GetContentPane() problem

Hi everyone,
I new in Swing package and for this reason, there is smth makes me confused about Swings's classes,
I can not keep the idea that why we always use getContentPane() method to add some component to the Frame container or set Layout ??
Thanks

Read the Swing tutorial on [url http://java.sun.com/docs/books/tutorial/uiswing/components/toplevel.html]How to Use Top Level Containers.

Similar Messages

Container a = getContentPane(); - Problem

Hello Guys,
As you can use this method successfuly on for JFrame. Is there any possibility to use it on a JPanel?
Basically, I have a class which extends JPanel. I am trying to use this method to design the components very efficiently using .setBounds().
However, I couldn't make it work.
Any Suggestions?
Thanks.

Well,
I have a class which extends JPanel with loads of components. I have extended it in order to control the frames faster. I have 3 different tabs, so basically I create the class and then pass it into Tab.
The reason why I said efficiently, it is really hard to design the components using borderlayout, flowlayout etc.. So I've decided to keep the layout null, and use setBounds instead. However, to use this I also be using getContentPane().
I have tried this -> Container contentPane = getContentPane(); in a class which extends JFrama, it worked fine as JFrame is part of Container. I need to use this in a class which extends JPanel only, to design the components as I want.
Thanks.

Problem in displaying data on panel in getContentPane...

I am working on a Swing based GUI application where i have a record set to be displayed. As i have to display the records in sets of 10. i am getting the records for the first time, but i am unable to add the next set of records when i hit a next button. next button is added with a functionality of getting the next set of records. i am able to display the output of next setof records in dos prompt, but unable to add the same to the panel.
i can send the code if required.....thanx.

How do you add them to the panel ? Using a Table ? Post some code ...

Problem with threads in my swing application

Hi,
I have some problem in running my swing app. Thre problem is related to threads.
What i am developing, is a gui framework where i can add different pluggable components to the framework.
The framework is working fine, but when i press the close action then the gui should close down the present component which is active. The close action is of the framework and the component has the responsibility of checking if it's work is saved or not and hence to throw a message for saving the work, therefore, what i have done is that i call the close method for the component in a separate thread and from my main thread i call the join method for the component's thread.But after join the whole gui hangs.
I think after the join method even the GUI thread , which is started for every gui, also waits for the component's thread to finish but the component thread can't finish because the gui thread is also waiting for the component to finish. This creates a deadlock situation.
I dont know wht's happening it's purely my guess.
One more thing. Why i am calling the component through a different thread, is because , if the component's work is not saved by the user then it must throw a message to save the work. If i continue this message throwing in my main thread only then the main thread doesnt wait for user press of the yes no or cancel button for saving the work . It immediately progresses to the next statement.
Can anybody help me get out of this?
Regards,
amazing_java

For my original bad thread version, I have rewritten it mimicking javax.swing.Timer
implementation, reducing average CPU usage to 2 - 3%.
Will you try this:
import javax.swing.*;
import java.awt.*;
import java.text.*;
import java.util.*;
public class SamurayClockW{
JFrame frame;
Container con;
ClockTextFieldW ctf;
public SamurayClockW(){
    frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    con = frame.getContentPane();
    ctf = new ClockTextFieldW();
    con.add(ctf, BorderLayout.SOUTH);
    frame.setBounds(100, 100, 300, 300);
    frame.setVisible(true);
    ctf.start();
public static void main(String[] args){
    new SamurayClockW();
class ClockTextFieldW extends JTextField implements Runnable{
String clock;
boolean running;
public ClockTextFieldW(){
    setEditable(false);
    setHorizontalAlignment(RIGHT);
public synchronized void start(){
    running = true;
    Thread t = new Thread(this);
    t.start();
public synchronized void stop(){
    running = false;
public synchronized void run(){
    SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
    try{
      while (running){
        clock = sdf.format(new Date());
        SwingUtilities.invokeLater(new Runnable(){
          public void run(){
            setText(clock);
        try{
          wait(1000);
        catch (InterruptedException ie){
          ie.printStackTrace();
    catch (ThreadDeath td){
      running = false;
}

Problem with threads in JFrame

Hy everyone...i have a small problem when i try to insert clock in my JFrame , because all i get is an empty text field.
What i do is that i create inner class that extends Thread and implements Runnable , but i dont know ... i saw some examples on the intrnet...but they are all for Applets...
Does any one know how i can implement this in JFrame (JTextField in JFrame).
Actually any material on threads in JFrame or JPanel would be great....THNX.

For my original bad thread version, I have rewritten it mimicking javax.swing.Timer
implementation, reducing average CPU usage to 2 - 3%.
Will you try this:
import javax.swing.*;
import java.awt.*;
import java.text.*;
import java.util.*;
public class SamurayClockW{
JFrame frame;
Container con;
ClockTextFieldW ctf;
public SamurayClockW(){
    frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    con = frame.getContentPane();
    ctf = new ClockTextFieldW();
    con.add(ctf, BorderLayout.SOUTH);
    frame.setBounds(100, 100, 300, 300);
    frame.setVisible(true);
    ctf.start();
public static void main(String[] args){
    new SamurayClockW();
class ClockTextFieldW extends JTextField implements Runnable{
String clock;
boolean running;
public ClockTextFieldW(){
    setEditable(false);
    setHorizontalAlignment(RIGHT);
public synchronized void start(){
    running = true;
    Thread t = new Thread(this);
    t.start();
public synchronized void stop(){
    running = false;
public synchronized void run(){
    SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
    try{
      while (running){
        clock = sdf.format(new Date());
        SwingUtilities.invokeLater(new Runnable(){
          public void run(){
            setText(clock);
        try{
          wait(1000);
        catch (InterruptedException ie){
          ie.printStackTrace();
    catch (ThreadDeath td){
      running = false;
}

Problem with setContentPane() in JFrame class

I recently discovered a problem with the setContentPane method in the JFrame class. When I use setContentPane(Container ..), the previously existing contentPane remains in the stack. I have tried nullifying getContentPane(), and all manner of things, but, each time I use setContentPane, I have another instance of a JPanel in the stack.
I'm using code similar to setContentPane(new CustomJPanel()); and each time the user changes screens, and a similar call to that is made, the old CustomJPanel instance remains in the stack. Can anyone suggest a way around this? On their own the panels do not take up very much memory, but after several hours of usage, they will build up.

I tried what you suggested; it only resulted in a huge performance decrease. The problem with memory allocation is still there.
Here is the method I use to switch screens in my app:
public static void changeScreen (JPanel panel){
          try{
               appFrame.setTitle("Wordinary : \""+getTitle()+"\"");
               appFrame.setContentPane(panel);
               appFrame.setSize(appFrame.getContentPane().getPreferredSize());
               appFrame.getContentPane().setBackground(backColour);
               for (int i = 0; i < appFrame.getContentPane().getComponents().length; i++)
                    appFrame.getContentPane().getComponents().setForeground(textColour);
               //System.out.println("Background colour set to "+backColour+" text colour set to "+textColour);
               appFrame.validate();
          catch (Exception e){
               //System.out.println("change");
               e.printStackTrace();
And it is called like this:
changeScreen(new AddWordPanel());The instantiation of the new instance is what is causing the memory problems, but I can't think of a way around it.

Problem with JPanel in JFrame

hai ashrivastava..
thank u for sending this one..now i got some more problems with that screen .. actually i am added one JPanel to JFrame with BorderLayout at south..the problem is when i am drawing diagram..the part of diagram bellow JPanel is now not visible...and one more problem is ,after adding 6 ro 7 buttons remaing buttons are not vissible..how to increase the size of that JPanel...to add that JPanel i used bellow code
JFrame f = new JFrame();
JPanel panel = new JPanel();
f.getContentPane().add(BorderLayout.SOUTH, panel);

Hi
JFrame f = new JFrame();
JPanel panel = new JPanel();
// Add this line to ur code with ur requiredWidth and requiredHeight
panel.setPreferredSize(new Dimension(requiredWidth,requiredHeight));
f.getContentPane().add(BorderLayout.SOUTH, panel);
This should solve ur problem
Ashish

Problem with JFrame and busy/wait Cursor

Hi -- I'm trying to set a JFrame's cursor to be the busy cursor,
for the duration of some operation (usually just a few seconds).
I can get it to work in some situations, but not others.
Timing does seem to be an issue.
There are thousands of posts on the BugParade, but
in general Sun indicates this is not a bug. I just need
a work-around.
I've written a test program below to demonstrate the problem.
I have the problem on Solaris, running with both J2SE 1.3 and 1.4.
I have not tested on Windows yet.
When you run the following code, three JFrames will be opened,
each with the same 5 buttons. The first "F1" listens to its own
buttons, and works fine. The other two (F2 and F3) listen
to each other's buttons.
The "BUSY" button simply sets the cursor on its listener
to the busy cursor. The "DONE" button sets it to the
default cursor. These work fine.
The "SLEEP" button sets the cursor, sleeps for 3 seconds,
and sets it back. This does not work.
The "INVOKE LATER" button does the same thing,
except is uses invokeLater to sleep and set the
cursor back. This also does not work.
The "DELAY" button sleeps for 3 seconds (giving you
time to move the mouse into the other (listerner's)
window, and then it behaves just like the "SLEEP"
button. This works.
Any ideas would be appreciated, thanks.
-J
import java.awt.BorderLayout;
import java.awt.Cursor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class BusyFrameTest implements ActionListener
private static Cursor busy = Cursor.getPredefinedCursor (Cursor.WAIT_CURSOR);
private static Cursor done = Cursor.getDefaultCursor();
JFrame frame;
JButton[] buttons;
public BusyFrameTest (String title)
frame = new JFrame (title);
buttons = new JButton[5];
buttons[0] = new JButton ("BUSY");
buttons[1] = new JButton ("DONE");
buttons[2] = new JButton ("SLEEP");
buttons[3] = new JButton ("INVOKE LATER");
buttons[4] = new JButton ("DELAY");
JPanel buttonPanel = new JPanel();
for (int i = 0; i < buttons.length; i++)
buttonPanel.add (buttons);
frame.getContentPane().add (buttonPanel);
frame.pack();
frame.setVisible (true);
public void addListeners (ActionListener listener)
for (int i = 0; i < buttons.length; i++)
buttons[i].addActionListener (listener);
public void actionPerformed (ActionEvent e)
System.out.print (frame.getTitle() + ": " + e.getActionCommand());
if (e.getActionCommand().equals ("BUSY"))
frame.setCursor (busy);
else if (e.getActionCommand().equals ("DONE"))
frame.setCursor (done);
else if (e.getActionCommand().equals ("SLEEP"))
frame.setCursor (busy);
try { Thread.sleep (3000); } catch (Exception ex) { }
frame.setCursor (done);
System.out.print (" finished");
else if (e.getActionCommand().equals ("INVOKE LATER"))
frame.setCursor (busy);
SwingUtilities.invokeLater (thread);
else if (e.getActionCommand().equals ("DELAY"))
try { Thread.sleep (3000); } catch (Exception ex) { }
frame.setCursor (busy);
try { Thread.sleep (3000); } catch (Exception ex) { }
frame.setCursor (done);
System.out.print (" finished");
System.out.println();
Runnable thread = new Runnable()
public void run()
try { Thread.sleep (3000); } catch (Exception ex) { }
frame.setCursor (done);
System.out.println (" finished");
public static void main (String[] args)
BusyFrameTest f1 = new BusyFrameTest ("F1");
f1.addListeners (f1);
BusyFrameTest f2 = new BusyFrameTest ("F2");
BusyFrameTest f3 = new BusyFrameTest ("F3");
f2.addListeners (f3); // 2 listens to 3
f3.addListeners (f2); // 3 listens to 2

I've had the same problems with cursors and repaints in a swing application, and I was thinking of if I could use invokeLater, but I never got that far with it.
I still believe you would need a thread for the time consuming task, and that invokeLater is something you only need to use in a thread different from the event thread.

File and FileInputStream problem

Hi all
I have downloaded from developpez.com a sample code to zip files. I modified it a bit to suit with my needs, and when I launched it, there was an exception. So I commented all the lines except for the first executable one; and when it succeeds then I uncomment the next executable line; and so on. When I arrived at the FileInputStream line , the exception raised. When I looked at the code, it seemed normal. So I want help how to solve it. Here is the code with the last executable line uncommented, and the exception stack :
// Copyright (c) 2001
package pack_zip;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import oracle.jdeveloper.layout.*;
import java.io.*;
import java.util.*;
import java.util.zip.*;
import java.text.*;
* A Swing-based top level window class.
* <P>
* @author a
public class fzip extends JFrame implements ActionListener{
JPanel jPanel1 = new JPanel();
XYLayout xYLayout1 = new XYLayout();
JTextField szdir = new JTextField();
JButton btn = new JButton();
JButton bzip = new JButton();
     * Taille générique du tampon en lecture et écriture
static final int BUFFER = 2048;
* Constructs a new instance.
public fzip() {
super("Test zip");
try {
jbInit();
catch (Exception e) {
e.printStackTrace();
* Initializes the state of this instance.
private void jbInit() throws Exception {
this.getContentPane().setLayout(xYLayout1);
     this.setSize(new Dimension(400, 300));
btn.setText("btn");
btn.setActionCommand("browse");
btn.setLabel("Browse ...");
btn.setFont(new Font("Dialog", 0, 14));
bzip.setText("bzip");
bzip.setActionCommand("zipper");
bzip.setLabel("Zipper");
bzip.setFont(new Font("Dialog", 0, 14));
btn.addActionListener(this);
bzip.addActionListener(this);
bzip.setEnabled(false);
     this.getContentPane().add(jPanel1, new XYConstraints(0, 0, -1, -1));
this.getContentPane().add(szdir, new XYConstraints(23, 28, 252, 35));
this.getContentPane().add(btn, new XYConstraints(279, 28, 103, 38));
this.getContentPane().add(bzip, new XYConstraints(128, 71, 103, 38));
public void actionPerformed(ActionEvent e)
if(e.getActionCommand() == "browse")
FileDialog fd = new FileDialog(this);
fd.setVisible(true);
szdir.setText(fd.getDirectory());
bzip.setEnabled(true);
else
          * Compression
     try {
          // création d'un flux d'écriture sur fichier
     FileOutputStream dest = new FileOutputStream("Test_archive.zip");
          // calcul du checksum : Adler32 (plus rapide) ou CRC32
     CheckedOutputStream checksum = new CheckedOutputStream(dest, new Adler32());
          // création d'un buffer d'écriture
     BufferedOutputStream buff = new BufferedOutputStream(checksum);
          // création d'un flux d'écriture Zip
     ZipOutputStream out = new ZipOutputStream(buff);
     // spécification de la méthode de compression
     out.setMethod(ZipOutputStream.DEFLATED);
          // spécifier la qualité de la compression 0..9
     out.setLevel(Deflater.BEST_COMPRESSION);
     // buffer temporaire des données à écriture dans le flux de sortie
     byte data[] = new byte[BUFFER];
          // extraction de la liste des fichiers du répertoire courant
     File f = new File(szdir.getText());
     String files[] = f.list();
          // pour chacun des fichiers de la liste
     for (int i=0; i<files.length; i++) {
               // en afficher le nom
          System.out.println("Adding: "+files);
// création d'un flux de lecture
FileInputStream fi = new FileInputStream(files[i]);
/* // création d'un tampon de lecture sur ce flux
BufferedInputStream buffi = new BufferedInputStream(fi, BUFFER);
// création d'en entrée Zip pour ce fichier
ZipEntry entry = new ZipEntry(files[i]);
// ajout de cette entrée dans le flux d'écriture de l'archive Zip
out.putNextEntry(entry);
// écriture du fichier par paquet de BUFFER octets
// dans le flux d'écriture
int count;
while((count = buffi.read(data, 0, BUFFER)) != -1) {
          out.write(data, 0, count);
               // Close the current entry
out.closeEntry();
// fermeture du flux de lecture
          buffi.close();*/
/*     // fermeture du flux d'écriture
     out.close();
     buff.close();
     checksum.close();
     dest.close();
     System.out.println("checksum: " + checksum.getChecksum().getValue());*/
     // traitement de toute exception
catch(Exception ex) {
          ex.printStackTrace();
And here is the error stack :
"D:\jdev32\java1.2\jre\bin\javaw.exe" -mx50m -classpath "D:\jdev32\myclasses;D:\jdev32\lib\jdev-rt.zip;D:\jdev32\jdbc\lib\oracle8.1.7\classes12.zip;D:\jdev32\lib\connectionmanager.zip;D:\jdev32\lib\jbcl2.0.zip;D:\jdev32\lib\jgl3.1.0.jar;D:\jdev32\java1.2\jre\lib\rt.jar" pack_zip.czip
Adding: accueil188.cfm
java.io.FileNotFoundException: accueil188.cfm (Le fichier spécifié est introuvable.
     void java.io.FileInputStream.open(java.lang.String)
     void java.io.FileInputStream.<init>(java.lang.String)
     void pack_zip.fzip.actionPerformed(java.awt.event.ActionEvent)
     void javax.swing.AbstractButton.fireActionPerformed(java.awt.event.ActionEvent)
     void javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(java.awt.event.ActionEvent)
     void javax.swing.DefaultButtonModel.fireActionPerformed(java.awt.event.ActionEvent)
     void javax.swing.DefaultButtonModel.setPressed(boolean)
     void javax.swing.plaf.basic.BasicButtonListener.mouseReleased(java.awt.event.MouseEvent)
     void java.awt.Component.processMouseEvent(java.awt.event.MouseEvent)
     void java.awt.Component.processEvent(java.awt.AWTEvent)
     void java.awt.Container.processEvent(java.awt.AWTEvent)
     void java.awt.Component.dispatchEventImpl(java.awt.AWTEvent)
     void java.awt.Container.dispatchEventImpl(java.awt.AWTEvent)
     void java.awt.Component.dispatchEvent(java.awt.AWTEvent)
     void java.awt.LightweightDispatcher.retargetMouseEvent(java.awt.Component, int, java.awt.event.MouseEvent)
     boolean java.awt.LightweightDispatcher.processMouseEvent(java.awt.event.MouseEvent)
     boolean java.awt.LightweightDispatcher.dispatchEvent(java.awt.AWTEvent)
     void java.awt.Container.dispatchEventImpl(java.awt.AWTEvent)
     void java.awt.Window.dispatchEventImpl(java.awt.AWTEvent)
     void java.awt.Component.dispatchEvent(java.awt.AWTEvent)
     void java.awt.EventQueue.dispatchEvent(java.awt.AWTEvent)
     boolean java.awt.EventDispatchThread.pumpOneEvent()
     void java.awt.EventDispatchThread.pumpEvents(java.awt.Conditional)
     void java.awt.EventDispatchThread.run()
Thank you very much

One easy way to send a file through RMI is to read all bytes of a file to a byte array and send this array as a parameter of a remote method. But of course you may have problems with memory when you send large files. The receive is simillary.
Other way is to split the file and getting slices of the file, sending slices and re-assemble at destination. This assume that the file isn't changed through the full transfering is concluded.
I hope these could help you.

URGENT HELP NEEDED FOR JTABLE PROBLEM!!!!!!!!!!!!!!!!!

firstly i made a jtable to adds and deletes rows and passes the the data to the table model from some textfields. then i wanted to add a tablemoselistener method in order to change the value in the columns 1,2,3,4 and set the result of them in the column 5. when i added that portion of code the buttons that added and deleted rows had problems to function correctly..they dont work at all..can somebody have a look in my code and see wot is wrong..thanx in advance..
below follows the code..sorry for the mesh of the code..you can use and run the code and notice the problem when you press the add button..also if you want delete the TableChanged method to see that the add button works perfect.
* Created on 03-Aug-2005
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
* @author Administrator
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import java.io.*;
public class NodesTable extends JFrame implements TableModelListener, ActionListener {
JTable jt;
DefaultTableColumnModel dtcm;
TableColumn column[] = new TableColumn[100];
DefaultTableModel dtm;
JLabel Name,m1,w1,m2,w2;
JTextField NameTF,m1TF,w1TF,m2TF,w2TF;
String c [] ={ "Name", "Assessment1", "Weight1" , "Assessment2","Weight2 ","TotalMark"};
float x=0,y=0,tMark=0,z = 0;
float j=0;
int i;
     JButton DelButton;
     JButton AddButton;
     JScrollPane scrollPane;
     JPanel mainPanel,buttonPanel;
     JFrame frame;
     Object[][] data =
          {"tami", new Float(1), new Float(1.11), new Float(1.11),new Float(1),new Float(1)},
          {"tami", new Float(1), new Float(2.22), new Float(2.22),new Float(1),new Float(1)},
          {"petros", new Float(1), new Float(3.33), new Float(3.33),new Float(1),new Float(1)},
          {"petros", new Float(1), new Float(4.44), new Float(4.44),new Float(1),new Float(1)}
public NodesTable() {
super("Student Marking Spreadsheet");
this.AddNodesintoTable();
setSize(400,250);
setVisible(true);
public void AddNodesintoTable(){
// Create a vector object and load them with the data
// to be placed on each row of the table
dtm = new DefaultTableModel(data,c);
dtm.addTableModelListener( this );
jt = new JTable(dtm){
     // Returning the Class of each column will allow different
          // renderers to be used based on Class
          public Class getColumnClass(int column)
               return getValueAt(0, column).getClass();
          // The Cost is not editable
          public boolean isCellEditable(int row, int column)
               int modelColumn = convertColumnIndexToModel( column );
               return (modelColumn == 5) ? false : true;
//****************************User Input**************************
//Add another node
//Creating and setting the properties
//of the panel's component (panels and textfields)
Name = new JLabel("Name");
Name.setForeground(Color.black);
m1 = new JLabel("Mark1");
m1.setForeground(Color.black);
w1 = new JLabel("Weigth1");
w1.setForeground(Color.black);
m2= new JLabel("Mark2");
m2.setForeground(Color.black);
w2 = new JLabel("Weight2");
w2.setForeground(Color.black);
NameTF = new JTextField(5);
NameTF.setText("Node");
m1TF = new JTextField(5);
w1TF = new JTextField(5);
m2TF=new JTextField(5);
w2TF=new JTextField(5);
//creating the buttons
JPanel buttonPanel = new JPanel();
AddButton=new JButton("Add Row");
DelButton=new JButton("Delete") ;
buttonPanel.add(AddButton);
buttonPanel.add(DelButton);
//adding the components to the panel
JPanel inputpanel = new JPanel();
inputpanel.add(Name);
inputpanel.add(NameTF);
inputpanel.add(m1);
inputpanel.add(m1TF);
inputpanel.add(w1);
inputpanel.add(w1TF);
inputpanel.add(m2);
inputpanel.add(m2TF);
inputpanel.add(w2TF);
inputpanel.add(w2);
inputpanel.add(AddButton);
inputpanel.add(DelButton);
//creating the panel and setting its properties
JPanel tablepanel = new JPanel();
tablepanel.add(new JScrollPane(jt, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED
, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS));
getContentPane().add(tablepanel, BorderLayout.CENTER);
getContentPane().add(inputpanel, BorderLayout.SOUTH);
//Method to add row for each new entry
public void addRow()
Vector r=new Vector();
r=createBlankElement();
dtm.addRow(r);
jt.addNotify();
public Vector createBlankElement()
Vector t = new Vector();
t.addElement((String) " ");
t.addElement((String) " ");
t.addElement((String) " ");
t.addElement((String) " ");
t.addElement((String) " ");
return t;
// Method to delete a row from the spreadsheet
void deleteRow(int index)
if(index!=-1) //At least one Row in Table
dtm.removeRow(index);
jt.addNotify();
// Method that adds and deletes rows
// from the table by pressing the
//corresponding buttons
public void actionPerformed(ActionEvent ae){
     Float z=new Float (m2TF.getText());
String Name= NameTF.getText();
Float x= new Float(m1TF.getText());
Float y= new Float(w1TF.getText());
Float j=new Float (w2TF.getText());
JFileChooser jfc2 = new JFileChooser();
String newdata[]= {Name,String.valueOf(x),String.valueOf(y),
String.valueOf(z),String.valueOf(j)};
Object source = ae.getSource();
if(ae.getSource() == (JButton)AddButton)
addRow();
if (ae.getSource() ==(JButton) DelButton)
deleteRow(jt.getSelectedRow());
//method to calculate the total mark in the TotalMark column
//that updates the values in every other column
//It takes the values from the column 1,2,3,4
//and changes the value in the column 5
public void tableChanged(TableModelEvent e) {
     System.out.println(e.getSource());
     if (e.getType() == TableModelEvent.UPDATE)
          int row = e.getFirstRow();
          int column = e.getColumn();
          if (column == 1 || column == 2 ||column == 3 ||column == 4)
               TableModel model = jt.getModel();
          float     q= ((Float)model.getValueAt(row,1)).floatValue();
          float     w= ((Float)model.getValueAt(row,2)).floatValue();
          float     t= ((Float)model.getValueAt(row,3)).floatValue();
          float     r= ((Float)model.getValueAt(row,4)).floatValue();
               Float tMark = new Float((q*w+t*r)/(w+r) );
               model.setValueAt(tMark, row, 5);
// Which cells are editable.
// It is only necessary to implement this method
// if the table is editable
public boolean isCellEditable(int row, int col)
{ return true; //All cells are editable
public static void main(String[] args) {
     NodesTable t=new NodesTable();
}

There are too many mistakes in your program. It looks like you are new to java.
Your add and delete row buttons are not working because you haven't registered your action listener with these buttons.
I have modifide your code and now it works fine. Just put some validation code for the textboxes becuase it throws exception when user presses add button without entering anything.
Here is the updated code: Do the diff and u will know my changes
* Created on 03-Aug-2005
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
* @author Administrator
* TODO To change the template for this generated type comment go to Window -
* Preferences - Java - Code Style - Code Templates
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableColumnModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
public class NodesTable extends JFrame implements TableModelListener,
          ActionListener {
     JTable jt;
     DefaultTableColumnModel dtcm;
     TableColumn column[] = new TableColumn[100];
     DefaultTableModel dtm;
     JLabel Name, m1, w1, m2, w2;
     JTextField NameTF, m1TF, w1TF, m2TF, w2TF;
     String c[] = { "Name", "Assessment1", "Weight1", "Assessment2", "Weight2 ",
               "TotalMark" };
     float x = 0, y = 0, tMark = 0, z = 0;
     float j = 0;
     int i;
     JButton DelButton;
     JButton AddButton;
     JScrollPane scrollPane;
     JPanel mainPanel, buttonPanel;
     JFrame frame;
     public NodesTable() {
          super("Student Marking Spreadsheet");
          this.AddNodesintoTable();
          setSize(400, 250);
          setVisible(true);
     public void AddNodesintoTable() {
          // Create a vector object and load them with the data
          // to be placed on each row of the table
          dtm = new DefaultTableModel(c,0);
          dtm.addTableModelListener(this);
          jt = new JTable(dtm) {
               // The Cost is not editable
               public boolean isCellEditable(int row, int column) {
                    int modelColumn = convertColumnIndexToModel(column);
                    return (modelColumn == 5) ? false : true;
          //****************************User Input**************************
          //Add another node
          //Creating and setting the properties
          //of the panel's component (panels and textfields)
          Name = new JLabel("Name");
          Name.setForeground(Color.black);
          m1 = new JLabel("Mark1");
          m1.setForeground(Color.black);
          w1 = new JLabel("Weigth1");
          w1.setForeground(Color.black);
          m2 = new JLabel("Mark2");
          m2.setForeground(Color.black);
          w2 = new JLabel("Weight2");
          w2.setForeground(Color.black);
          NameTF = new JTextField(5);
          NameTF.setText("Node");
          m1TF = new JTextField(5);
          w1TF = new JTextField(5);
          m2TF = new JTextField(5);
          w2TF = new JTextField(5);
          //creating the buttons
          JPanel buttonPanel = new JPanel();
          AddButton = new JButton("Add Row");
          AddButton.addActionListener(this);
          DelButton = new JButton("Delete");
          DelButton.addActionListener(this);
          buttonPanel.add(AddButton);
          buttonPanel.add(DelButton);
          //adding the components to the panel
          JPanel inputpanel = new JPanel();
          inputpanel.add(Name);
          inputpanel.add(NameTF);
          inputpanel.add(m1);
          inputpanel.add(m1TF);
          inputpanel.add(w1);
          inputpanel.add(w1TF);
          inputpanel.add(m2);
          inputpanel.add(m2TF);
          inputpanel.add(w2TF);
          inputpanel.add(w2);
          inputpanel.add(AddButton);
          inputpanel.add(DelButton);
          //creating the panel and setting its properties
          JPanel tablepanel = new JPanel();
          tablepanel.add(new JScrollPane(jt,
                    JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                    JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS));
          getContentPane().add(tablepanel, BorderLayout.CENTER);
          getContentPane().add(inputpanel, BorderLayout.SOUTH);
     //Method to add row for each new entry
     public void addRow() {
          Float z = new Float(m2TF.getText());
          String Name = NameTF.getText();
          Float x = new Float(m1TF.getText());
          Float y = new Float(w1TF.getText());
          Float j = new Float(w2TF.getText());
          String newdata[] = { Name, String.valueOf(x), String.valueOf(y),
                    String.valueOf(z), String.valueOf(j) };
          dtm.addRow(newdata);
     // Method to delete a row from the spreadsheet
     void deleteRow(int index) {
          if (index != -1) //At least one Row in Table
               dtm.removeRow(index);
               jt.addNotify();
     // Method that adds and deletes rows
     // from the table by pressing the
     //corresponding buttons
     public void actionPerformed(ActionEvent ae) {
          Object source = ae.getSource();
          if (ae.getSource() == (JButton) AddButton) {
               addRow();
          if (ae.getSource() == (JButton) DelButton) {
               deleteRow(jt.getSelectedRow());
     //method to calculate the total mark in the TotalMark column
     //that updates the values in every other column
     //It takes the values from the column 1,2,3,4
     //and changes the value in the column 5
     public void tableChanged(TableModelEvent e) {
          System.out.println(e.getSource());
          //if (e.getType() == TableModelEvent.UPDATE) {
               int row = e.getFirstRow();
               int column = e.getColumn();
               if (column == 1 || column == 2 || column == 3 || column == 4) {
                    TableModel model = jt.getModel();
                    float q = (new Float(model.getValueAt(row, 1).toString())).floatValue();
                    float w = (new Float(model.getValueAt(row, 2).toString())).floatValue();
                    float t = (new Float(model.getValueAt(row, 3).toString())).floatValue();
                    float r = (new Float(model.getValueAt(row, 4).toString())).floatValue();
                    Float tMark = new Float((q * w + t * r) / (w + r));
                    model.setValueAt(tMark, row, 5);
     // Which cells are editable.
     // It is only necessary to implement this method
     // if the table is editable
     public boolean isCellEditable(int row, int col) {
          return true; //All cells are editable
     public static void main(String[] args) {
          NodesTable t = new NodesTable();
}

Problem with PDFBox-0.7.3 library - Runtime Error

Hello,
The problem is inside the method "chamaConversor".
" conversor.pdfToText(arquivoPdf,arquivoTxt);" make a file.txt from one file.pdf. After that it don?t return the control to "ConstrutorDeTemplate2.java", and show the following error message:
Exception in thread "AWT-EventQueue-O" java.lang.NoClassDefFoundError : org/fontbox/afm/FontMetric
at org.pdfbox.pdmodel.font.PDFont.getAFM (PDFont.java:334)
I am using the NetBeans IDE 5.5.
I have added all of these libraries below to my project from c:\Program Files\netbeans-5.5\PDFBox-0.7.3\external:
* FontBox-0.1.0-dev.jar
* ant.jar
* bcmail-jdk14-132.jar
* junit.jar
* bcprov-jdk14-132.jar
* lucene-core-2.0.0.jar
* checkstyle-all-4.2.jar
* lucene-demos-2.0.0.jar
and PDFBox-0.7.3.jar from c:\Program Files\netbeans-5.5\PDFBox-0.7.3\lib.
There are no more jar from PDFBox-0.7.3 directory.
All of these libraries are in "Compile-time Libraries" option in Project Properties. Should I add they to "Run-time Libraries" option?
What is going on?
Thank you!
* ConstrutorDeTemplate2.java
* Created on 11 de Agosto de 2007, 14:54
* @author
package br.unifacs.dis2007.template2;
// Java core packages
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.text.*;
import java.util.*;
// Java extension packages
import javax.swing.*;
import org.pdfbox.*;
public class ConstrutorDeTemplate2 extends JFrame
    implements ActionListener {
    private JTextField enterField;
    private JTextArea outputArea;
    private BufferedWriter out;
    private String word;
    private PdfToText conversor = new PdfToText();
    // ajusta a interface do usu?rio
    public ConstrutorDeTemplate2()
       super( "Testing class File" );
       enterField = new JTextField("Digite aqui o nome do arquivo :" );
       enterField.addActionListener( this );
       outputArea = new JTextArea();
       ScrollPane scrollPane = new ScrollPane();
       scrollPane.add( outputArea );
       Container container = getContentPane();
       container.add( enterField, BorderLayout.NORTH );
       container.add( scrollPane, BorderLayout.CENTER );
       setSize( 400, 400 );
       show();
    // Exibe as informa??es sobre o arquivo especificado pelo usu?rio
    public void actionPerformed( ActionEvent actionEvent )
       File name = new File( actionEvent.getActionCommand() );
       // Se o arquivo existe, envia para a sa?da as informa??es sobre ele
       if ( name.exists() ) {
          outputArea.setText(
             name.getName() + " exists\n" +
             ( name.isFile () ?
                "is a file\n" : "is not a file\n" ) +
             ( name.isDirectory() ?
                "is a directory\n" : "is not a directory\n" ) +
             ( name.isAbsolute() ? "is absolute path\n" :
                "is not absolute path\n" ) +
             "Last modified: " + name.lastModified() +
             "\nLength: " + name.length () +
             "\nPath: " + name.getPath() +
             "\nAbsolute path: " + name.getAbsolutePath() +
             "\nParent: " + name.getParent() );
          // informa??o de sa?da se "name" ? um arquivo
          if ( name.isFile() ) {
             String nameString = String.valueOf(name.getPath());
             String nameTeste = new String(nameString);
             if (nameString.endsWith(".pdf"))
                 nameTeste = chamaConversor(nameString);
             else
                 if (nameString.endsWith(".doc"))
                     nameTeste = chamaConversorDoc(nameString); // chama conversor de arquivos DOC
                 else
                     if (nameString.endsWith(".txt"))
                         nameTeste = nameString;
             // se o arquivo termina com ".txt"
             if (nameTeste.endsWith(".txt"))
                 // acrescenta conte?do do arquivo ? ?rea de sa?da
                 try {
                     // Create the tokenizer to read from a file
                     FileReader rd = new FileReader(nameTeste);
                     StreamTokenizer st = new StreamTokenizer(rd);
                     // Prepare the tokenizer for Java-style tokenizing rules
                     st.parseNumbers();
                     st.wordChars('_', '_');
                     st.eolIsSignificant (true);
                     // If whitespace is not to be discarded, make this call
                     st.ordinaryChars(0, ' ');
                     // These calls caused comments to be discarded
                     st.slashSlashComments(true);
                     st.slashStarComments(true);
                     // Parse the file
                     int token = st.nextToken();
                     String word_ant = "";
                     outputArea.append( " \n" );
                     out = new BufferedWriter(new FileWriter(nameTeste, true));
                     while (token != StreamTokenizer.TT_EOF) {
                         token = st.nextToken();
                         if (token == StreamTokenizer.TT_EOL){
                             //out.write(word);
                             out.flush();
                             out = new BufferedWriter(new FileWriter(nameTeste, true));
                             //outputArea.append( word + "\n" );
                             // out.append ( "\n" );
                         switch (token) {
                         case StreamTokenizer.TT_NUMBER:
                             // A number was found; the value is in nval
                             double num = st.nval;
                             break;
                         case StreamTokenizer.TT_WORD:
                             // A word was found; the value is in sval
                             word = st.sval;
                             //   if (word_ant.equals("a") || word_ant.equals("an") || word_ant.equals("the") || word_ant.equals("The") || word_ant.equals("An"))
                             outputArea.append( word.toString() + " \n " );
                            // out.append( word + "   " );
                             //     word_ant = word;
                             break;
                         case '"':
                             // A double-quoted string was found; sval contains the contents
                             String dquoteVal = st.sval;
                             break;
                         case '\'':
                             // A single-quoted string was found; sval contains the contents
                             String squoteVal = st.sval;
                             break;
                         case StreamTokenizer.TT_EOL:
                             // End of line character found
                             break;
                         case StreamTokenizer.TT_EOF:
                             // End of file has been reached
                             break;
                         default:
                             // A regular character was found; the value is the token itself
                             char ch = (char)st.ttype;
                             break;
                         } // fim do switch
                     } // fim do while
                     rd.close();
                     out.close();
                 } // fim do try
                 // process file processing problems
                 catch( IOException ioException ) {
                     JOptionPane.showMessageDialog( this,
                     "FILE ERROR",
                     "FILE ERROR", JOptionPane.ERROR_MESSAGE );
             } // fim do if da linha 92 - testa se o arquivo ? do tipo texto
          } // fim do if da linha 78 - testa se ? um arquivo
          // output directory listing
          else if ( name.isDirectory() ) {
                 String directory[] = name.list();
             outputArea.append( "\n\nDirectory contents:\n");
             for ( int i = 0; i < directory.length; i++ )
                outputArea.append( directory[ i ] + "\n" );
          } // fim do else if da linha 184 - testa se ? um diret?rio
       } // fim do if da linha 62 - testa se o arquivo existe
       // not file or directory, output error message
       else {
          JOptionPane.showMessageDialog( this,
             actionEvent.getActionCommand() + " Does Not Exist",
             "ERROR", JOptionPane.ERROR_MESSAGE );
    } // fim do m?todo actionPerformed
    // m?todo que chama o conversor
    public String chamaConversor(String arquivoPdf){
        String arquivoTxt = new String(arquivoPdf);
        arquivoTxt = arquivoPdf.replace(".pdf", ".txt");
        try {
            conversor.pdfToText(arquivoPdf,arquivoTxt);
        catch (Exception ex) {
            ex.printStackTrace();
        return (arquivoTxt);
    // executa a aplica??o
    public static void main( String args[] )
       ConstrutorDeTemplate2 application = new ConstrutorDeTemplate2();
       application.setDefaultCloseOperation (
          JFrame.EXIT_ON_CLOSE );
    } // fim do m?todo main
} // fim da classe ExtratorDeSubstantivos2
* PdfToText.java
* Created on 11 de Agosto de 2007, 10:57
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
//package br.unifacs.dis2007.template2;
* @author www
package br.unifacs.dis2007.template2;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.MalformedURLException;
import java.net.URL ;
import org.pdfbox.pdmodel.PDDocument;
import org.pdfbox.pdmodel.encryption.AccessPermission;
import org.pdfbox.pdmodel.encryption.StandardDecryptionMaterial;
import org.pdfbox.util.PDFText2HTML;
import org.pdfbox.pdmodel.font.PDFont.* ;
import org.pdfbox.util.PDFTextStripper;
import org.pdfbox.util.*;
import org.pdfbox.pdmodel.*;
public class PdfToText
    public void pdfToText( String pdfFile, String textFile) throws Exception
            Writer output = null;
            PDDocument document = null;
            try
                try
                    //basically try to load it from a url first and if the URL
                    //is not recognized then try to load it from the file system.
                    URL url = new URL( pdfFile );
                    document = PDDocument.load( url );
                    String fileName = url.getFile();
                    if( textFile == null && fileName.length () >4 )
                        File outputFile =
                            new File( fileName.substring( 0,fileName.length() -4 ) + ".txt" );
                        textFile = outputFile.getName();
                catch( MalformedURLException e )
                    document = PDDocument.load( pdfFile );
                    if( textFile == null && pdfFile.length() >4 )
                        textFile = pdfFile.substring( 0,pdfFile.length() -4 ) + ".txt";
                   //use default encoding
                  output = new OutputStreamWriter( new FileOutputStream( textFile ) );
                PDFTextStripper stripper = null;
                stripper = new PDFTextStripper();
                stripper.writeText( document, output );
            finally
                if( output != null )
                    output.close();
                if( document != null )
                    document.close();
            }//finally
        }//end funcao

All of these libraries are in "Compile-time
Libraries" option in Project Properties. Should I add
they to "Run-time Libraries" option?Yes

ActionListener Problem - Event not triggering properly

Hello,
I have slight problem ith action listeners. Below is an exercise from a book on java i'm reading. I have constructed rectangle with 3 circles inside.
When the button in one panel is pushed the colors of these cicles should change from green,black,black to black,yellow,black to black,black,red and start over.
When the button is clicked the event isn't triggered. However when I push the button and click the frame of the window the colors change.
I would be grateful if anyone could explain why this is happening?
// Zepang
import javax.swing.*;
import java.awt.*;
public class Pp415
     public static void main(String [] args)
          JFrame frame = new JFrame("Traffic Lights");
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          Prime panel = new Prime();
          frame.getContentPane().add(panel);
          frame.pack();
          frame.setVisible(true);
     JButton lightButton = new JButton("Change the Lights!");
     lightButton.addActionListener(this);
     buttonLight.add(lightButton);
        add(buttonLight);
     add(light);
     int color = 0;
     public void actionPerformed (ActionEvent event)
          Color g = light.getGreenLight();
          Color y= light.getYellowLight();
          Color r= light.getRedLight();
          if (g.equals(Color.green))
               light.setGreenLight(Color.black);
               light.setYellowLight(Color.yellow);
          if (y.equals(Color.yellow))
               light.setYellowLight(Color.black);
               light.setRedLight(Color.red);
          if (r.equals(Color.red))
               light.setRedLight(Color.black);
               light.setGreenLight(Color.green);
import javax.swing.*;
import java.awt.*;
class TrafficLight extends JPanel
     Color redLight = Color.black;
     Color yellowLight = Color.black;
     Color greenLight = Color.green;
public TrafficLight()
     setBackground(Color.black);
     setPreferredSize(new Dimension (200,300));
public void setRedLight(Color c)
     redLight = c;
public void setYellowLight(Color c)
     yellowLight = c;
public void setGreenLight(Color c)
     greenLight = c;
public Color getRedLight()
return redLight;
public Color getGreenLight()
return greenLight;
public Color getYellowLight()
return yellowLight;
public void paintComponent(Graphics page)
     final int C = 25;
     page.setColor(Color.blue);
     page.fillRect(C, C, 100, 250);
     page.setColor(greenLight);
     page.fillOval(C+10,C+5,80,80);
     page.setColor(yellowLight);
     page.fillOval(C+10,C+90,80,80);
     page.setColor(redLight);
     page.fillOval(C+10,C+170,80,80);
}Edited by: Zepang on Dec 4, 2008 4:24 PM
Edited by: Zepang on Dec 4, 2008 4:25 PM

I don't in general do GUI stuff. But I can see for sure that you're never telling the system that it needs to repaint when you change state. That's why it doesn't show up until you cause an external event causing it to repaint itself, such as resizing the frame or dragging another window across the window.

Java application problem

I am using JDK1.4 and working on Windows Xp.
I have written a code for application in java as follows:
import javax.swing.*;
public class sample
JPanel panel;
static JFrame frame;
JButton but;
public sample()
frame=new JFrame("frame");
panel=new JPanel();
frame.getContentPane().add(panel);
but=new JButton("click");
panel.add(but);
public static void main(String args[])
sample s=new sample();
frame.setSize(300,300);
frame.setVisible(true);
on executing program application window has appeared and it ran properly.
Then I closed that application window.But after that in command prompt window curser was just blinking and it was not allow to enter also.
I have tried pressing CTRL+C also.But situation in command prompt was same i.e curser in command prompt was just blinking.
Then I closed cmd window ;but one error has occured saying that cmd window can not close .
My friend has told me that she is also having windows xp and JDK1.4 ; ctrl+c is working properly in her command prompt.She has written the above same code in her computer and it executes properly.
Even though she has not written following statement:
"frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);"
when she exits from application window ,her cmd window gave same problem of only blinking curser.But when she press CTRL+C ; her command prompt starts responding by giving root.But my command prompt is not giving
positive responce to "ctrl+c" when I am exiting java application.
Is it possible to solve this problem without giving statement
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); ?
Why my command prompt is not responding to CTRL+c?
How can I tackle this problem ?
Is there any other key which can be used in command prompt of Windows Xp?

Is it possible to solve this problem without giving
statement
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
?this is because Swing have started some non-daemon helper threads for its internal purposes and the default close operation for frame is just HIDE_ON_CLOSE. So, the system will not exit because those non-daemon thread still not terminated.
What is the problems setting the default close operation to JFrame.EXIT_ON_CLOSE ?

Java Swing application problem in Windows vista

When we execute the Swing application in windows vista environment.
The look and feel of the swing components are displayed improperly.
Do we need to put any specific look and feel for windows vista environment or any specific hardware configuration is required to setup windows vista environment.
Please give some inputs to solve the problem.
We have tried with the following sample code to run in windows vista.
* Vista.java
* Created on December 5, 2006, 5:39 PM
public class Vista extends javax.swing.JFrame {
/** Creates new form Vista */
public Vista() {
initComponents();
pack();
/** 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() {
jButton1 = new javax.swing.JButton();
jToggleButton1 = new javax.swing.JToggleButton();
jPanel1 = new javax.swing.JPanel();
jCheckBox1 = new javax.swing.JCheckBox();
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
jTextField1 = new javax.swing.JTextField();
getContentPane().setLayout(null);
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("Button 1");
getContentPane().add(jButton1);
jButton1.setBounds(20, 20, 170, 30);
jToggleButton1.setText("Togle btn");
getContentPane().add(jToggleButton1);
jToggleButton1.setBounds(100, 80, 90, 20);
jPanel1.setLayout(null);
jCheckBox1.setText("jCheckBox1");
jCheckBox1.setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 0, 0, 0));
jCheckBox1.setMargin(new java.awt.Insets(0, 0, 0, 0));
jPanel1.add(jCheckBox1);
jCheckBox1.setBounds(10, 40, 130, 13);
getContentPane().add(jPanel1);
jPanel1.setBounds(10, 150, 200, 130);
jTextArea1.setColumns(20);
jTextArea1.setRows(5);
jScrollPane1.setViewportView(jTextArea1);
getContentPane().add(jScrollPane1);
jScrollPane1.setBounds(210, 150, 164, 94);
jTextField1.setText("jTextField1");
getContentPane().add(jTextField1);
jTextField1.setBounds(240, 30, 140, 30);
pack();
}// </editor-fold>//GEN-END:initComponents
* @param args the command line arguments
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Vista().setVisible(true);
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton jButton1;
private javax.swing.JCheckBox jCheckBox1;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextArea jTextArea1;
private javax.swing.JTextField jTextField1;
private javax.swing.JToggleButton jToggleButton1;
// End of variables declaration//GEN-END:variables
}

When we execute the Swing application in windows
vista environment.
The look and feel of the swing components are
displayed improperly.Improperly means what? You must be aware that Vista's native L&F certainly isn't supported yet.

JFrames and Java3D simple problem

Hi ive created a program using jframes in Java and im wanting to move it over to java 3d but im having problems. Ive litterally just looked at java 3d so my knowledge is limited. All i want is to set up my canvas so that i have a Jframe panel on the right and a 3d ball on the left. Here's my failed attempt......
import com.sun.j3d.utils.geometry.*;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.image.*;//imports image functions
import javax.media.j3d.*;
import javax.vecmath.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.awt.*;
public class Prog extends JFrame
    private Canvas3D canvas;
    private SimpleUniverse universe = new SimpleUniverse(); // Create the universe
    private BranchGroup group = new BranchGroup(); // Create a structure to contain objects
    private Bounds bounds;
    public Prog()
        super("Program");
        GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
        canvas = new Canvas3D(config);
        //getContentPane().setLayout( new BorderLayout( ) );
        //getContentPane().add(canvas, "Center");
        Container c = getContentPane();
        setSize(600,400);
        c.setLayout(new BorderLayout( ));
        JPanel leftPanel = new JPanel( );
        leftPanel.setBackground(Color.BLACK);
        c.add(leftPanel, BorderLayout.CENTER);
        c.setLayout(new BorderLayout( ));
        JPanel rightPanel = new JPanel( );
        rightPanel.setBackground(Color.GRAY);
        c.add(rightPanel, BorderLayout.EAST);
        JButton goButton = new JButton(" Go ");
        goButton.setBackground(Color.RED);
        rightPanel.add(goButton);
     Light();//Creates A Light Source
     // Create a ball and add it to the group of objects
     Sphere sphere = new Sphere(0.5f);
     group.addChild(sphere);
     // look towards the ball
     universe.getViewingPlatform().setNominalViewingTransform();
     // add the group of objects to the Universe
     universe.addBranchGraph(group);
    public void Light()
        // Create a white light that shines for 100m from the origin
        Color3f light1Color = new Color3f(1.8f, 1.8f, 1.8f);
     BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
        Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f);
     DirectionalLight light1 = new DirectionalLight(light1Color, light1Direction);
        light1.setInfluencingBounds(bounds);
     group.addChild(light1);
    public static void main(String[] args)
     Prog frame = new Prog();
     frame.setVisible(true);
}It Compiles but the 3d ball and the Jframe gui are in different windows but i want them in the same window but i duno how ?

Hi tesla66 I'm sorry if I didn't correct your code, but drop some new code trying to solve the problem. I've used the cube instead the sphere because it's easier to see is rotating but just change "new ColorCube(0.4f)" with " new Sphere( 0.4f )". I wrote even some coments tought they're helpful. Tell me if I solved the problem
import java.awt.*;
import javax.swing.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.j3d.utils.geometry.*;
public class JFrameAndCanvas3D extends JFrame
     private Canvas3D canvas3D;
     public static void main(String[] args)
        new JFrameAndCanvas3D();
     public JFrameAndCanvas3D()
          initialize();
    public BranchGroup createSceneGraph()
        BranchGroup objRoot = new BranchGroup(); //root
        // Creates a bounds for lights and interpolator
        BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
        //Ambient light
        Color3f ambientColour = new Color3f(0.2f, 0.2f, 0.2f);
        AmbientLight ambientLight = new AmbientLight(ambientColour);
        ambientLight.setInfluencingBounds(bounds);
        objRoot.addChild(ambientLight);
        ///Creates a group for transforms
        TransformGroup objMove = new TransformGroup();
        //You must set the capability bit to allow to write transform on the object
        objMove.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        //Adds a color cube
        objMove.addChild(new ColorCube(0.4));
        //Creates a timer
        Alpha rotationAlpha = new Alpha(-1, //-1 = infinite loop
                                        4000 // rotation time in ms
        //creates a transform 3D based on Y axis roation
        Transform3D t3d = new Transform3D();
        t3d.rotY(Math.PI/2);
        //Creates an rotation interpolator with an alpha and a TransformGroup
        RotationInterpolator rotator = new RotationInterpolator(rotationAlpha, objMove);
        rotator.setTransformAxis(t3d);//setta l'asse di rotazione
        //sets a bounding region. withouth this scheduling bounds the interpolator won't work
        rotator.setSchedulingBounds(bounds);
        //add the interpolator to the group
        objMove.addChild(rotator);
        //Adding the group to the root
        objRoot.addChild(objMove);
        objRoot.compile();//improve the performance
        return objRoot;
    public void initialize()
        setSize(800, 600);
        setLayout(new BorderLayout());
        GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();//default config
        canvas3D = new Canvas3D(config);
        canvas3D.setSize(400, 600);
        add(canvas3D, BorderLayout.WEST); //adding the canvas to the west side of the JFrame
        SimpleUniverse simpleU = new SimpleUniverse( canvas3D );
        JPanel controlPanel = new JPanel();
        controlPanel.setLayout(new BorderLayout());
        controlPanel.setSize(400, 600);
        JLabel label = new JLabel();
        label.setText("I'm the control Panel");
        controlPanel.add(label, BorderLayout.CENTER);
        add(controlPanel, BorderLayout.EAST);
        //Positioning the view
        TransformGroup viewingPlatformGroup = simpleU.getViewingPlatform().getViewPlatformTransform();
        Transform3D t3d = new Transform3D();
        t3d.setTranslation(new Vector3f(0, 0, 3)); //moving back from the cube--> +z
        viewingPlatformGroup.setTransform(t3d);
        canvas3D.getView().setBackClipDistance(300.0d); //sets the visible distance
        canvas3D.getView().setFrontClipDistance(0.1d);
        canvas3D.getView().setMinimumFrameCycleTime(20); //minimum time refresh
        canvas3D.getView().setTransparencySortingPolicy(View.TRANSPARENCY_SORT_GEOMETRY); //rendering order
        BranchGroup scene = createSceneGraph();
        simpleU.addBranchGraph(scene);
        setVisible(true);
}-->Davil

GetContentPane() problem

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