Serialization and the JTable
Hello!
I'm having some trouble to serialize my JTable.. The first time I click the SaveAs button, it save without problems, but the second time I click the SaveAs, even saving with another name, it throws the exception:
java.io.NotSerializableException: com.sun.java.swing.plaf.windows.WindowsTableHeaderUI
This problem do not occur in other computers, only on mine. I tryed to update my JKD and JRE from 1.5 to 1.6 update4, but still don't work..
(I'm using Windows XP Professional, and Eclipse 3.3)
Any idea??
Hello,
i tried serializing my Jtable data with the DefaultTableModel method but i get a class cast exception saying JTable cannot be cast to Table model..
Is the a JTable model function?
or what should i do?
Similar Messages
-
Java.io.NotSerializableException when overwrite the JTable data into .txt file
hi everyone
this is my first time to get help from sun forums
i had java.io.NotSerializableException: java.lang.reflect.Constructor error when overwrite the JTable data into .txt file.
At the beginning, the code will be generate successfully and the jtable will be showing out with the data that been save in the studio1.txt previously,
but after i edit the data at the JTable, and when i trying to click the save button, the error had been showing out and i cannot succeed to save the JTable with the latest data.
After this error, the code can't be run again and i had to copy the studio1.txt again to let the code run 1 more time.
I hope i can get any solution at here and this will be very useful for me.
the following is my code...some of it i create it with the GUI netbean
but i dunno how to attach my .txt file with this forum
did anyone need the .txt file?
this is the code that suspect maybe some error here
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String filename = "studio1.txt";
try {
FileOutputStream fos = new FileOutputStream(new File(filename));
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(jTable2);
oos.close();
catch(IOException e) {
System.out.println("Problem creating table file: " + e);
return;
System.out.println("JTable correctly saved to file " + filename);
}the full code will be at the next msgthis is the part 1 of the code
this is the full code...i had /*....*/ some of it to make it easier for reading
package gui;
import javax.swing.*;
import java.io.*;
public class timetables extends javax.swing.JFrame {
public timetables() {
initComponents();
@SuppressWarnings("unchecked")
private void initComponents() {
jDialog1 = new javax.swing.JDialog();
buttonGroup1 = new javax.swing.ButtonGroup();
buttonGroup2 = new javax.swing.ButtonGroup();
buttonGroup3 = new javax.swing.ButtonGroup();
buttonGroup4 = new javax.swing.ButtonGroup();
jTextField1 = new javax.swing.JTextField();
jLayeredPane1 = new javax.swing.JLayeredPane();
jLabel6 = new javax.swing.JLabel();
jTabbedPane1 = new javax.swing.JTabbedPane();
jScrollPane3 = new javax.swing.JScrollPane();
jTable2 = new javax.swing.JTable();
jScrollPane4 = new javax.swing.JScrollPane();
jTable3 = new javax.swing.JTable();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
/* org.jdesktop.layout.GroupLayout jDialog1Layout = new org.jdesktop.layout.GroupLayout(jDialog1.getContentPane());
jDialog1.getContentPane().setLayout(jDialog1Layout);
jDialog1Layout.setHorizontalGroup(
jDialog1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 400, Short.MAX_VALUE)
jDialog1Layout.setVerticalGroup(
jDialog1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 300, Short.MAX_VALUE)
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLayeredPane1.add(jLabel6, javax.swing.JLayeredPane.DEFAULT_LAYER);
String filename1 = "studio1.txt";
try {
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(filename1));
jTable2 = (JTable) ois.readObject();
System.out.println("reading for " + filename1);
catch(Exception e) {
System.out.println("Problem reading back table from file: " + filename1);
return;
try {
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(filename1));
jTable3 = (JTable) ois.readObject();
System.out.println("reading for " + filename1);
catch(Exception e) {
System.out.println("Problem reading back table from file: " + filename1);
return;
jTable2.setRowHeight(20);
jTable3.setRowHeight(20);
jScrollPane3.setViewportView(jTable2);
jScrollPane4.setViewportView(jTable3);
jTable2.getColumnModel().getColumn(4).setResizable(false);
jTable3.getColumnModel().getColumn(4).setResizable(false);
jTabbedPane1.addTab("STUDIO 1", jScrollPane3);
jTabbedPane1.addTab("STUDIO 2", jScrollPane4);
jTextField1.setText("again n again");
jLabel6.setText("jLabel5");
jLabel6.setBounds(0, 0, -1, -1);
jButton2.setText("jButton2");
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
-
Java.io.NotSerializableException when overwrite the JTable data into .txt
hi everyone
i had java.io.NotSerializableException: java.lang.reflect.Constructor error when overwrite the JTable data into .txt file.
At the beginning, the code will be generate successfully and the jtable
will be showing out with the data that been save in the studio1.txt
previously,
but after i edit the data at the JTable, and when i trying to click the
save button, the error had been showing out and i cannot succeed to
save the JTable with the latest data.
After this error, the code can't be run again and i had to copy the studio1.txt again to let the code run 1 more time.
I hope i can get any solution at here and this will be very useful for me.
but i dunno how to attach my .txt file with this forum
did anyone need the .txt file?
the following is my suspect code
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String filename1 = "studio1.txt";
try {
FileOutputStream fos = new FileOutputStream(new File(filename1));
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(jTable2.getModel());
oos.flush();
oos.close();
fos.close();
catch(IOException e) {
System.out.println("Problem creating table file: " + e);
e.printStackTrace();
return;
System.out.println("JTable correctly saved to file " + filename1);
}this is the reading code
String filename1="studio1.txt";
try {
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(filename1));
TableModel model = (TableModel)ois.readObject();
jTable3.setModel(model);
System.out.println("reading for " + filename1);
catch(Exception e) {
System.out.println("Problem reading back table from file: " + filename1);
return;
}Edited by: Taufulou on Jan 8, 2009 11:43 PM
Edited by: Taufulou on Jan 8, 2009 11:44 PM
Edited by: Taufulou on Jan 8, 2009 11:45 PMis this the code u mean?
i had put this code inside it but the problem still remain the same
if (jTable2.isEditing()) {
jTable2.getCellEditor().stopCellEditing();
}i had found a new thing that when i just double click the cell without change any data inside the table
and click the button "Save". the same exception which is
java.io.NotSerializableException: java.lang.reflect.Constructor
will come out again. -
How to outline selected cells during drag and drop in the jtable
Hi,
I have spent a lot of time to find out how to outline selected cells during drag in the jtable, but I did not find the answer.
Can anybody give me a tip, where to read more about this problem or even better, give an example...
I have the following situation:
1.Table has 10 rows and 10 columns
2.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION) and setCellSelectionEnabled(true)
3.user select 5 cells in 4th row (for example cell45,cell46,cell47,cell48 and cell49)
4.user starts dragging. During dragging an outline should be drawn. Outline should be a rectangular with width of 5 cells and height of one cell. Outline should move according to the mouse position.
5.rectangular disappears when dropped
Regards,
PrimozIn "createTransferable" you can create a drag image
which you can paint in "dragOver" and clear in "drop" method of DropTarget :
package dnd;
* DragDropJTableCellContents.java
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
public class DragDropJTableCellContents extends JFrame {
public DragDropJTableCellContents() {
setTitle("Drag and Drop JTable");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
getContentPane().add(createTable("JTable"), BorderLayout.CENTER);
setSize(400, 300);
setLocationRelativeTo(null);
private JPanel createTable(String tableId) {
DefaultTableModel model = new DefaultTableModel();
for (int i = 0; i < 10; i++) {
model.addColumn("Column "+i);
for (int i = 0; i < 10; i++) {
String[] rowData = new String[10];
for (int j = 0; j < 10; j++) {
rowData[j] = tableId + " " + i + j;
model.addRow(rowData);
JTable table = new JTable(model);
table.getTableHeader().setReorderingAllowed(false);
table.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
table.setCellSelectionEnabled(true);
JScrollPane scrollPane = new JScrollPane(table);
table.setDragEnabled(true);
TableTransferHandler th = new TableTransferHandler();
table.setTransferHandler(th);
table.setDropTarget(new TableDropTarget(th));
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
JPanel panel = new JPanel(new BorderLayout());
panel.add(scrollPane);
panel.setBorder(BorderFactory.createTitledBorder(tableId));
return panel;
public static void main(String[] args) {
new DragDropJTableCellContents().setVisible(true);
abstract class StringTransferHandler extends TransferHandler {
public int dropAction;
protected abstract String exportString(JComponent c);
protected abstract void importString(JComponent c, String str);
@Override
protected Transferable createTransferable(JComponent c) {
return new StringSelection(exportString(c));
@Override
public int getSourceActions(JComponent c) {
return COPY;
@Override
public boolean importData(JComponent c, Transferable t) {
if (canImport(c, t.getTransferDataFlavors())) {
try {
String str = (String) t.getTransferData(DataFlavor.stringFlavor);
importString(c, str);
return true;
} catch (UnsupportedFlavorException ufe) {
} catch (IOException ioe) {
return false;
@Override
public boolean canImport(JComponent c, DataFlavor[] flavors) {
for (int ndx = 0; ndx < flavors.length; ndx++) {
if (DataFlavor.stringFlavor.equals(flavors[ndx])) {
return true;
return false;
class TableTransferHandler extends StringTransferHandler {
private int dragRow;
private int[] dragColumns;
private BufferedImage[] image;
private int row;
private int[] columns;
public JTable target;
@Override
protected Transferable createTransferable(JComponent c) {
JTable table = (JTable) c;
dragRow = table.getSelectedRow();
dragColumns = table.getSelectedColumns();
createDragImage(table);
return new StringSelection(exportString(c));
protected String exportString(JComponent c) {
JTable table = (JTable) c;
row = table.getSelectedRow();
columns = table.getSelectedColumns();
StringBuffer buff = new StringBuffer();
for (int j = 0; j < columns.length; j++) {
Object val = table.getValueAt(row, columns[j]);
buff.append(val == null ? "" : val.toString());
if (j != columns.length - 1) {
buff.append(",");
return buff.toString();
protected void importString(JComponent c, String str) {
target = (JTable) c;
DefaultTableModel model = (DefaultTableModel) target.getModel();
String[] values = str.split("\n");
int colCount = target.getSelectedColumn();
int max = target.getColumnCount();
for (int ndx = 0; ndx < values.length; ndx++) {
String[] data = values[ndx].split(",");
for (int i = 0; i < data.length; i++) {
String string = data;
if(colCount < max){
model.setValueAt(string, target.getSelectedRow(), colCount);
colCount++;
public BufferedImage[] getDragImage() {
return image;
private void createDragImage(JTable table) {
if (dragColumns != null) {
try {
image = new BufferedImage[dragColumns.length];
for (int i = 0; i < dragColumns.length; i++) {
Rectangle cellBounds = table.getCellRect(dragRow, i, true);
TableCellRenderer r = table.getCellRenderer(dragRow, i);
DefaultTableModel m = (DefaultTableModel) table.getModel();
JComponent lbl = (JComponent) r.getTableCellRendererComponent(table,
table.getValueAt(dragRow, dragColumns[i]), false, false, dragRow, i);
lbl.setBounds(cellBounds);
BufferedImage img = new BufferedImage(lbl.getWidth(), lbl.getHeight(),
BufferedImage.TYPE_INT_ARGB_PRE);
Graphics2D graphics = img.createGraphics();
graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1f));
lbl.setBorder(BorderFactory.createLineBorder(Color.LIGHT_GRAY));
lbl.paint(graphics);
graphics.dispose();
image[i] = img;
} catch (RuntimeException re) {
class TableDropTarget extends DropTarget {
private Insets autoscrollInsets = new Insets(20, 20, 20, 20);
private Rectangle rect2D = new Rectangle();
private TableTransferHandler handler;
public TableDropTarget(TableTransferHandler h) {
super();
this.handler = h;
@Override
public void dragOver(DropTargetDragEvent dtde) {
handler.dropAction = dtde.getDropAction();
JTable table = (JTable) dtde.getDropTargetContext().getComponent();
Point location = dtde.getLocation();
int row = table.rowAtPoint(location);
int column = table.columnAtPoint(location);
table.changeSelection(row, column, false, false);
paintImage(table, location);
autoscroll(table, location);
super.dragOver(dtde);
public void dragExit(DropTargetDragEvent dtde) {
clearImage((JTable) dtde.getDropTargetContext().getComponent());
super.dragExit(dtde);
@Override
public void drop(DropTargetDropEvent dtde) {
Transferable data = dtde.getTransferable();
JTable table = (JTable) dtde.getDropTargetContext().getComponent();
clearImage(table);
handler.importData(table, data);
super.drop(dtde);
private final void paintImage(JTable table, Point location) {
Point pt = new Point(location);
BufferedImage[] image = handler.getDragImage();
if (image != null) {
table.paintImmediately(rect2D.getBounds());
rect2D.setLocation(pt.x - 15, pt.y - 15);
int wRect2D = 0;
int hRect2D = 0;
for (int i = 0; i < image.length; i++) {
table.getGraphics().drawImage(image[i], pt.x - 15, pt.y - 15, table);
pt.x += image[i].getWidth();
if (hRect2D < image[i].getHeight()) {
hRect2D = image[i].getHeight();
wRect2D += image[i].getWidth();
rect2D.setSize(wRect2D, hRect2D);
private final void clearImage(JTable table) {
table.paintImmediately(rect2D.getBounds());
private Insets getAutoscrollInsets() {
return autoscrollInsets;
private void autoscroll(JTable table, Point cursorLocation) {
Insets insets = getAutoscrollInsets();
Rectangle outer = table.getVisibleRect();
Rectangle inner = new Rectangle(outer.x + insets.left,
outer.y + insets.top,
outer.width - (insets.left + insets.right),
outer.height - (insets.top + insets.bottom));
if (!inner.contains(cursorLocation)) {
Rectangle scrollRect = new Rectangle(cursorLocation.x - insets.left,
cursorLocation.y - insets.top,
insets.left + insets.right,
insets.top + insets.bottom);
table.scrollRectToVisible(scrollRect);
Edited by: Andre_Uhres on Nov 18, 2007 10:03 PM -
Revision: 22429
Revision: 22429
Author: [email protected]
Date: 2011-09-07 08:04:46 -0700 (Wed, 07 Sep 2011)
Log Message:
Adding the default fallback of serializer and deserializer classes to amf deserializer and amf serializer
Modified Paths:
blazeds/trunk/modules/core/src/flex/messaging/io/SerializationContext.java -
Add rows and sort JTable in the same program
I would like to have a button to add rows to the JTable, but would also like to sort the data within the columns. This program can sort the data prior to clicking the 'add row' button. After I click the button, there is no new row, and I lose the ability to sort the column. Do you have any tips or advice as to what I can do to fix my program? Is it because I have to have the final code for SortFilterModel to work?
Thanks
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TableRowColumn extends JFrame
private final static String LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
JTable table;
DefaultTableModel model;
JPanel buttonPanel;
JButton button;
public TableRowColumn()
Object[][] data = {
{"6", "K"},
{"5", "A"},
{"1", "Z"}
String[] columnNames = {
"Number",
"Letter"
model = new DefaultTableModel(data, columnNames);
//comment out this SortFilterModel line
final SortFilterModel sorter = new SortFilterModel(model);
//Change sorter to model
table = new JTable(sorter);
table.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
// Add table and a Button panel to the frame
JScrollPane scrollPane = new JScrollPane( table );
getContentPane().add( scrollPane );
buttonPanel = new JPanel();
getContentPane().add( buttonPanel, BorderLayout.SOUTH );
button = new JButton( "Add Row" );
buttonPanel.add( button );
button.addActionListener( new ActionListener()
public void actionPerformed(ActionEvent e)
model.addRow( createRow() );
int row = table.getRowCount() - 1;
table.changeSelection(row, row, false, false);
table.requestFocusInWindow();
//Set up double click handler for column headers and sort
table.getTableHeader().addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent event)
//check for click
if (event.getClickCount() < 2) return;
//find column of click and
int tableColumn = table.columnAtPoint(event.getPoint());
//translate to table model index and sort
int modelColumn = table.convertColumnIndexToModel(tableColumn);
sorter.sort(modelColumn);
private Object[] createRow()
Object[] newRow = new Object[2];
int row = table.getRowCount() + 1;
newRow[0] = Integer.toString( row );
newRow[1] = LETTERS.substring(row-1, row);
return newRow;
public static void main(String[] args)
TableRowColumn frame = new TableRowColumn();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setVisible(true);
}I attempted to modify the code in the correct way, but I ran into a problem near the bottom with the model.addRow(rowData); line. It has an error saying it can't find the addRow method. If I take away the model part, it will compile, but it will cause an infinite loop when I push the 'Add Row' button within the program. I didn't expect that to work, and I think it isn't calling the right model.
I am aware that my code organization and design skills are not very good. I am a fan of basic assembly and low-level hardware languages for the most part.
Thanks for your advice so far, it has been helpful.
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TableRowColumn extends JFrame
private final static String LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
JTable table;
public DefaultTableModel model;
JPanel buttonPanel;
JButton button;
public TableRowColumn()
Object[][] data = {
{"9", "C"},
{"5", "A"},
{"3", "B"}
String[] columnNames = {
"Number",
"Letter"
model = new DefaultTableModel(data, columnNames);
//comment out this SortFilterModel line
final SortFilterModel sorter = new SortFilterModel(model);
//Change sorter to model
table = new JTable(sorter);
table.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
// Add table and a Button panel to the frame
JScrollPane scrollPane = new JScrollPane( table );
getContentPane().add( scrollPane );
buttonPanel = new JPanel();
getContentPane().add( buttonPanel, BorderLayout.SOUTH );
button = new JButton( "Add Row" );
buttonPanel.add( button );
button.addActionListener( new ActionListener()
public void actionPerformed(ActionEvent e)
sorter.addRow( createRow() );
int row = table.getRowCount() - 1;
table.changeSelection(row, row, false, false);
table.requestFocusInWindow();
//Set up double click handler for column headers and sort
table.getTableHeader().addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent event)
//check for click
if (event.getClickCount() < 2) return;
//find column of click and
int tableColumn = table.columnAtPoint(event.getPoint());
//translate to table model index and sort
int modelColumn = table.convertColumnIndexToModel(tableColumn);
sorter.sort(modelColumn);
private Object[] createRow()
Object[] newRow = new Object[2];
int row = table.getRowCount() + 1;
newRow[0] = Integer.toString( row );
newRow[1] = LETTERS.substring(row-1, row);
return newRow;
public static void main(String[] args)
TableRowColumn frame = new TableRowColumn();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setVisible(true);
class SortFilterModel extends AbstractTableModel{
public SortFilterModel(TableModel m){
model = m;
rows = new Row[model.getRowCount()];
for (int i = 0; i < rows.length; i++) {
rows[i] = new Row();
rows.index = i;
public void sort(int c){
sortColumn = c;
Arrays.sort(rows);
fireTableDataChanged();
public Object getValueAt(int r, int c) {
return model.getValueAt(rows[r].index, c);
public boolean isCellEditable(int r, int c){
return model.isCellEditable(rows[r].index, c);
public void setValueAt(Object aValue, int r, int c){
model.setValueAt(aValue, rows[r].index, c);
public int getRowCount() {
return model.getRowCount();
public int getColumnCount(){
return model.getColumnCount();
public String getColumnName(int c) {
return model.getColumnName(c);
public Class getColumnClass(int c){
return model.getColumnClass(c);
private class Row implements Comparable {
public int index;
public int compareTo(Object other) {
Row otherRow = (Row)other;
Object a = model.getValueAt(index, sortColumn);
Object b = model.getValueAt(otherRow.index, sortColumn);
if (a instanceof Comparable) {
return ((Comparable)a).compareTo(b);
else{
return a.toString().compareTo(b.toString());
public void addRow(Object[] rowData) {
Row[] oldRows = new Row[rows.length];
for (int i=0; i<rows.length; i++) {
oldRows[i] = rows[i];
rows = new Row[rows.length +1];
for (int i=0; i < oldRows.length; i++) {
rows[i] = oldRows[i];
rows[oldRows.length] = new Row();
rows[oldRows.length].index = oldRows.length;
addRow (rowData);
//model.addRow(rowData);
fireTableDataChanged();
private TableModel model;
private int sortColumn;
private Row[] rows; -
Header and Selectedrow in the Jtable
Hello, I want some help please,
I have a JTable with a variable number of columns and rows. When a row is selected, all the data of this row are selected and I want to recupere the data in the column which header is "name". how can I do , is it possible to recupere data using the selected row and the header of the column.
thanks.If you want to select only a column :
jtable.setRowSelectionAllowed(false);
jtable.setColumnSelectionAllowed(true); -
Drag and Drop questions and Serialization in the 1Z0-852 Upgrade exam?
Hi,
Does anyone know if the drag and drop items and serialization have been removed from the 1Z0-852 Java SE 6 Programmer Certified Professional UPGRADE exam?
I know that they have been removed from the 1Z0-851, but not sure about the upgrade exam.
Thanks in advance,
AlvaroAlvaro wrote:
Hi,
Does anyone know if the drag and drop items and serialization have been removed from the 1Z0-852 Java SE 6 Programmer Certified Professional UPGRADE exam?
I know that they have been removed from the 1Z0-851, but not sure about the upgrade exam.
Thanks in advance,
Alvaro(1) Drag and Drop
.... this question format will have been removed:
Ref: http://blogs.oracle.com/certification/entry/0596
(2) Serialization:
It is best to compare the topics from your notes to the current topics, however according to my reading of the current topics it is in scope at least to some extent:
http://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=41&p_exam_id=1Z0_852 (Section 3 API Contents):
Develop code that serializes and/or de-serializes objects using the following APIs from java.io: DataInputStream, DataOutputStream, FileInputStream, FileOutputStream, ObjectInputStream, ObjectOutputStream and Serializable. -
Differences between the serializable and externizable
please give me
Recently i gathered information
serializable:
is the super interface for the externalizable.
during deserialization, it doesnot call the construtor.
it follows the stored bits retrieval concept.
this is the marker interface.
externalizable:
extends serializable.
uses the constructor during the deserialization
contains two methods:writeExternal(),readExternal()
Cheers
Kurakula Sudhakar Reddy(Sudha). -
Hi all,
I have a problem with printing JTable.
My application has a submit button,JTable and Print Button.
As I click on the Submit button, the data is retrieved from the Database(MS Access) and displayed on the JTable.
Now when I click on the Print button, the printer properties dialog box is displayed. But when I click on the print button in the dialog box, nothing is printed on the paper.
I checked the printers and faxes in the control panel, It showed Java printing under the Document name and Printing under the Status. It is displayed for sometime and then disappeared after some time. But nothing is printed on the paper(not even the blank paper).
I tried a lot but couldn't understand the problem.
I have used the following files:
PrintJTable.java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.print.*;
import java.awt.geom.*;
import java.awt.Dimension;
import java.applet.*;
import java.sql.*;
import java.util.*;
import java.net.*;
import java.lang.*;
import javax.swing.table.*;
import javax.swing.event.*;
import javax.swing.border.*;
class PrintJTable implements ActionListener,Printable
Connection connect;
ResultSet rs;
JTable table;
JScrollPane tableAggregate;
DisplayTable displayTable;
JButton print,submitButton;
public PrintJTable()
JFrame frame = new JFrame("Table");
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}});
connect();
displayTable= new DisplayTable();
JButton submitButton= new JButton("SUBMIT");
submitButton.addActionListener(this);
JButton printButton= new JButton("PRINT!");
// for faster printing turn double buffering off
RepaintManager.currentManager( frame).setDoubleBufferingEnabled(false);
printButton.addActionListener( new ActionListener(){
public void actionPerformed(ActionEvent evt) {
PrinterJob pj=PrinterJob.getPrinterJob();
pj.setPrintable(PrintJTable.this);
pj.printDialog();
try{
pj.print();
}catch (Exception PrintException) {}
tableAggregate = createTable();
tableAggregate.setBorder(new BevelBorder(BevelBorder.LOWERED));
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(submitButton,BorderLayout.NORTH);
frame.getContentPane().add(tableAggregate,BorderLayout.CENTER);
frame.getContentPane().add(printButton,BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
} // end of constructor
public void connect()
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
System.out.println("Opening db connection");
connect = DriverManager.getConnection("jdbc:odbc:Driver={MicroSoft Access Driver (*.mdb)};DBQ=C:/db1.mdb","","");
catch (ClassNotFoundException ex) {
System.err.println("Cannot find the database driver classes.");
System.err.println(ex);
catch (SQLException ex) {
System.err.println("Cannot connect to this database.");
System.err.println(ex);
public JScrollPane createTable() {
displayTable= new DisplayTable();
JTable table = new JTable(displayTable);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
table.getTableHeader().setReorderingAllowed(false);
JScrollPane scrollpane = new JScrollPane(table,
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
return scrollpane;
} // end of createTable()
public void actionPerformed(ActionEvent ie)
try
Statement statement6=connect.createStatement();
ResultSet rs6=statement6.executeQuery("select * from benf_details");
displayTable.executeQuery(rs6);
statement6.close();
catch(SQLException sqle)
JOptionPane.showMessageDialog(null,"error2"+sqle);
}// end of actionPerformed
public int print(Graphics g, PageFormat pageFormat, int pageIndex) throws PrinterException {
Graphics2D g2 = (Graphics2D)g;
g2.setColor(Color.black);
int fontHeight=g2.getFontMetrics().getHeight();
int fontDesent=g2.getFontMetrics().getDescent();
double pageHeight = pageFormat.getImageableHeight()-fontHeight; //leave room for page number
double pageWidth = pageFormat.getImageableWidth();
System.out.println("page width = " + pageWidth );
double tableWidth = (double) table.getColumnModel().getTotalColumnWidth();
System.out.println("table width = " + tableWidth );
double scale = 1;
if (tableWidth >= pageWidth) {
scale = pageWidth / tableWidth;
System.out.println("scale = " + scale );
double headerHeightOnPage = table.getTableHeader().getHeight() * scale;
double tableWidthOnPage = tableWidth * scale;
double oneRowHeight = (table.getRowHeight() + table.getRowMargin()) * scale;
int numRowsOnAPage = (int)((pageHeight - headerHeightOnPage) / oneRowHeight);
double pageHeightForTable = oneRowHeight * numRowsOnAPage;
int totalNumPages = (int)Math.ceil(((double)table.getRowCount())/numRowsOnAPage);
if(pageIndex >= totalNumPages) {
return NO_SUCH_PAGE;
g2.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
g2.drawString("Page: "+ (pageIndex + 1),(int)pageWidth / 2 - 35,
(int)( pageHeight + fontHeight - fontDesent ));//bottom center
g2.translate( 0f, headerHeightOnPage );
g2.translate( 0f, -pageIndex * pageHeightForTable );
//If this piece of the table is smaller than the size available,
//clip to the appropriate bounds.
if (pageIndex + 1 == totalNumPages) {
int lastRowPrinted = numRowsOnAPage * pageIndex;
int numRowsLeft = table.getRowCount() - lastRowPrinted;
g2.setClip(0, (int)(pageHeightForTable * pageIndex),
(int) Math.ceil(tableWidthOnPage),
(int) Math.ceil(oneRowHeight * numRowsLeft));
//else clip to the entire area available.
else{
g2.setClip(0, (int)(pageHeightForTable * pageIndex),
(int) Math.ceil(tableWidthOnPage),
(int) Math.ceil(pageHeightForTable));
g2.scale(scale,scale);
table.paint(g2);
g2.scale(1/scale,1/scale);
g2.translate( 0f, pageIndex * pageHeightForTable);
g2.translate( 0f, -headerHeightOnPage);
g2.setClip(0, 0,(int) Math.ceil(tableWidthOnPage), (int)Math.ceil(headerHeightOnPage));
g2.scale(scale,scale);
table.getTableHeader().paint(g2);//paint header at top
return Printable.PAGE_EXISTS;
} // end of print()
public static void main(String[] args) {
new PrintJTable();
}// end of PrintJTable
DisplayTable.java
import java.util.Vector;
import java.sql.*;
import javax.swing.*;
import javax.swing.table.AbstractTableModel;
import javax.swing.event.TableModelEvent;
public class DisplayTable extends AbstractTableModel {
Connection connection;
Statement statement;
ResultSet resultSet;
String[] columnNames = {};
Vector rows = new Vector();
ResultSetMetaData metaData;
String db_uname,db_passwd;
public DisplayTable() {
public void executeQuery(ResultSet resultSet) {
try {
metaData = resultSet.getMetaData();
int numberOfColumns = metaData.getColumnCount();
columnNames = new String[numberOfColumns];
// Get the column names and cache them.
// Then we can close the connection.
for(int column = 0; column < numberOfColumns; column++) {
columnNames[column] = metaData.getColumnLabel(column+1);
// Get all rows.
rows = new Vector();
while (resultSet.next()) {
Vector newRow = new Vector();
for (int i = 1; i <= getColumnCount(); i++) {
newRow.addElement(resultSet.getObject(i));
rows.addElement(newRow);
// close(); Need to copy the metaData, bug in jdbc:odbc driver.
fireTableChanged(null); // Tell the listeners a new table has arrived.
catch (SQLException ex) {
System.err.println(ex);
public void close() throws SQLException {
System.out.println("Closing db connection");
resultSet.close();
statement.close();
connection.close();
protected void finalize() throws Throwable {
close();
super.finalize();
// Implementation of the TableModel Interface
// MetaData
public String getColumnName(int column) {
if (columnNames[column] != null) {
return columnNames[column];
} else {
return "";
public Class getColumnClass(int column) {
int type;
try {
type = metaData.getColumnType(column+1);
catch (SQLException e) {
return super.getColumnClass(column);
switch(type) {
case Types.CHAR:
case Types.VARCHAR:
case Types.LONGVARCHAR:
return String.class;
case Types.BIT:
return Boolean.class;
case Types.TINYINT:
case Types.SMALLINT:
case Types.INTEGER:
return Integer.class;
case Types.BIGINT:
return Long.class;
case Types.FLOAT:
case Types.DOUBLE:
return Double.class;
case Types.DATE:
return java.sql.Date.class;
default:
return Object.class;
// to make the cells editable
public boolean isCellEditable(int row, int column) {
try {
return metaData.isWritable(column+1);
catch (SQLException e) {
return false;
public int getColumnCount() {
return columnNames.length;
// Data methods
public int getRowCount() {
return rows.size();
public Object getValueAt(int aRow, int aColumn) {
Vector row = (Vector)rows.elementAt(aRow);
return row.elementAt(aColumn);
public String dbRepresentation(int column, Object value) {
int type;
if (value == null) {
return "null";
try {
type = metaData.getColumnType(column+1);
catch (SQLException e) {
return value.toString();
switch(type) {
case Types.INTEGER:
case Types.DOUBLE:
case Types.FLOAT:
return value.toString();
case Types.BIT:
return ((Boolean)value).booleanValue() ? "1" : "0";
case Types.DATE:
return value.toString(); // This will need some conversion.
default:
return "\""+value.toString()+"\"";
public void setValueAt(Object value, int row, int column) {
try {
String tableName = metaData.getTableName(column+1);
// Some of the drivers seem buggy, tableName should not be null.
if (tableName == null) {
System.out.println("Table name returned null.");
String columnName = getColumnName(column);
String query =
"update "+tableName+
" set "+columnName+" = "+dbRepresentation(column, value)+
" where ";
// We don't have a model of the schema so we don't know the
// primary keys or which columns to lock on. To demonstrate
// that editing is possible, we'll just lock on everything.
for(int col = 0; col<getColumnCount(); col++) {
String colName = getColumnName(col);
if (colName.equals("")) {
continue;
if (col != 0) {
query = query + " and ";
query = query + colName +" = "+
dbRepresentation(col, getValueAt(row, col));
System.out.println(query);
System.out.println("Not sending update to database");
// statement.executeQuery(query);
catch (SQLException e) {
// e.printStackTrace();
System.err.println("Update failed");
Vector dataRow = (Vector)rows.elementAt(row);
dataRow.setElementAt(value, column);
}Java 1.5 incorporates a very simple way to print from a JTable. I am using a mysql DB but it is the same concept. Review my code and let me know if you have any questions.
package emsmain;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;
import java.sql.*;
import java.text.MessageFormat;
import java.util.*;
import javax.print.*;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.swing.*;
import javax.swing.JTable;
import javax.swing.table.*;
import java.awt.print.*;
public class TableFromDatabase extends JFrame implements ActionListener{
JButton jbtprint = new JButton("Print Report");
JTable Reporttable;
Connection conn = Connect_Database.getConnection();
public TableFromDatabase()
Vector columnNames = new Vector();
Vector data = new Vector();
try{
String query = null;
Statement ps = null;
ResultSet rs = null;
//Class Master List
if (Report_Menu.jrbMaster_list.isSelected()){
query =("Select * from students") ;
//Classes taken by student
if (Report_Menu.jrbClass_taken.isSelected()){
String taken = Report_Menu.jtfStudent.getText();
query = ("select program.course_num, course_name, course_start_date, course_stat_desc from registration, program where student_id = '"+taken+"' and program.course_num = registration.course_num");
//Birthday report
if (Report_Menu.jrbBirthday.isSelected()){
String birthday = (String) Report_Menu.jcb_birthday.getSelectedItem();
query = ("SELECT student_id, fname, lname, address, city, state_name, zipcode, dob FROM students where substring(dob, 6,2) = '"+birthday+"'");
//Course Catologue
if (Report_Menu.jrbCourseCatologue.isSelected()){
String course = (String) Report_Menu.jcbChooseCourse.getSelectedItem();
query = ("select course_name, course_length, course_cost, course_credits from course where course_name = '"+course+"'");
//Certification expiration report
if (Report_Menu.jrbExpiration.isSelected()){
String month = (String) Report_Menu.jcbMonth.getSelectedItem();
String year = (String) Report_Menu.jcbYear.getSelectedItem();
query = ("SELECT FNAME, LNAME FROM STUDENTS, REGISTRATION WHERE substring(expiration_date, 6,2) = '"+month+"' and substring(expiration_date, 1,4) = '"+year+"' and registration.student_id = students.student_id") ;
//Class Roster
if (Report_Menu.jrbRoster.isSelected()){
String c_number = Report_Menu.jtfClassNumber.getText();
query = ("Select course_name, course_start_date, fname, lname from program, registration, students where program.course_num = '"+c_number+"' and registration.student_id = students.student_id;");
//Squad list and counts
if (Report_Menu.jrbSquadCount.isSelected()){
query = ("SELECT Squad_Name, count(student_id) from students group by Squad_Name");
//Student List
if (Report_Menu.jrbStudent_list.isSelected()){
String Choose_month = (String) Report_Menu.jcbcourse_month.getSelectedItem();
String Choose_Course = (String) Report_Menu.jcbcourse_name.getSelectedItem();
query = ("select count(student_id) from (registration, program) where program .course_name = '"+Choose_Course+"' and substring(course_start_date, 6,2) = '"+Choose_month+"'and registration.course_num = program.course_num;");
ps = conn.createStatement();
//Run Selected Report
ps.execute(query);
rs = ps.executeQuery(query);
ResultSetMetaData md = rs.getMetaData();
int columns = md.getColumnCount();
// Get column names
for (int i = 1; i <= columns; i++)
columnNames.addElement( md.getColumnName(i) );
// Get row data
while (rs.next())
Vector row = new Vector(columns);
for (int i = 1; i <= columns; i++)
row.addElement( rs.getObject(i) );
//add row data to JTable
data.addElement( row );
rs.close();
ps.close();
catch(Exception e)
JOptionPane.showMessageDialog(null,e.getMessage());
// Create Jtable with database data
Container c = getContentPane();
c.setLayout(new BorderLayout());
Reporttable = new JTable(data, columnNames);
JScrollPane scrollPane = new JScrollPane( Reporttable );
c.add( scrollPane );
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
buttonPanel.add(jbtprint);
c.add(buttonPanel,BorderLayout.SOUTH);
jbtprint.addActionListener(this);
public void actionPerformed(ActionEvent e){
if(e.getActionCommand().equals("Print Report")){
PrintForm();
public void PrintForm(){
try {
String name = null;
// Will display correct heading for print job
if (Report_Menu.jrbMaster_list.isSelected()){
name = "Master List";
if (Report_Menu.jrbBirthday.isSelected()){
name = "Birthday List";
if (Report_Menu.jrbClass_taken.isSelected()){
name = "Classes taken by Student";
if (Report_Menu.jrbCourseCatologue.isSelected()){
name = "Course Catalogue";
if (Report_Menu.jrbExpiration.isSelected()){
name = "Certification Expiration Report";
if (Report_Menu.jrbRoster.isSelected()){
name = "Class Roster";
if (Report_Menu.jrbSquadCount.isSelected()){
name = "Squad list with Student Counts";
if (Report_Menu.jrbStudent_list.isSelected()){
name = "Student count by Course";
// fetch the printable
Printable printable = Reporttable.getPrintable(JTable.PrintMode.FIT_WIDTH,
new MessageFormat(name),
new MessageFormat("Page - {0}"));
// fetch a PrinterJob
PrinterJob job = PrinterJob.getPrinterJob();
// set the Printable on the PrinterJob
job.setPrintable(printable);
// create an attribute set to store attributes from the print dialog
PrintRequestAttributeSet attr = new HashPrintRequestAttributeSet();
// display a print dialog and record whether or not the user cancels it
boolean printAccepted = job.printDialog(attr);
// if the user didn't cancel the dialog
if (printAccepted) {
try {
// do the printing (may need to handle PrinterException)
job.print(attr);
} catch (PrinterException ex) {
ex.printStackTrace();
} finally {
// restore the original table state here (for example, restore selection)
} -
How to add a JMenubar and a JTable in a JFrame in a single application
Hi all,
I require an urgent help from you.I am a beginer in programming Swing.I want to add a menu,combobox,and a table in a single application.I did coding as below:
package com.BSS;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.border.*;
import javax.swing.event.*;
public class newssa extends JFrame
public JMenuBar menuBar;
public JToolBar toolBar;
public JFrame frame;
private JLabel jLabel1;
private JLabel jLabel2;
private JLabel jLabel3;
private JLabel jLabel4;
private JLabel jLabel5;
private JLabel jLabel6;
private JComboBox jComboBox1;
private JComboBox jComboBox2;
private JComboBox jComboBox3;
private JComboBox jComboBox4;
private JComboBox jComboBox5;
private JComboBox jComboBox6;
private JTable jTable1;
private JScrollPane jScrollPane1;
private JPanel contentPane;
public newssa()
super();
initializeComponent();
this.setVisible(true);
private void initializeComponent()
jLabel1 = new JLabel();
jLabel2 = new JLabel();
jLabel3 = new JLabel();
jLabel4 = new JLabel();
jLabel5 = new JLabel();
jLabel6 = new JLabel();
jComboBox1 = new JComboBox();
jComboBox2 = new JComboBox();
jComboBox3 = new JComboBox();
jComboBox4 = new JComboBox();
jComboBox5 = new JComboBox();
jComboBox6 = new JComboBox();
frame=new JFrame();
//Included here
JMenuBar menuBar = new JMenuBar();
JMenu general = new JMenu("General");
menuBar.add(general);
JMenu actions =new JMenu("Actions");
menuBar.add(actions);
JMenu view=new JMenu("View");
menuBar.add(view);
JMenu Timescale=new JMenu("TimeScale");
menuBar.add(Timescale);
Timescale.add("Today CTRL+D");
Timescale.add("Current Week CTRL+W");
Timescale.add("Current Month CTRL+M");
Timescale.add("Current Quarter CTRL+Q");
Timescale.add("Current Year CTRL+Y");
Timescale.add("Custom TimeScale CTRL+U");
JMenu start=new JMenu("Start");
menuBar.add(start);
JMenu options=new JMenu("Options");
menuBar.add(options);
JMenu help=new JMenu("Help");
menuBar.add(help);
JFrame.setDefaultLookAndFeelDecorated(true);
frame.setJMenuBar(menuBar);
frame.pack();
frame.setVisible(true);
toolBar = new JToolBar("Formatting");
toolBar.addSeparator();
//Before this included new
String columnNames[] = { "ColorStatus", "Flash", "Service Order","Configuration","Configuration Description"};
// Create some data
String dataValues[][] =
{ "blue", "flash", "ORT001" },
{ "AVCONF", "av configuration with warrenty"}
// Create a new table instance
//jTable1 = new JTable( dataValues, columnNames );
jTable1 = new JTable(dataValues,columnNames);
jScrollPane1 = new JScrollPane(jTable1);
contentPane = (JPanel)this.getContentPane();
//scrollPane = new JScrollPane( table );
//topPanel.add( scrollPane, BorderLayout.CENTER );
// jLabel1
jLabel1.setText("Service Centers");
// jLabel2
jLabel2.setText("Service Areas");
// jLabel4
jLabel3.setText("Skills");
jLabel4.setText("Availablity Types");
// jLabel5
jLabel5.setText("From Date");
// jLabel6
jLabel6.setText("To");
// jComboBox1
jComboBox1.addItem("Coimbatore");
jComboBox1.addItem("Chennai");
jComboBox1.addItem("Mumbai");
jComboBox1.addItem("New Delhi");
jComboBox1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
jComboBox1_actionPerformed(e);
// jComboBox2
jComboBox2.addItem("North Zone");
jComboBox2.addItem("South Zone");
jComboBox2.addItem("Central Zone");
jComboBox2.addItem("Eastern Zone");
jComboBox2.addItem("Western Zone");
jComboBox2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
jComboBox2_actionPerformed(e);
// jComboBox3
jComboBox3.addItem("Microsoft Components");
jComboBox3.addItem("Java Technologies");
jComboBox3.addItem("ERP");
jComboBox3.addItem("Others");
jComboBox3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
jComboBox3_actionPerformed(e);
// jComboBox4
jComboBox4.addItem("One");
jComboBox4.addItem("Two");
jComboBox4.addItem("Three");
jComboBox4.addItem("Four");
jComboBox4.addItem("Five");
jComboBox4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
jComboBox4_actionPerformed(e);
// jComboBox5
jComboBox5.addItem("12/12/2004");
jComboBox5.addItem("13/12/2004");
jComboBox5.addItem("14/12/2004");
jComboBox5.setEditable(true);
jComboBox5.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
jComboBox5_actionPerformed(e);
// jComboBox6
jComboBox6.addItem("12/11/2004");
jComboBox6.addItem("13/11/2004");
jComboBox6.addItem("14/11/2004");
jComboBox6.setEditable(true);
jComboBox6.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
jComboBox6_actionPerformed(e);
// jTable1
jTable1.setModel(new DefaultTableModel(4, 4));
// jScrollPane1
jScrollPane1.setViewportView(jTable1);
// contentPane
contentPane.setLayout(null);
addComponent(contentPane, jLabel1, 2,29,84,18);
addComponent(contentPane, jLabel2, 201,33,76,18);
addComponent(contentPane, jLabel3, 384,32,59,18);
addComponent(contentPane, jLabel4, 2,77,85,18);
addComponent(contentPane, jLabel5, 197,79,84,18);
addComponent(contentPane, jLabel6, 384,80,60,18);
addComponent(contentPane, jComboBox1, 85,32,100,22);
addComponent(contentPane, jComboBox2, 276,32,100,22);
addComponent(contentPane, jComboBox3, 419,30,100,22);
addComponent(contentPane, jComboBox4, 88,76,100,22);
addComponent(contentPane, jComboBox5, 276,79,100,22);
addComponent(contentPane, jComboBox6, 421,78,100,22);
addComponent(contentPane, jScrollPane1, 33,158,504,170);
// newssa
this.setTitle("SSA Service Scheduler");
this.setLocation(new Point(0, 0));
this.setSize(new Dimension(560, 485));
/** Add Component Without a Layout Manager (Absolute Positioning) */
private void addComponent(Container container,Component c,int x,int y,int width,int height)
c.setBounds(x,y,width,height);
container.add(c);
// TODO: Add any appropriate code in the following Event Handling Methods
private void jComboBox1_actionPerformed(ActionEvent e)
int index = jComboBox1.getSelectedIndex();
switch(index)
case 0: System.out.println("Area Coimbatore Selected "); break;
case 1: System.out.println("Area Chennai selected"); break;
case 2: System.out.println("Mumbai being selected"); break;
case 3: System.out.println("New Delhi being selected"); break;
private void jComboBox2_actionPerformed(ActionEvent e)
int index = jComboBox2.getSelectedIndex();
switch(index)
case 0: System.out.println("North Zone Selcted "); break;
case 1: System.out.println("South Zone being selected"); break;
case 2: System.out.println("Central Zone being selected"); break;
case 3: System.out.println("Eastern Zone being selected"); break;
case 4: System.out.println("Western Zone being selected"); break;
private void jComboBox3_actionPerformed(ActionEvent e)
int index = jComboBox3.getSelectedIndex();
switch(index)
case 0: System.out.println("Microsoft Components being selected"); break;
case 1: System.out.println("Java Technologies being selected"); break;
case 2: System.out.println("ERP Tehnologies being selected"); break;
case 3: System.out.println("Other's selected"); break;
private void jComboBox4_actionPerformed(ActionEvent e)
int index = jComboBox4.getSelectedIndex();
switch(index)
case 0: System.out.println("One selected"); break;
case 1: System.out.println("Two selected"); break;
case 2: System.out.println("Three selected"); break;
case 3: System.out.println("Four selected"); break;
case 4: System.out.println("Five selected"); break;
private void jComboBox5_actionPerformed(ActionEvent e)
int index = jComboBox5.getSelectedIndex();
switch(index)
case 0: System.out.println("12/12/2004 being selected"); break;
case 1: System.out.println("13/12/2004 being selected"); break;
case 2: System.out.println("14/12/2004 being selected"); break;
private void jComboBox6_actionPerformed(ActionEvent e)
int index = jComboBox6.getSelectedIndex();
switch(index)
case 0: System.out.println("12/11/2004 being selected"); break;
case 1: System.out.println("13/11/2004 being selected"); break;
case 2: System.out.println("14/11/2004 being selected"); break;
public static void main(String[] args)
newssa ssa=new newssa();
//JFrame.setDefaultLookAndFeelDecorated(true);
//JDialog.setDefaultLookAndFeelDecorated(true);
//JFrame frame = new JFrame("SSA Service Scheduler");
//frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//frame.setJMenuBar(ssa.menuBar);
//frame.getContentPane( ).add(ssa.toolBar, BorderLayout.NORTH);
//frame.getContentPane( ).add(ssa.pane, BorderLayout.CENTER);
//frame.pack( );
//frame.setVisible(true);
try
//UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
catch (Exception ex)
System.out.println("Failed loading L&F: ");
System.out.println(ex);
But as a O/P ,I am getting menu in a seperate windos and the rest of the combobox and jtable in a seperate window.Kindly help me to solve the application.
VERY URGENT PLEASE..
Thanks in advance
with kind regds
Satheesh.KBut did u mean this as the next problem,Which I will come across..Yes, the second setVisible(true) seemed to be producing a smaller frame behind the main frame.
And your JMenuBar is declared twice, but not sure if this will affect the code - haven't read it all. -
Problem with RSA/AES and the wrapped Key
Hallo!
For a server-client communications, I would like to use a hybrid encryption.
For this I create an object of a serializable class that contains several properties, including the data that are to be transferred from A to B (Object, encrypted by AES), and the AES key, but wrapped by RSA (byte []).
My basic problem is, that if I send the wrapped key, I get at the destination another byte array and thus the key can not be decoded:
java.security.InvalidKeyException: Invalid AES key length: 256 bytes
When I look at the string representation of the byte array before sending and immediate after receiving, the byte arrays are diffrent. Why?
Extract from the encrypt method:
TransportObject obj = new TransportObject();
KeyGenerator keygen = KeyGenerator.getInstance("AES");
SecureRandom random = new SecureRandom();
keygen.init(random);
Key key = keygen.generateKey();
Cipher cipher = Cipher.getInstance("RSA/ECB/NoPadding");
cipher.init(Cipher.WRAP_MODE, publicKey);
byte[] wrappedKey = cipher.wrap(key);
// Here I put the byte array in the object to be transmitted
obj.setKey(wrappedKey);Extract from the decrypt method:
/ / Here I read the byte array from the received object
byte[] wrappedKey = obj.getKey();
Cipher cipher = Cipher.getInstance("RSA/ECB/NoPadding");
cipher.init(Cipher.UNWRAP_MODE, privateKey);
Key key = cipher.unwrap(wrappedKey, "AES", Cipher.SECRET_KEY);Here is the class that is serialized:
import java.io.Serializable;
public class TransportObject implements Serializable {
private static final long serialVersionUID = 5044061539587999682L;
private byte[] key;
private String type;
private byte[] data;
public static final int STRING = 1;
public static final int INT = 2;
public static final int CHAR = 3;
public TransportObject() {}
public TransportObject(byte[] key, String type, byte[] data) {
this.key = key;
this.type = type;
this.data = data;
public byte[] getKey() {
return key;
public void setKey(byte[] key) {
this.key = key;
}Sending is done via:
TransportObject obj = rsa.encrypt(objectToSend, keys.getPublicKey());
ObjectOutputStream os =
new ObjectOutputStream(socket.getOutputStream());
os.writeObject(obj);
os.flush();Receiving via
ois = new ObjectInputStream(
new BufferedInputStream(socket.getInputStream()));
TransportObject obj = (TransportObject) ois.readObject();
Object receivedObject = rsa.decrypt(obj, keys.getPrivateKey());Somehow, I hang down here.
Do I overlook something? Do I have an error in reasoning?
Thanks for any help!
Best regards
Sebastian Gohres
Edited by: Spencer82 on Aug 7, 2010 9:06 AM
Edited by: Spencer82 on Aug 7, 2010 9:08 AMDo I overlook something? Do I have an error in reasoning?I think at least 2.
1. Don't do this. The general problem has been solved. The solution is called TLS, and Java provides a API called the JSSE for you to use.
2.If you insist on rolling your own, don't specify NoPadding. Use PKCS1Padding. If you are going to use NoPadding, then you must provide your own padding scheme, which you have not. -
ALE Serialization on the basis of Data Value
Dear All ,
I have a query related to scheduling of Inbound IDOC .
I am using a scenario Legacy system to SAP using ALE layer communication . For Goods movement IDOC WPUWBW01 I am having 7 or 8 files and each files are posting one IDOC in SAP . Now since each files are having diffrent movement types so I need to serialize the posting of IDOC into SAP based on Movement type and I have to put a condition that file with movement type 303 should be posted first and then movement type 305 should be posted .
Approach : <b>I know ALE Serialization for the message type and used SAP Inbound Processing program RBDSER04 and did the serialization .</b>
<b>But I am not able to do serialization for Movement Type .Can anybody help me on this ? .</b>
Thanks & Regards
PrabhatThe scenario was similar. Files containing IDOCs (for goods movement) were posted to the system using custom ABAP. We wanted to ensure that the IDOCs are posted in sequence of movement type (we wanted 131 posted before 261 for example, even when 261 file came first).
One option is to create specific message types (say Z301 for bringing 301, Z302 for brining mvt 302 and so on) and then you can use your method to serialize based on message type. But, you will have quite a few Z msg type in this case (not a big issue, but not very sophisticated).
Other option might be to copy this program into a Z version. Inside, there is a sorting of IDOCs (search for SORT statement). This is to be modified so
- read data from edid4 for all idocs (in 64)
- map data to segments so as to get the mvt type
- store in a reference table (with idoc no and mvt type)
- apply your sort logic on this table to get the sequence of IDOCs
- proceed with standard logic to post data in this sequence.
Hope this helps. -
MTS with batch management, serialization and Handling unit
Hello All,
I am testing a scenario for MTS with batch management, serialization and Handling unit for discrete manufacturing.
Everything worked fine till I created the Handling unit for the finished product.
The production order has a quantity of 3 EA.
It has three serial numbers 1, 2 and 3. (serial numbers can be displayed from order->Header->serial numbers)
I created one Handling unit for production order quantity of 3 EA.
I tried to do a goods receipt for the production order using transaction COWBHUWE.
I get the following error when I try to post the GR:
Only 0 serial numbers entered instead of 3
Message no. IO304
Diagnosis
There is a serial number obligation, so the number of serial numbers must equal the number of serial numbers in the material document.
You can post the operation only if you entered the correct number of serial numbers previously.
System Response
Depending on the context in which the error arises, the system continues processing, or the required function cannot be performed.
Procedure
You have the following options, for example:
Check that the serial numbers are entered fully.
If necessary, display an error log.
If necessary, contact your system administrator.
What did I miss?
How to fix this problem?
Please help.
Thanks in advance
GeorgeI added the serialization procedure HUSL to the serial number profile and it fixed the problem.
-
How to Populate the JTable Object programatically with SQL Results
I'm wondering if someone could help me on how to populate the JTable Object with SQL Results wherein the Row of tjhe JTable object is automatically adjusted depending on how many records you have queried.
Thanks in advance and God bless! (",)
* frmMain.java
* Created on October 4, 2006, 6:15 AM
package tds;
import java.io.*;
import java.awt.Toolkit;
import javax.swing.JFrame;
import javax.imageio.*;
import javax.swing.JFrame;
import java.sql.*;
import javax.swing.table.DefaultTableModel;
* @author Dexter.Carlit
public class frmMain extends javax.swing.JFrame {
private Connection connection = null;
private DefaultTableModel model;
/** Creates new form frmMain */
public frmMain() {
initComponents();
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
private void initComponents() {
jSplitPane = new javax.swing.JSplitPane();
jScrollPane1 = new javax.swing.JScrollPane();
jPanel3 = new javax.swing.JPanel();
jScrollPane2 = new javax.swing.JScrollPane();
jTree1 = new javax.swing.JTree();
jTabbedPane1 = new javax.swing.JTabbedPane();
jPanel1 = new javax.swing.JPanel();
jPanel4 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jTextField2 = new javax.swing.JTextField();
jLabel3 = new javax.swing.JLabel();
jTextField3 = new javax.swing.JTextField();
jLabel4 = new javax.swing.JLabel();
jTextField4 = new javax.swing.JTextField();
jPanel5 = new javax.swing.JPanel();
jScrollPane3 = new javax.swing.JScrollPane();
jGrid = new javax.swing.JTable();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jProgressBar1 = new javax.swing.JProgressBar();
jPanel2 = new javax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowOpened(java.awt.event.WindowEvent evt) {
formWindowOpened(evt);
getAccessibleContext().setAccessibleName("frmMain");
jSplitPane.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED));
jSplitPane.setDividerLocation(200);
jSplitPane.setDividerSize(10);
jScrollPane2.setViewportView(jTree1);
org.jdesktop.layout.GroupLayout jPanel3Layout = new org.jdesktop.layout.GroupLayout(jPanel3);
jPanel3.setLayout(jPanel3Layout);
jPanel3Layout.setHorizontalGroup(
jPanel3Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jPanel3Layout.createSequentialGroup()
.add(jScrollPane2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 916, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
jPanel3Layout.setVerticalGroup(
jPanel3Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jScrollPane2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 410, Short.MAX_VALUE)
jScrollPane1.setViewportView(jPanel3);
jSplitPane.setLeftComponent(jScrollPane1);
jPanel4.setBorder(javax.swing.BorderFactory.createTitledBorder(""));
jLabel1.setText("First Name:");
jLabel2.setText("Last Name:");
jLabel3.setText("Position :");
jLabel4.setText("Department:");
jPanel5.setBorder(javax.swing.BorderFactory.createTitledBorder("Search Results"));
jGrid.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
new String [] {
"LName", "FName", "Position", "Department", "Office No", "Local No", "Office Mobile No", "Home No", "MobileNo", "Email Address"
jGrid.setAutoResizeMode(javax.swing.JTable.AUTO_RESIZE_OFF);
jGrid.setColumnSelectionAllowed(true);
jGrid.setName("");
jGrid.setTableHeader(jGrid.getTableHeader());
jScrollPane3.setViewportView(jGrid);
jScrollPane3.getAccessibleContext().setAccessibleName("rset");
org.jdesktop.layout.GroupLayout jPanel5Layout = new org.jdesktop.layout.GroupLayout(jPanel5);
jPanel5.setLayout(jPanel5Layout);
jPanel5Layout.setHorizontalGroup(
jPanel5Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jScrollPane3, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 386, Short.MAX_VALUE)
jPanel5Layout.setVerticalGroup(
jPanel5Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jScrollPane3, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 175, Short.MAX_VALUE)
jButton1.setText("Find");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jButton1MouseClicked(evt);
jButton2.setText("Clear");
jButton2.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jButton2MouseClicked(evt);
org.jdesktop.layout.GroupLayout jPanel4Layout = new org.jdesktop.layout.GroupLayout(jPanel4);
jPanel4.setLayout(jPanel4Layout);
jPanel4Layout.setHorizontalGroup(
jPanel4Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, jPanel4Layout.createSequentialGroup()
.addContainerGap()
.add(jPanel4Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(org.jdesktop.layout.GroupLayout.LEADING, jPanel5, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.add(org.jdesktop.layout.GroupLayout.LEADING, jPanel4Layout.createSequentialGroup()
.add(jLabel1)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jTextField1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 343, Short.MAX_VALUE))
.add(org.jdesktop.layout.GroupLayout.LEADING, jPanel4Layout.createSequentialGroup()
.add(jLabel2)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jTextField2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 343, Short.MAX_VALUE)
.add(1, 1, 1))
.add(org.jdesktop.layout.GroupLayout.LEADING, jPanel4Layout.createSequentialGroup()
.add(jLabel3)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jTextField3, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 138, Short.MAX_VALUE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jLabel4)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jTextField4, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 138, Short.MAX_VALUE))
.add(jPanel4Layout.createSequentialGroup()
.add(jButton1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 66, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jButton2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 66, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))
.addContainerGap())
jPanel4Layout.linkSize(new java.awt.Component[] {jButton1, jButton2}, org.jdesktop.layout.GroupLayout.HORIZONTAL);
jPanel4Layout.setVerticalGroup(
jPanel4Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jPanel4Layout.createSequentialGroup()
.addContainerGap()
.add(jPanel4Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(jLabel1)
.add(jTextField1))
.add(18, 18, 18)
.add(jPanel4Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(jLabel2)
.add(jTextField2))
.add(16, 16, 16)
.add(jPanel4Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(jLabel3)
.add(jTextField3)
.add(jLabel4)
.add(jTextField4))
.add(14, 14, 14)
.add(jPanel4Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(jButton2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.add(jButton1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jPanel5, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
org.jdesktop.layout.GroupLayout jPanel1Layout = new org.jdesktop.layout.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap()
.add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(org.jdesktop.layout.GroupLayout.LEADING, jPanel4, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.add(org.jdesktop.layout.GroupLayout.LEADING, jProgressBar1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 438, Short.MAX_VALUE))
.addContainerGap())
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap()
.add(jPanel4, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jProgressBar1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
jTabbedPane1.addTab("Search", jPanel1);
org.jdesktop.layout.GroupLayout jPanel2Layout = new org.jdesktop.layout.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 458, Short.MAX_VALUE)
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 401, Short.MAX_VALUE)
jTabbedPane1.addTab("Directory", jPanel2);
jSplitPane.setRightComponent(jTabbedPane1);
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jSplitPane, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 675, Short.MAX_VALUE)
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jSplitPane)
pack();
}// </editor-fold>//GEN-END:initComponents
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
}//GEN-LAST:event_jButton1ActionPerformed
private void jButton2MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jButton2MouseClicked
jGrid.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, null, null, null, null, null, null, null},
{null, null, null, null, null, null, null, null, null, null},
{null, null, null, null, null, null, null, null, null, null},
{null, null, null, null, null, null, null, null, null, null}
new String [] {
"LName", "FName", "Position", "Department", "Office No", "Local No", "Office Mobile No", "Home No", "MobileNo", "Email Address"
jGrid.updateUI();
}//GEN-LAST:event_jButton2MouseClicked
private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jButton1MouseClicked
try {
//Load and register SQL Server driver
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
//Establish a connection
Connection connection = DriverManager.getConnection("jdbc:microsoft:sqlserver://X.X.X.X:1433","MyAccount","MyPassword");
//Create a Statement object
Statement sql_stmt = connection.createStatement();
//Create a ResultSet object, execute the query and return a
// resultset
ResultSet rset = sql_stmt.executeQuery("SELECT * FROM EpxDirectory..Directory Order By LName");
// Populates a JTABLE Object
int i=0;
while (rset.next()){
String LName = rset.getString(1);
String FName = rset.getString(2);
String Position = rset.getString(3);
String Dept_Code = rset.getString(4);
String OffPhoneNo = rset.getString(5);
String LocalNo = rset.getString(6);
String OffMobileNo = rset.getString(7);
String HomePhoneNo = rset.getString(8);
String MobileNo = rset.getString(9);
String Email = rset.getString(10);
jGrid.updateUI();
jGrid.setValueAt(rset.getString(1).trim(),i,0);
jGrid.setValueAt(rset.getString(2).trim(),i,1);
jGrid.setValueAt(rset.getString(3).trim(),i,2);
jGrid.setValueAt(rset.getString(4).trim(),i,3);
jGrid.setValueAt(rset.getString(5).trim(),i,4);
jGrid.setValueAt(rset.getString(6).trim(),i,5);
jGrid.setValueAt(rset.getString(7).trim(),i,6);
jGrid.setValueAt(rset.getString(8).trim(),i,7);
jGrid.setValueAt(rset.getString(9).trim(),i,8);
jGrid.setValueAt(rset.getString(10).trim(),i,9);
i++;
//Close the ResultSet and Statement
rset.close();
sql_stmt.close();
//Close the database connection
connection.close();
System.out.println(Integer.toString(i) + " rows found");
} catch(Exception e) {
System.out.println("Failed to connect; Please view Stack Trace");
e.printStackTrace();
}//GEN-LAST:event_jButton1MouseClicked
private void formWindowOpened(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_formWindowOpened
}//GEN-LAST:event_formWindowOpened
public static void run(){
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
frmMain frmMain = new frmMain();
frmMain.setLocationRelativeTo(null); // Center the JFrame on the
frmMain.setVisible(true);
private void exitApplication() {
// try {
// //gui.putStatus("Closing the connection....please wait.....");
// if(connection != null) {
// // connection.close(); //Closing the connection object.
// } catch(SQLException ex) { //Trap SQLException
// //gui.putStatus(ex.toString());
System.exit(0); //Exit the aplication
* @param args the command line arguments
public static void main(String args[]) {
run();
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JTable jGrid;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JPanel jPanel4;
private javax.swing.JPanel jPanel5;
private javax.swing.JProgressBar jProgressBar1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JSplitPane jSplitPane;
private javax.swing.JTabbedPane jTabbedPane1;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
private javax.swing.JTextField jTextField3;
private javax.swing.JTextField jTextField4;
private javax.swing.JTree jTree1;
// End of variables declaration//GEN-END:variables
}Use code tags.
Don't mix GUI and JDBC together. Split them out into separate classes.
You have a good start, but you will need to loop through your resultset and also pull the ResultSet metaData for you column headings
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