How to resize a JPanel within another JPanel

I have a JApplet that contains contains a JPanel which has several other components on the JPanel.
The JApplet is an image query front-end which can be used to find images based on a single geographic point, a geographic rectangle or a geographic point and a radius (in meters). I have a JComboBox that the user uses to select which type of query they would like to perform. To enter the query information, I have a separate JPanel that contains the query parameters.
For the single geographic point, it is just a simple row with JLabels and JTextFields for the latitude and longitude.
For the rectangle, it is essentially a 3x3 grid to handle the JLabels and JTextFileds for the latitude and longitude of the upper left and lower right corners.
For the geographic point and radius, I reuse the JPanel for the single geographic point and add a new row for the radius.
In my ChangeListener for the JComboBox, I first call parentPanel.remove (queryPanel) then call a method to create the specific queryPanel and call parentPanel.add (queryPanel). The only thing that happens when I change the JComboBox to a different query type is the portion of the queryPanel that was covered by the selection of the JComboBox never gets repainted and doesn't change to the new queryPanel.
I wish I could provide code examples, but the computer that I am developing on is not on the Internet and it is extremely difficult to get anything off of it to put out on the Internet.
Hopefully, someone can help me figure out what is going on and why my parentPanel is not updating to reflect the new queryPanel.

GoDonkeys wrote:
Sorry, but what is the EDT?Please start here: [Concurrency in Swing|http://java.sun.com/docs/books/tutorial/uiswing/concurrency/index.html]

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Set Location of JPanel in another JPanel

Hello, i want to set the location of a JPanel in another JPanel.
This is my code:
* To change this template, choose Tools | Templates
* and open the template in the editor.
package nemo;
* @author Administrator
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
public class BackgroundImage extends JFrame
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        ImageIcon iconDrinken;
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}When i execute this i get this:
[http://img208.imageshack.us/img208/738/nowml5.jpg]
And i want the image in the first white box from the left.
But how to do it???
I've tried .setLocation and .setBounds
Edited by: Sven.nl on Apr 17, 2008 2:42 AM
Edited by: Sven.nl on Apr 17, 2008 2:43 AM

I already found it. Thanks anyway.
                JPanel panelDrinks = new JPanel() {
                    protected void paintComponent(Graphics g) {
                        g.drawImage(iconDrinken.getImage(), 100, 200, 200, 215, null);
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                  Edited by: Sven.nl on Apr 17, 2008 3:05 AM

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How can i use an inner Jpanel in another JPanel

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I'm sorry it's my bad that i have forgotten to add the innerPanel to mainPannel (But of course i tried it in the original code :) ). Now i made the changes you suggested but there are still problems.
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Adding a jPanel to another jPanel help

I have a class NavigationButtonsClass which has the navigationalPanel which in turn has buttons back, next ... etc.
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Thanks.

Modify ur NavigationButtonsClass like,
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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
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public static void main(String[] arg) {
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PanelLeft() {
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How to load swf files within another SWF and still maintain actionscript

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I would just like to say thanks in advance because everyone
on here is so helpful!

you can load an as2 file into an as3 file (using the loader
class) and the actionscript will work in both.

How to call swf file within another swf file using xml

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This is the AS3 forum and your posting involves AS2 code. You should repost in the AS2 forum...
http://forums.adobe.com/community/flash/flash_actionscript
Aside from that, your problem might lie in the following lines...
_root.createEmptyMovieClip("sub_container1", 1);
loadMovie(sub_SWFPath[1].attributes.url, "sub_container1");
You create the new movieclip, sub_container1, in the _root, but you do not assign the loadMovie to load into that same movieclip (unless you have a _lockroot = true assigned in your sub-swf). In any case, you should repost in the AS2 forum to pursue resolution.

How to show VI frontpanels within another VI frontpanel

Following problem:
I want to display and operate the frontpanel of abc.vi within a defined area
of the frontpanel of xyz.vi, without having to show two seperate and
independent VI panels.
Two possible ways:
1. Is there something like a frontpanel container, which I can insert into
xyz.vi and redirect the abc.vi panel (with input and output) to this
container ?
2. Can I create and add frontpanel objects programmatically in xyz.vi,
controlled by abc.vi (maybe with VI server etc. etc.)
I would be glad to hear from you
Oliver Friedrich
TZ Mikroelektronik

Nope, neither.
However, what you can do is make your sub-VI appear without title or scroll
bars and programmatically set the position of the sub-VI so that it appears
to be embedded in the correct region of the calling VI's panel. This
illusion will be quite convincing unless the user does something
inconsiderate like moving or rearranging the windows. The "embedded" sub-VI
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then you can't use the other VI while it's open. You can always keep making
the VI topmost by repeatedly calling the relevant function, but this will be
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There is a package of Windows utilities- search NI for "lvwutil32.zip". This
has a function that does an OS call to make the window topmost, so the OS
keeps it there without you having to bodge it. Under 5.x I was never able to
get this to work although no error was generated- you may have more luck.
Alternatively, do you actually need to be able to scan a directory for many
arbitrary "plugins" and call a user defined one as you seem to imply? If
not, you can make a tab control in the area you want the VIs to appear and
copy all your front panels to different tabs. This assumes Labview6. You can
then select the required tab programmatically when that VI is called. If the
sub-VI is to work in parallel and you need display updates before it
returns, modify all the sub-VIs to check to see if they are being called
from the top level or not, and if not to get a reference to the top level
VI's panel and use VI Server to allow the sub-VIs to interact with the front
panel copy that is visible at the top level. If all your controls are
uniquely labelled you could even make a generic set of functions, the first
of which you run at the start of a sub-VI to check if it's top level and get
a reference to the top level caller if not, and the second to periodically
synchronise all the controls and indicators of the sub-VI with those of the
relevant part of the top level VI panel. This is a trivial task. To ensure
there is no duplication in control names, if you take this approach you'll
have to relabel all the controls and indicators of the subVIs to include the
VI name. So "directory" becomes "SubVI1.directory" for example. You can keep
the word "directory" on the front panel by hiding the label and showing the
caption- the invisible label names the control and is used internally, and
the visible caption is just for cosmetics and can read whatever you like.
Oliver Friedrich wrote in message
news:[email protected]...
> Following problem:
>
> I want to display and operate the frontpanel of abc.vi within a defined
area
> of the frontpanel of xyz.vi, without having to show two seperate and
> independent VI panels.
>
> Two possible ways:
>
> 1. Is there something like a frontpanel container, which I can insert into
> xyz.vi and redirect the abc.vi panel (with input and output) to this
> container ?
>
> 2. Can I create and add frontpanel objects programmatically in xyz.vi,
> controlled by abc.vi (maybe with VI server etc. etc.)
>
> I would be glad to hear from you
>
> Oliver Friedrich
>
> TZ Mikroelektronik
>
>

How to place a JPanel at the center of another JPanel?

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import java.awt.*;
import javax.swing.*;
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Hello, I'm a newbie and I need help on how to execute procedures from within another procedure. The procedure that I call from within the procedure have return values that I want to check.
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PLS-00103: Encountered the symbol "USER_GET_FORUM_INFO" when expecting one of the following::= . ( @ % ; immediate
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PLS-00222: no function with name 'USER_GET_FORUM_INFO' exists in this scope
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Below is all the code. I'm using Oracle 9i on RedHat Linux 7.3.
================================================================================
CREATE OR REPLACE PROCEDURE user_forum_requestsaccess (
p_forumid IN NUMBER,
p_requestmessage IN VARCHAR2
AS
var_forumid NUMBER;
var_forum_exists NUMBER;
var_forum_access NUMBER;
request_exists NUMBER;
var_forumname VARCHAR2(30);
FORUM_DOESNT_EXIST EXCEPTION;
FORUM_USER_HAS_ACCESS EXCEPTION;
FORUM_REQUEST_EXIST EXCEPTION;
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COMMIT;
END IF;
EXCEPTION
WHEN
FORUM_DOESNT_EXIST
THEN RAISE_APPLICATION_ERROR(-20003,'Forum doesnt exist.');
WHEN
FORUM_USER_HAS_ACCESS
THEN RAISE_APPLICATION_ERROR(-20004,'User already have access to this forum.');
WHEN
FORUM_REQUEST_EXIST
THEN RAISE_APPLICATION_ERROR(-20005,'A request to this forum already exist.');
END;
GRANT EXECUTE ON user_forum_requestsaccess TO forum_user;
================================================================================
Regards Goran

you don't have to use execute when you want to execute a procedure (only on sql*plus, you would use it)
just give the name of the funtion
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/

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dragging = false;
public void mouseDragged(MouseEvent e)
if(dragging)
Rectangle r = selectedJPanel.getBounds();
r.x = e.getX() - offsetP.x;
r.y = e.getY() - offsetP.y;
selectedJPanel.setBounds(r.x, r.y, r.width, r.height);
//determineCenterOfComponents();
repaint();
private void addLabels()
label1 = new JLabel("Label 1");
label2 = new JLabel("Label 2");
label3 = new JLabel("Label 3");
label4 = new JLabel("Label 4");
labels = new JLabel[] {
label1, label2, label3, label4
JLabel jl = new JLabel("This is resizeable JPanel at Runtime");
jl.setBackground(Color.green);
jl.setOpaque(true);
          jl.setFont(new Font("Helvetica", Font.BOLD, 18));
JPanel jp = new JPanel();
jp.setLayout(new BorderLayout());
panels = new JPanel[]{jp};
          jp.setBorder(new LineBorder(Color.black, 3, false));
jp.setPreferredSize(new Dimension(400,200));
jp.add(jl, BorderLayout.NORTH);
for(int i = 0; i < labels.length; i++)
labels[i].setHorizontalAlignment(SwingConstants.CENTER);
labels[i].setBorder(BorderFactory.createEtchedBorder());
jp.add(labels[i], BorderLayout.CENTER);
jp.setBounds(100, 100, 400,200);
add(jp);

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.MouseInputAdapter;
public class Resizing extends JPanel {
    public Resizing() {
        super(null);
        addPanel();
        PanelControlAdapter control = new PanelControlAdapter(this);
        addMouseListener(control);
        addMouseMotionListener(control);
    private void addPanel() {
        JLabel jl = new JLabel("This is resizeable JPanel at Runtime");
        jl.setBackground(Color.green);
        jl.setOpaque(true);
        jl.setFont(new Font("Helvetica", Font.BOLD, 18));
        JPanel jp = new JPanel();
        jp.setLayout(new BorderLayout());
        jp.setBorder(new LineBorder(Color.black, 3, false));
        jp.add(jl, BorderLayout.NORTH);
        jp.setBounds(50,50,400,200);
        add(jp);
    public static void main(String[] args) {
        JFrame f = new JFrame("Test");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new Resizing());
        f.setSize(500,400);
        f.setLocation(100,100);
        f.setVisible(true);
class PanelControlAdapter extends MouseInputAdapter {
    Resizing host;
    Component selectedComponent;
    LineBorder black;
    LineBorder green;
    Point offset = new Point();
    Point start = new Point();
    boolean dragging = false;
    boolean resizing = false;
    public PanelControlAdapter(Resizing r) {
        host = r;
        black = new LineBorder(Color.black, 3, false);
        green = new LineBorder(Color.green, 3, false);
    public void mouseMoved(MouseEvent e) {
        Point p = e.getPoint();
        boolean hovering = false;
        Component c = host.getComponent(0);
        Rectangle r = c.getBounds();
        if(r.contains(p)) {
            hovering = true;
            if(selectedComponent != c) {
                if(selectedComponent != null) // reset
                    ((JComponent)selectedComponent).setBorder(black);
                selectedComponent = c;
                ((JComponent)selectedComponent).setBorder(green);
            if(overBorder(p))
                setCursor(p);
            else if(selectedComponent.getCursor() != Cursor.getDefaultCursor())
                selectedComponent.setCursor(Cursor.getDefaultCursor());
        if(!hovering && selectedComponent != null) {
            ((JComponent)selectedComponent).setBorder(black);
            selectedComponent = null;
    private boolean overBorder(Point p) {
        Rectangle r = selectedComponent.getBounds();
        JComponent target = (JComponent)selectedComponent;
        Insets insets = target.getBorder().getBorderInsets(target);
        // Assume uniform border insets.
        r.grow(-insets.left, -insets.top);
        return !r.contains(p);
    private void setCursor(Point p) {
        JComponent target = (JComponent)selectedComponent;
        AbstractBorder border = (AbstractBorder)target.getBorder();
        Rectangle r = target.getBounds();
        Rectangle ir = border.getInteriorRectangle(target, r.x, r.y, r.width, r.height);
        int outcode = ir.outcode(p.x, p.y);
        Cursor cursor;
        switch(outcode) {
            case Rectangle.OUT_TOP:
                cursor = Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR);
                break;
            case Rectangle.OUT_TOP + Rectangle.OUT_LEFT:
                cursor = Cursor.getPredefinedCursor(Cursor.NW_RESIZE_CURSOR);
                break;
            case Rectangle.OUT_LEFT:
                cursor = Cursor.getPredefinedCursor(Cursor.W_RESIZE_CURSOR);
                break;
            case Rectangle.OUT_LEFT + Rectangle.OUT_BOTTOM:
                cursor = Cursor.getPredefinedCursor(Cursor.SW_RESIZE_CURSOR);
                break;
            case Rectangle.OUT_BOTTOM:
                cursor = Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR);
                break;
            case Rectangle.OUT_BOTTOM + Rectangle.OUT_RIGHT:
                cursor = Cursor.getPredefinedCursor(Cursor.SE_RESIZE_CURSOR);
                break;
            case Rectangle.OUT_RIGHT:
                cursor = Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR);
                break;
            case Rectangle.OUT_RIGHT + Rectangle.OUT_TOP:
                cursor = Cursor.getPredefinedCursor(Cursor.NE_RESIZE_CURSOR);
                break;
            default:
                cursor = Cursor.getDefaultCursor();
        selectedComponent.setCursor(cursor);
    public void mousePressed(MouseEvent e) {
        Point p = e.getPoint();
        if(selectedComponent != null) {
            Rectangle r = selectedComponent.getBounds();
            if(selectedComponent.getCursor() == Cursor.getDefaultCursor()) {
                offset.x = p.x - r.x;
                offset.y = p.y - r.y;
                dragging = true;
            } else {
                start = p;
                resizing = true;
    public void mouseReleased(MouseEvent e) {
        dragging = false;
        resizing = false;
    public void mouseDragged(MouseEvent e) {
        Point p = e.getPoint();
        if(dragging || resizing) {
            Rectangle r = selectedComponent.getBounds();
            if(dragging) {
                r.x = p.x - offset.x;
                r.y = p.y - offset.y;
                selectedComponent.setLocation(r.x, r.y);
            } else if(resizing) {
                int type = selectedComponent.getCursor().getType();
                switch(type) {
                    case Cursor.N_RESIZE_CURSOR:
                        r.height -= p.y - start.y;
                        r.y = p.y;
                        break;
                    case Cursor.NW_RESIZE_CURSOR:
                        r.width -= p.x - start.x;
                        r.x = p.x;
                        r.height -= p.y - start.y;
                        r.y = p.y;
                        break;
                    case Cursor.W_RESIZE_CURSOR:
                        r.width -= p.x - start.x;
                        r.x = p.x;
                        break;
                    case Cursor.SW_RESIZE_CURSOR:
                        r.width -= p.x - start.x;
                        r.x = p.x;
                        r.height += p.y - start.y;
                        break;
                    case Cursor.S_RESIZE_CURSOR:
                        r.height += p.y - start.y;
                        break;
                    case Cursor.SE_RESIZE_CURSOR:
                        r.width += p.x - start.x;
                        r.height += p.y - start.y;
                        break;
                    case Cursor.E_RESIZE_CURSOR:
                        r.width += p.x - start.x;
                        break;
                    case Cursor.NE_RESIZE_CURSOR:
                        r.width += p.x - start.x;
                        r.height -= p.y - start.y;
                        r.y = p.y;
                        break;
                    default:
                        System.out.println("Unexpected resize type: " + type);
                selectedComponent.setBounds(r.x, r.y, r.width, r.height);
                start = p;
}

Sizing a jlist within a jpanel

Hi,
I'm writing a jpanel tjhat contains a jlist object at its center. Now, when I place the jpanel within a JFrame the panel grows to eat all the available space (I can see this thanks to the border of the panel), while the JList remains at a very small size regarding the jpanel. I'd like to have the jlist to resize itself to occupy all the
jpanel size. The following is the code that shows it. Any idea about how to achieve this?
Thanks,
Luca
public class ListPanel extends JPanel{
    protected JList myList;
public AgletListPanel(){
        super();
        this.setLayout(new FlowLayout(FlowLayout.CENTER));
        this.listModel = new DefaultListModel();
        this.myList = new JList(this.listModel);
        this.myList.setBackground(Color.WHITE);
        this.myist.setForeground(Color.BLUE);
        this.myList.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        this.myList.setPreferredSize(getPreferredSize());
        this.add(new JScrollPane(this.myList));
        TitledBorder border = new TitledBorder("List"));
        border.setTitleColor(Color.BLUE);
        border.setTitleJustification(TitledBorder.CENTER);
        this.setBorder(border);
        this.setVisible(true);
    }

Thanks, using the borderlayout the panel now shows fine to me. However I removed the setPreferredSize line in order not ot have the jlist to use scrollbars even if empty.
By the way, can you explain why the FlowLayout did not work and the border layout did it?
Thanks.

How to pass/share components between different JPanels/Container

Dear Friends,
I know here a lot Java Guru, I met a problem below.
How can I pass components between different JPanels??
here, ListPanelMain.java is main,
When I click a tree node in splitPane, I can see all its children on the right splitpane, but I hope they can be seen on another Panel called "ListRightPane.java"
How to do it??
Why cannot pass??
[1]. main Program:
package swing.com.test.test;
import javax.swing.JFrame;
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import java.io.Serializable;
import swing.com.test.test.ListPanel;
import java.awt.GridLayout;
public class ListPanelMain implements java.io.Serializable{
     private JFrame frame;
     * Launch the application
     * @param args
     public static void main(String args[]) {
          try {
               ListPanelMain window = new ListPanelMain();
               window.frame.setVisible(true);
          } catch (Exception e) {
               e.printStackTrace();
     * Create the application
     public ListPanelMain() {
          initialize();
     * Initialize the contents of the frame
     private void initialize() {
          frame = new JFrame("FileTreePanelMain");
          frame.setBounds(100, 100, 900, 675);
     //     FieTreePanelComm      ftreecomm                = new      FieTreePanelComm();
          ListPanel                ftree                     = new      ListPanel("C:\\");
//          ListAllFile           ftree                     = new      ListAllFile("C:\\");
     //     FileTreePanelText      fileTreePanelText      = new      FileTreePanelText(ftreecomm);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          final JPanel panel = new JPanel();
          panel.setLayout(new GridLayout(0, 2));
          frame.getContentPane().add(panel, BorderLayout.CENTER);
     //     final JSplitPane splitPane = new JSplitPane();
     //     frame.getContentPane().add(splitPane, BorderLayout.CENTER);
     //     splitPane.setLeftComponent(ftree);
          panel.add(ftree);
          final ListRightPanel listRightPanel = new ListRightPanel(ftree);
          //splitPane.setRightComponent(listRightPanel);
          panel.add(listRightPanel);
     frame.addWindowListener(new WindowAdapter() {
     public void windowClosing(WindowEvent e) {
     System.exit(0);
     frame.pack();
     frame.setVisible(true);
[2]. Program 2:
package swing.com.test.test;
//File System Tree
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.io.File;
import java.util.Iterator;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.JPanel;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListPanel extends JPanel implements Serializable{
protected JTree fileTree;
private FileSystemModel fileSystemModel;
private JTextArea ltextArea = new JTextArea();
protected JTextArea fileDetailsTextArea = new JTextArea();
private String str = "";
     public String getlTextArea() {
               //textArea.getText();
               return str;
     public String setlTextArea(String ta) {
               ltextArea.setText(ta);
               str = ta;
               return str;
public ListPanel(String directory) {
//super("JTree FileSystem Viewer");
               setLayout(new BorderLayout());
               final JPanel panel = new JPanel();
               panel.setLayout(new BorderLayout());
          add(panel, BorderLayout.CENTER);
fileDetailsTextArea.setEditable(false);
fileSystemModel = new FileSystemModel(new File(directory));
fileTree = new JTree(fileSystemModel);
fileTree.setEditable(true);
fileTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent event) {
System.out.println("1. What we save is: getlTextArea() =" + getlTextArea() );
File file = (File) fileTree.getLastSelectedPathComponent();
fileDetailsTextArea.setText(getFileDetails(file));
final ListRightPanel lrp = new ListRightPanel(this);
lrp.textArea.setText(getFileDetails(file));
setlTextArea(getFileDetails(file));
System.out.println("2. What we save is: getlTextArea() =" + getlTextArea() );
          final JSplitPane splitPane = new JSplitPane();
          panel.add(splitPane, BorderLayout.CENTER);
          final JPanel panel_1 = new JPanel();
          splitPane.setLeftComponent(panel_1);
          panel_1.add(new JScrollPane(fileTree));
          final JPanel panel_2 = new JPanel();
          splitPane.setRightComponent(panel_2);
          panel_2.add(new JScrollPane(fileDetailsTextArea));
setVisible(true);
private String getFileDetails(File file) {
if (file == null)
return "";
StringBuffer buffer = new StringBuffer();
if (file.listFiles()!=null){
     for (int i=0; i< file.listFiles().length; i++){
     buffer.append(((file.listFiles())) + "\n");
     System.out.println("List all files");
return buffer.toString();
public static void main(String args[]) {
new ListPanel("c:\\");
class FileSystemModel implements TreeModel {
private File root;
private Vector listeners = new Vector();
public FileSystemModel(File rootDirectory) {
root = rootDirectory;
public Object getRoot() {
return root;
public Object getChild(Object parent, int index) {
File directory = (File) parent;
String[] children = directory.list();
return new TreeFile(directory, children[index]);
public int getChildCount(Object parent) {
File file = (File) parent;
if (file.isDirectory()) {
String[] fileList = file.list();
if (fileList != null)
return file.list().length;
return 0;
public boolean isLeaf(Object node) {
File file = (File) node;
return file.isFile();
public int getIndexOfChild(Object parent, Object child) {
File directory = (File) parent;
File file = (File) child;
String[] children = directory.list();
for (int i = 0; i < children.length; i++) {
if (file.getName().equals(children[i])) {
return i;
return -1;
public void valueForPathChanged(TreePath path, Object value) {
File oldFile = (File) path.getLastPathComponent();
String fileParentPath = oldFile.getParent();
String newFileName = (String) value;
File targetFile = new File(fileParentPath, newFileName);
oldFile.renameTo(targetFile);
File parent = new File(fileParentPath);
int[] changedChildrenIndices = { getIndexOfChild(parent, targetFile) };
Object[] changedChildren = { targetFile };
fireTreeNodesChanged(path.getParentPath(), changedChildrenIndices, changedChildren);
private void fireTreeNodesChanged(TreePath parentPath, int[] indices, Object[] children) {
TreeModelEvent event = new TreeModelEvent(this, parentPath, indices, children);
Iterator iterator = listeners.iterator();
TreeModelListener listener = null;
while (iterator.hasNext()) {
listener = (TreeModelListener) iterator.next();
listener.treeNodesChanged(event);
public void addTreeModelListener(TreeModelListener listener) {
listeners.add(listener);
public void removeTreeModelListener(TreeModelListener listener) {
listeners.remove(listener);
private class TreeFile extends File {
public TreeFile(File parent, String child) {
super(parent, child);
public String toString() {
return getName();
[3]. Program 3:
package swing.com.test.test;
import java.awt.BorderLayout;
import java.io.File;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListRightPanel extends JPanel implements TreeSelectionListener, Serializable{
     protected JTextArea textArea;
//     protected ListAllFile laf;
private String str = "";
          public String getlTextArea() {
                    //textArea.getText();
                    return str;
          public String setlTextArea(String ta) {
                    str = ta;
                    return str;
     * Create the panel
     public ListRightPanel(ListPanel laff) {
          super();
          setLayout(new BorderLayout());
          final JPanel panel = new JPanel();
          panel.setLayout(new BorderLayout());
          add(panel, BorderLayout.CENTER);
          textArea = new JTextArea();
final String st = laff.getlTextArea();
System.out.println("####################################");
System.out.println("st=" + st);
     laff.fileTree.addTreeSelectionListener(new TreeSelectionListener() {
     public void valueChanged(TreeSelectionEvent event) {
     //laff.textArea.setText(getFileDetails(file));
          textArea.setText(getlTextArea());
     System.out.println("ListRightPanel Was Invoked from ListPanel!!getlTextArea() =" + getlTextArea() );
     System.out.println("st=" + st);
          panel.add(textArea, BorderLayout.CENTER);
     public void valueChanged(TreeSelectionEvent e){};
It is runnable program, just compile and run it in Console is ok,
Regards
Sunny

Thnaks, code post again, see
[1]. package swing.com.test.test;
import javax.swing.JFrame;
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import java.io.Serializable;
import swing.com.test.test.ListPanel;
import java.awt.GridLayout;
public class ListPanelMain implements java.io.Serializable{
     private JFrame frame;
      * Launch the application
      * @param args
     public static void main(String args[]) {
          try {
               ListPanelMain window = new ListPanelMain();
               window.frame.setVisible(true);
          } catch (Exception e) {
               e.printStackTrace();
      * Create the application
     public ListPanelMain() {
          initialize();
      * Initialize the contents of the frame
     private void initialize() {
          frame = new JFrame("FileTreePanelMain");
          frame.setBounds(100, 100, 900, 675);
     //     FieTreePanelComm      ftreecomm                = new      FieTreePanelComm();
          ListPanel                ftree                     = new      ListPanel("C:\\");
//          ListAllFile           ftree                     = new      ListAllFile("C:\\");
     //     FileTreePanelText      fileTreePanelText      = new      FileTreePanelText(ftreecomm);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          final JPanel panel = new JPanel();
          panel.setLayout(new GridLayout(0, 2));
          frame.getContentPane().add(panel, BorderLayout.CENTER);
     //     final JSplitPane splitPane = new JSplitPane();
     //     frame.getContentPane().add(splitPane, BorderLayout.CENTER);
     //     splitPane.setLeftComponent(ftree);
          panel.add(ftree);
          final ListRightPanel listRightPanel = new ListRightPanel(ftree);
          //splitPane.setRightComponent(listRightPanel);
          panel.add(listRightPanel);
            frame.addWindowListener(new WindowAdapter() {
                 public void windowClosing(WindowEvent e) {
                     System.exit(0);
             frame.pack();
             frame.setVisible(true);
}[2] Program 2
package swing.com.test.test;
//File System Tree
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.io.File;
import java.util.Iterator;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.JPanel;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListPanel extends JPanel implements Serializable{
protected JTree fileTree;
private FileSystemModel fileSystemModel;
private JTextArea ltextArea = new JTextArea();
protected JTextArea fileDetailsTextArea = new JTextArea();
private String str = "";
     public String getlTextArea() {
               //textArea.getText();
                  return str;
     public String setlTextArea(String ta) {
               ltextArea.setText(ta);
               str = ta;
                  return str;
public ListPanel(String directory) {
    //super("JTree FileSystem Viewer");
               setLayout(new BorderLayout());
               final JPanel panel = new JPanel();
               panel.setLayout(new BorderLayout());
              add(panel, BorderLayout.CENTER);
    fileDetailsTextArea.setEditable(false);
    fileSystemModel = new FileSystemModel(new File(directory));
    fileTree = new JTree(fileSystemModel);
    fileTree.setEditable(true);
    fileTree.addTreeSelectionListener(new TreeSelectionListener() {
      public void valueChanged(TreeSelectionEvent event) {
        System.out.println("1. What we save is: getlTextArea() =" + getlTextArea() );
        File file = (File) fileTree.getLastSelectedPathComponent();
        fileDetailsTextArea.setText(getFileDetails(file));
        final ListRightPanel lrp = new ListRightPanel(this);
        lrp.textArea.setText(getFileDetails(file));
        setlTextArea(getFileDetails(file));
        System.out.println("2. What we save is: getlTextArea() =" + getlTextArea() );
          final JSplitPane splitPane = new JSplitPane();
          panel.add(splitPane, BorderLayout.CENTER);
          final JPanel panel_1 = new JPanel();
          splitPane.setLeftComponent(panel_1);
          panel_1.add(new JScrollPane(fileTree));
          final JPanel panel_2 = new JPanel();
          splitPane.setRightComponent(panel_2);
          panel_2.add(new JScrollPane(fileDetailsTextArea));
    setVisible(true);
private String getFileDetails(File file) {
    if (file == null)
      return "";
    StringBuffer buffer = new StringBuffer();
    if (file.listFiles()!=null){
         for (int i=0; i< file.listFiles().length; i++){
         buffer.append(((file.listFiles())) + "\n");
     System.out.println("List all files");
return buffer.toString();
public static void main(String args[]) {
new ListPanel("c:\\");
class FileSystemModel implements TreeModel {
private File root;
private Vector listeners = new Vector();
public FileSystemModel(File rootDirectory) {
root = rootDirectory;
public Object getRoot() {
return root;
public Object getChild(Object parent, int index) {
File directory = (File) parent;
String[] children = directory.list();
return new TreeFile(directory, children[index]);
public int getChildCount(Object parent) {
File file = (File) parent;
if (file.isDirectory()) {
String[] fileList = file.list();
if (fileList != null)
return file.list().length;
return 0;
public boolean isLeaf(Object node) {
File file = (File) node;
return file.isFile();
public int getIndexOfChild(Object parent, Object child) {
File directory = (File) parent;
File file = (File) child;
String[] children = directory.list();
for (int i = 0; i < children.length; i++) {
if (file.getName().equals(children[i])) {
return i;
return -1;
public void valueForPathChanged(TreePath path, Object value) {
File oldFile = (File) path.getLastPathComponent();
String fileParentPath = oldFile.getParent();
String newFileName = (String) value;
File targetFile = new File(fileParentPath, newFileName);
oldFile.renameTo(targetFile);
File parent = new File(fileParentPath);
int[] changedChildrenIndices = { getIndexOfChild(parent, targetFile) };
Object[] changedChildren = { targetFile };
fireTreeNodesChanged(path.getParentPath(), changedChildrenIndices, changedChildren);
private void fireTreeNodesChanged(TreePath parentPath, int[] indices, Object[] children) {
TreeModelEvent event = new TreeModelEvent(this, parentPath, indices, children);
Iterator iterator = listeners.iterator();
TreeModelListener listener = null;
while (iterator.hasNext()) {
listener = (TreeModelListener) iterator.next();
listener.treeNodesChanged(event);
public void addTreeModelListener(TreeModelListener listener) {
listeners.add(listener);
public void removeTreeModelListener(TreeModelListener listener) {
listeners.remove(listener);
private class TreeFile extends File {
public TreeFile(File parent, String child) {
super(parent, child);
public String toString() {
return getName();
[3] Program 3:
package swing.com.test.test;
import java.awt.BorderLayout;
import java.io.File;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListRightPanel extends JPanel implements TreeSelectionListener, Serializable{
     protected JTextArea textArea;
//     protected ListAllFile laf;
    private String str = "";
          public String getlTextArea() {
                    //textArea.getText();
                       return str;
          public String setlTextArea(String ta) {
                    str = ta;
                       return str;
      * Create the panel
     public ListRightPanel(ListPanel laff) {
          super();
          setLayout(new BorderLayout());
          final JPanel panel = new JPanel();
          panel.setLayout(new BorderLayout());
          add(panel, BorderLayout.CENTER);
          textArea = new JTextArea();
        final String st = laff.getlTextArea();
        System.out.println("####################################");
        System.out.println("st=" + st);
         laff.fileTree.addTreeSelectionListener(new TreeSelectionListener() {
             public void valueChanged(TreeSelectionEvent event) {
               //laff.textArea.setText(getFileDetails(file));
                  textArea.setText(getlTextArea());
                 System.out.println("ListRightPanel Was Invoked from ListPanel!!getlTextArea() =" + getlTextArea() );
                 System.out.println("st=" + st);
          panel.add(textArea, BorderLayout.CENTER);
       public void valueChanged(TreeSelectionEvent e){};
}You can try this one, thanks again
sunny

JTable in JPanel last Column resize clips JTable doesnt repaint JPanel

I have a JTable in a JPanel, when I drag the last column of the JTableHeader (u can see the column resizing as the text of the Table HeaderColumn moves with the drag) the JTable is outside the JPanel. Only when u click on another component and then click back on the JTableHeader does it repaint.
I have tried jPanel.revalidate(); in the mouseDragged event of MouseMotionListener on the JTableHeader and all manner or repaints and fireTableStructureChanged. But I dont understand the order of events.
The last bug to fix!!!
NB I dont want to use scrollpane as its not necessary and as many tables are synchronized with one table it makes repaints less smooth
Thanks Paul

Well, I didn't find an answer but I did find a solution.
The JPanel is the problem. I use it to help with layout which is not obvious in this example.
As you can see in the code the JTable is placed in a JScrollPane which is place in a JPanel which is placed in a JTabbedPane.
If I use Box instead of JPanel the JTable in the JScrollPane in the Box in the TabbedPane in the JFrame resizes correclty.
So although JPanel is resizable with setSize it does not get resized when it's JFrame gets resized.
I would still like to know why?
////////KBS
JTabbedPane myTP = new JTabbedPane();
Box myOne = Box.createHorizontalBox();
Box myTwo = Box.createHorizontalBox();
myOne.add(pane);
myTP.add("One", myOne);
myTP.add("Two", myTwo);
////////KBS

How to resize a JPanel within another JPanel

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