_Contact() {
     System.out.println("\n MgmtContact default constructor");
          contact = new Mgmt_Contact_Class();
          bldPage();
     System.out.println("\n ******* After bldPage() routine");
     public Mgmt_Contact(int mCode) {
System.out.println("\n MgmtContact second constructor " + mCode);
     Vector mgmtVct = new Vector();
     contact = new Mgmt_Contact_Class();
     mgmtVct = contact.bldMgmtContactTbl(mCode);
     contact =(Mgmt_Contact_Class)mgmtVct.get(0);
System.out.println("\n ******* Management Contact Table *** " + contact.getFirstName());          
     bldPage();
System.out.println("\n ******* After bldPage() routine");
     public void bldPage(){
System.out.println("\n MgmtContact bldPage ");
          cntct = new JPanel();
          cntct.setLayout(new BorderLayout());
          pWest = new JPanel();
          pWest.setLayout(new GridLayout(0,1));
          pCenter = new JPanel();
          pCenter.setLayout(new GridLayout(0,1));
          pNorth = new JPanel();
          pNorth.setLayout(new FlowLayout(FlowLayout.CENTER));
          pSouth = new JPanel();
          pSouth.setLayout(new FlowLayout());
          pWork = new JPanel();
          pWork.setLayout(new FlowLayout(FlowLayout.LEFT));
          pWest.add(new JLabel("First :"));
          txtFName = new JTextField(15);
          txtFName.setText(contact.getFirstName());
System.out.println("\n First Name " + txtFName.getText() + " " + contact.getFirstName());
          txtFName.setPreferredSize(new Dimension(200,27));
          txtFName.addKeyListener(this);
          txtFName.setName("txtFName");
          pWork.add(txtFName);
          pWork.add(new JLabel("Last :"));
          txtLName = new JTextField(15);
          txtLName.setText(contact.getLastName());
          txtLName.setPreferredSize(new Dimension(200,27));
          txtLName.setName("txtLName");     
          txtLName.addKeyListener(this);
          pWork.add(txtLName);
          pCenter.add(pWork);
          pWork = new JPanel();
          pWork.setLayout(new FlowLayout(FlowLayout.LEFT));
          pWest.add(new JLabel("Address :"));
          txtAddr1 = new JTextField(15);
          txtAddr1.setText(contact.getAddress1());
          txtAddr1.setPreferredSize(new Dimension(200,27));
          txtAddr1.addKeyListener(this);
          txtAddr1.setName("txtAddr1");
          pWork.add(txtAddr1);
          pWork.add(new JLabel(" "));
          txtAddr2 = new JTextField(15);
          txtAddr2.setText(contact.getAddress2());
          txtAddr2.setPreferredSize(new Dimension(200,27));
          txtAddr2.setName("txtAddr2");
          txtAddr2.addKeyListener(this);
          pWork.add(txtAddr2);
          pCenter.add(pWork);
          pWork = new JPanel();
          pWork.setLayout(new FlowLayout(FlowLayout.LEFT));
          btnUpd = new JButton("Update");
          btnUpd.addActionListener(new ButtonListener());
          btnDel = new JButton("Delete");
          btnDel.addActionListener(new ButtonListener());
          btnNew = new JButton(" Add ");
          btnNew.addActionListener(new ButtonListener());
          btnNext = new JButton(" Next ");
          btnNext.addActionListener(new ButtonListener());
          btnPrior = new JButton(" Prior ");
          btnPrior.addActionListener(new ButtonListener());
          btnSel = new JButton(" Select ");
          btnSel.addActionListener(new ButtonListener());
          pSouth.add(btnNew);
          pSouth.add(btnUpd);
          pSouth.add(btnDel);
          pSouth.add(btnNext);
          pSouth.add(btnPrior);
          pSouth.add(btnSel);
          cntct.add("West", pWest);
          cntct.add("Center", pCenter);
          cntct.add("South", pSouth);
          add(cntct);
     class ButtonListener implements ActionListener{
     public void actionPerformed(ActionEvent e){
          System.out.println("ButtonListener " + e.getActionCommand() + " " +
          contact.getString());
// KeyListener Interface
     public void keyPressed(KeyEvent e){
     public void keyReleased(KeyEvent e){
          mgr = new DefaultFocusManager();
          Component comp = e.getComponent();
          Object obj = ((JTextField)e.getSource());
          if ((ColUtils.isMaxField(obj))){
          mgr.focusNextComponent(comp);
     } // end of KeyReleased
     public void keyTyped(KeyEvent e){
          char num = e.getKeyChar();
          Object obj = ((JTextField)e.getSource());
          if (ColUtils.isDataValid(num, obj)){
          else {
          e.consume();
          System.out.println(num + " Rejected Data");
     } // end of keyTyped
} // end of Mgmt_Contact class