JTable's suitable Layout manager

Question

i have a JTable in a JPanel and another JPanel with JLabels and JTextFiled in it.
* VersionControl.java
* @author JPQuilala
* Created on December 22, 2006, 1:18 PM
package qis_dreamteam;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyVetoException;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class VersionControl extends JInternalFrame {
JPanel pnlMain;
JPanel pnlApp,pnlAppTblInput,pnlAppTbl,pnlAppInput,pnlAppLbl,pnlAppTxt;
JPanel pnlHst,pnlHstTblInput,pnlHstTbl,pnlHstInput,pnlHstLbl,pnlHstTxt;
JTable tblApp;
JTable tblHst;
JTextField[] txtApp=new JTextField[7];
JTextField[] txtHst=new JTextField[7];
JLabel[] lblApp=new JLabel[7];
JLabel[] lblHst=new JLabel[7];
JButton btnAppAdd,bntAppUpdate,btnAppDelete;
JButton btnHstAdd,bntHstUpdate,btnHstDelete;
PaoTableModel modelApp=new PaoTableModel("SELECT * FROM QIS_APPLICATION_MT");
PaoTableModel modelHst=new PaoTableModel("SELECT * FROM QIS_APP_VERSION_HISTORY");
public VersionControl(Dimension dSize) throws PropertyVetoException {     
super("Version Control ",
false, //resizable
true, //closable
false, //maximizable
true); //iconifiable
pnlMain=new JPanel();
pnlApp=new JPanel();
pnlAppTblInput=new JPanel();
pnlAppTbl=new JPanel();
pnlAppInput=new JPanel();
pnlAppLbl=new JPanel();
pnlAppTxt=new JPanel();
pnlHst=new JPanel();
pnlHstTblInput=new JPanel();
pnlHstTbl=new JPanel();
pnlHstInput=new JPanel();
pnlHstLbl=new JPanel();
pnlHstTxt=new JPanel();
JPanel pnlHeader=new JPanel();
tblApp=new JTable(modelApp);
tblHst=new JTable(modelHst);
JScrollPane scrollApp=new JScrollPane(tblApp);
tblApp.setPreferredScrollableViewportSize(new Dimension(1000,100));
JScrollPane scrollHst=new JScrollPane(tblHst);
tblHst.setPreferredScrollableViewportSize(new Dimension(dSize.width,100));
setContentPane(pnlMain);
setSelected(true);
tblApp.setAutoResizeMode(tblApp.AUTO_RESIZE_LAST_COLUMN);
JLabel lblTitle=
new JLabel("Hitachi Global Storage Technology Philippines Corp.");
pnlHeader.setLayout(new FlowLayout());
lblTitle.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
lblTitle.setPreferredSize(new java.awt.Dimension (1100,25));
lblTitle.setForeground(new java.awt.Color(255, 255, 255));
lblTitle.setBackground(new java.awt.Color(215, 0, 0));
lblTitle.setOpaque(true);
pnlHeader.add(lblTitle);
//pnlAppLbl
pnlAppLbl.setLayout(new GridLayout(7,1,0,9));
for(int i=0;i<7;i++) {
pnlAppLbl.add(lblApp=new JLabel("Label "+i));
//pnlAppTxt
pnlAppTxt.setLayout(new GridLayout(7,1,0,5));
for(int i=0;i<7;i++) {
pnlAppTxt.add(txtApp[i]=new JTextField("",16));
//pnlAppInput
pnlAppInput.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("Input :"),
BorderFactory.createEmptyBorder(5,5,5,5)));
pnlAppInput.setLayout(new FlowLayout(FlowLayout.LEFT));
pnlAppInput.add(pnlAppLbl);
pnlAppInput.add(pnlAppTxt);
//pnlAppInput.setVisible(false);
//pnlAppTbl
pnlAppTbl.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("Tbl :"),
BorderFactory.createEmptyBorder(5,5,5,5)));
//pnlAppTbl.setLayout(new BoxLayout(pnlAppTbl,BoxLayout.LINE_AXIS));
//pnlAppTbl.setLayout(new GridLayout(1,0));
pnlAppTbl.setLayout(new BorderLayout());
pnlAppTbl.add(scrollApp);
//pnlAppTblInput
pnlAppTblInput.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("TblInput :"),
BorderFactory.createEmptyBorder(5,5,5,5)));
pnlAppTblInput.setLayout(new FlowLayout(FlowLayout.LEFT));
pnlAppTblInput.add(pnlAppTbl);
pnlAppTblInput.add(pnlAppInput);
//pnlApp
pnlApp.setLayout(new FlowLayout(FlowLayout.LEFT));
pnlApp.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("Application :"),
BorderFactory.createEmptyBorder(5,5,5,5)));
//pnlApp.add(pnlAppTbl);
pnlApp.add(pnlAppTblInput);
//pnlHst
pnlHst.setLayout(new FlowLayout(FlowLayout.LEFT));
pnlHst.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("History :"),
BorderFactory.createEmptyBorder(5,5,5,5)));
pnlHst.add(scrollHst);
//pnlMain
pnlMain.setLayout(new BoxLayout(pnlMain,BoxLayout.PAGE_AXIS));
pnlMain.setBorder(BorderFactory.createCompoundBorder(
null,
BorderFactory.createEmptyBorder(5,5,5,5)));
pnlMain.add(pnlHeader);
pnlMain.add(pnlApp);
pnlMain.add(pnlHst);
setSize(1015,712);
* PaoTableModel.java
* Created on December 15, 2006, 7:53 AM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package qis_dreamteam;
import java.text.Format;
import javax.swing.*;
import java.net.URL;
import java.util.Date;
import java.util.Vector;
import java.util.Timer;
import java.util.TimerTask;
import java.io.*;
import java.sql.*;
import java.lang.*;
import java.text.*;
import java.util.*;
import javax.swing.table.AbstractTableModel;
* @author JPQuilala
public class PaoTableModel extends AbstractTableModel {
Vector vData;
int colCount;
String[] headers;
String sSQL;
public PaoTableModel(String sSQL) {
DbManager oDB=new DbManager();
oDB.conQAPROD();
ResultSet oRS=oDB.execQuery(sSQL);
vData = new Vector();
try {
ResultSetMetaData metaData=oRS.getMetaData();
colCount = metaData.getColumnCount();
headers = new String[colCount];
for (int i = 1; i <= colCount; i++) {
headers[i - 1] = metaData.getColumnName(i);
while (oRS.next()) {
String[] sRecord = new String[colCount];
for (int i = 0; i < colCount; i++) {
sRecord[i] = oRS.getString(i + 1);
vData.addElement(sRecord);
} catch (SQLException ex) {
vData = new Vector();
ex.printStackTrace();
} finally {
oDB.disconnect();
public String getColumnName(int i) {
return headers[i];
public int getColumnCount() {
return colCount;
public int getRowCount() {
return vData.size();
public Object getValueAt(int row, int col) {
return ((String[]) vData.elementAt(row))[col];
this is the exact code... my problem is how can i set the JTable's size to be dependent on the JFrame and it should automaticaly adjust size when i inserted another JPanel.

Answer 1

Sorry, but I didn't read all the code... but if I could understand, the layout managers that you used adjust automatically with the window size. Another thing, it's not the table that you have to adjust. As the tables are in a jscrollpane, it's the size of the scrollpane that you have to adjust.
If you wan't a tip, try to use background color to visualize the size of your components. Sometimes, the table or another component is already adjusted, but the text or other components in it, it's not.