Call OCX in Swing Application

Hi all,
I am writing a Swing application and in several frames I need to call OCX modules. Can anyone kindly let me know how to do this ? Will greatly appreicate it if examples are available for reference. Thanks a lot.
C.K.

Hi,
get and try java-com bridge njawin (njawin11.zip) at http://www.simtel.net/pub/winnt/java/. Sources for examples are packed with binaries in proper JARs.
Vitally

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How to call Ocx in swing Component

Hi i want to play Flash4 file xxx.swf in swing Component
JMF Api Supports upto Flash2 only i downloadled Flash4 player which is a ocx file .how can i integrate this ocx in swing Component
help me please
regards
Mahesh.B

I have used the tool JacoZoom by InfoZoom (http://www.infozoom.de).
The tool can create JCWs (java callable wrappers) for COM and ActiveX objects.
If they are visual, you can create and display them within your Java app
either as AWT or in Swing.
In general, JacoZoom is the best tool I have found so far, it is my
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Sylvia

Error calling WSDL Service in Swing application.

I'm having the following error when calling a web service in a Swing Application.
getUserInfo is defined and properly deployed. I tried several time to recreate WSDL cache and auto generated code, but nothing changed.
Exception occurred during event dispatching:
java.lang.Error: java.lang.reflect.InvocationTargetException
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
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Caused by: java.lang.Error: Undefined operation name getUserInfos
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    at com.sun.xml.ws.client.WSServiceDelegate.getPort(WSServiceDelegate.java:323)
    at com.sun.xml.ws.client.WSServiceDelegate.getPort(WSServiceDelegate.java:305)
    at javax.xml.ws.Service.getPort(Unknown Source)
    at com.up4b.mercury.services.ServerManagerService.getServerManagerPort(ServerManagerService.java:56)
    at com.up4b.mercury.client.MercuryClientLoginBox.checkUser(MercuryClientLoginBox.java:139)
    ... 93 more

OK.
So here is an inside view of what I'm doing:
Service is coded in a J2EE Web Application like this:
     * Web service operation
    @WebMethod(operationName = "userInfos")
    public Musers userInfos(@WebParam(name = "userId")
    Long userId) {
        return serverManager.getUserInfos(userId);
    }And in the client (Swing application generated by Netbeans) the code is:
try { // Call Web Service Operation
                    com.up4b.mercury.services.CampaignManagerService service = new com.up4b.mercury.services.CampaignManagerService();
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                        i++;
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Is there a way that I can call a Swing application

Hi all,
Is there a way that I can call a Swing application from html page.
fox example when user clicks on the url in html will activate a swing local application
thanks

Assuming the local swing application is running, and you have an applet in the browser that has permissions to communicate with a server other than the originating server, you could use RMI or a regular socket connection.
Due to the obvious security issues to letting javascript or an applet free access to the local machine, this is not something that a browser really supports.

How to Call Crystal Reports from Swing Application

Hi All,
I have a requirement for calling Crystal Report from Swing Application. Please let me know how can I do that, and also provide the Source code for calling the crystal report.
Thanks in advance.
Chandra

hi
this is the code that i am using in my application which is similar to urs. but i am working with CR XI so make all the neccessary changes.
    import java.awt.*;
    import javax.swing.*;
    import com.crystaldecisions.ReportViewer.*;
    import com.crystaldecisions.reports.sdk.*;
    import com.crystaldecisions.sdk.occa.report.reportsource.*;
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        public static void createAndShowGUI()
            try
                //Make sure we have nice window decorations.
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                //Create and set up the window.
                JFrame frame = new JFrame("HelloWorldSwing");
                frame.setTitle( "Testing Reports");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               ReportViewerBean viewer = new ReportViewerBean();
                viewer.init( new String[0], null, null, null);
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                IReportSource rptSource = rpt.getReportSource();
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                frame.getContentPane().add( viewer, BorderLayout.CENTER );
                frame.setSize( 700, 500 );
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                viewer.start();
            catch ( Exception exception )
                System.out.println( exception.toString() );
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            javax.swing.SwingUtilities.invokeLater(new Runnable()
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                    createAndShowGUI();
   there are 23 jar files that u need to import into ur package. but remember that ReportViewerBean should be the first jar file in the list & it should be followed by jrcerom.jar
specify the key in the CRConfig.xml file (which also has to be imported in the package)
u can find these jar files in the common objects folder in your program files.
hope it helps. best of luck

How to give Common Background color for all JPanels in My Swing application

Hi All,
I am developing a swing application using The Swing Application Framework(SAF)(JSR 296). I this application i have multiple JPanel's embedded in a JTabbedPane. In this way i have three JTabbedPane embedded in a JFrame.
Now is there any way to set a common background color for the all the JPanel's available in the application??
I have tried using UIManager.put("Panel.background",new Color.PINK);. But it did not work.
Also let me know if SAF has some inbuilt method or way to do this.
Your inputs are valuable.
Thanks in Advance,
Nishanth.C

It is not the fault of NetBeans' GUI builder, JPanels are opaque by default, I mean whether you use Netbeans or not.Thank you!
I stand corrected (which is short for +"I jumped red-eyed on my feet and rushed to create an SSCCE to demonstrate that JPanels are... mmm... oh well, they are opaque by default... ;-[]"+)
NetBeans's definitely innocent then, and indeed using it would be an advantage (ctrl-click all JPanels in a form and edit the common opaque property to false) over manually coding
To handle this it would be better idea to make a subclass of JPanel and override isOpaque() to return false. Then use this 'Trasparent Panel' for all the panels where ever transparency is required.I beg to differ. From a design standpoint, I'd find it terrible (in the pejorative sense of the word) to design a subclass to inconsistently override a getter whereas the standard API already exposes the property (both get and set) for what it's meant: specify whether the panel is opaque.
Leveraging this subclass would mean changing all lines where a would-be-transparent JPanel is currently instantiated, and instantiate the subclass instead.
If you're editing all such lines anyway, you might as well change the explicit new JPanel() for a call to a factory method createTransparentJPanel(); this latter could, at the programmer's discretion, implement transparency whichever way makes the programmer's life easier (subclass if he pleases, although that makes me shudder, or simply call thePanel.setOpaque(false) before returning the panel). That way the "transparency" code is centralized in a single easy to maintain location.
I had to read the code for that latter's UI classes to find out the keys to use (+Panel.background+, Label.foreground, etc.), as I happened to not find this info in an authoritative document - I see that you seem to know thoses keys, may I ask you where you got them from?
One of best utilities I got from this forum, written by camickr makes getting these keys and their values very easy. You can get it from his blog [(->link)|http://tips4java.wordpress.com/2008/10/09/uimanager-defaults/]
Definitely. I bit a pair of knucles off when discovered it monthes after cumbersomely traversing the BasicL&F code...
Still, it is a matter-of-fact approach (and this time I don't mean that to sound pejorative), that works if you can test the result for a given JDK version and L&F, but doesn't guarantee that these keys are there to stand - an observation, but not a specification.
Thanks TBM for highlighting this blog entry, that's the best keys list device I have found so far, but the questions still holds as to what specifies the keys.
Edited by: jduprez on Feb 15, 2010 10:07 AM

Can not launch swing application from Java Web Start 1.6.0_37

I have a dynamic generated jnlp file from a serlvet. When I used Java Web Start to start the swing application, it failed. The exception showed
com.sun.deploy.net.FailedDownloadException: Unable to load resource: http://xxxx.xx.com:9080/dilpipweb/Test-1.0-SNAPSHOT.jar
     at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
     at com.sun.javaws.LaunchDownload$DownloadTask.call(Unknown Source)
     at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
     at java.util.concurrent.FutureTask.run(Unknown Source)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
I used janela to validate the generated jnlp file. It was valid. I also checked the tomcat access log, it showed that the Test-1.0-SNAPSHOT.jar file was accessed correctly (with a 200 return code).
Can anyone help me what was the problem?
Thanks,

Hi.
I got a different problem. My Corba application works in JRE 1.6, but doesn't works in JRE 1.5.X. I got an unexpected error and my console shows:
getSubjectX500Principal NoSuchMethodError: java.lang NoSuchMethodError
#### Java Web Start Error:
#### null
Can you help me?

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.

Need Help to update the labels in the GUI syncronously - Swing application

Hello everyone,
I need some help regarding a swing application. I am not able to syncronously update the counters and labels that display on my Swing GUI as the application runs in the background. But when the running of application is completed, then the labels on the GUI are getting updated, But I want update the labels and counters on the GUI syncronously as the code executes... below I am giving the format of the code I have written..............
public class SwingApp extends JFrame{
        // here i have declared the label and component varibles like...
                  private JTextField startTextField;
       private JComboBox maxComboBox;
       private JTextField logTextField;
       private JTextField searchTextField;
       private JLabel imagesDownloaded1;
       private JLabel imagesDownloaded2;
       private JLabel imagesDidnotDownload1;
       private JLabel imagesDidnotDownload2;
                  private JButton startButton;
//now in the constructer.............
public Swing(){
//I used gridbaglayout and wrote the code for the GUI to appear....
startButton = new JButton("Start Downloading");
    startButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        try{
             actionSearch();   //actionSearch will contain all the code and the function calls of my application...........
        }catch(Exception e1){
             System.out.println(e1);
    constraints = new GridBagConstraints();
    constraints.gridwidth = GridBagConstraints.REMAINDER;
    constraints.insets = new Insets(5, 5, 5, 5);
    layout.setConstraints(startButton, constraints);
    searchPanel.add(startButton);
//update is a function which initiates a thread which updates the GUI. this function will be called to pass the required variables in the application
public void update(final int count_hits, final int counter_image_download1, final int didnot_download1) throws Exception{
     Thread thread = new Thread(new Runnable() {
         public void run() {
              System.out.println("entered into thread");
              System.out.println("the variable that has to be set is " + count_hits);
              server_hits_count.repaint(count_hits);
              server_hits_count.setText( " "+ Integer.toString(count_hits));
              imagesDownloaded2.setText(" " + Integer.toString(counter_image_download1));
              imagesDidnotDownload2.setText(" " + Integer.toString(didnot_download1));
              repaint();
     //this.update(count_hits);
     thread.start();
//Now in main............................
public static void main(String[] args){
Swing s = new Swing();
s.setVisible(true);
}//end of main
}//end of class SwingAbove I have given the skeleton code of my application........ Please tell me how to update the GUI syncronously...
Please its a bit urgent...............
Thank you very much in advance
chaitanya

First off, note that this question should have been posted in the Swing section.
GUI events run in a separate thread (the AWT / Event Dispatch Thread) than your program.
You should be invoking AWT/Swing events via SwingUtilities.invokeLater().
If for whatever reason you want to have the program thread wait for the event to process
you can use invokeAndWait().
http://java.sun.com/javase/6/docs/api/javax/swing/SwingUtilities.html

Is there any Open source Reporting Toll for using in swing application ?

Is there any reporting system like crystal report or any thing for report generation. Using JTable class it is so time taking job. I have downloaded Eclipse with crystal report embedded, and have created a report but can not integrate the report with JFrame with any menu item action. All the code i got releted to JSP. and few code get that are using
//Crystal Java Reporting Component (JRC) imports.
import com.crystaldecisions.reports.sdk.*;
import com.crystaldecisions.sdk.occa.report.lib.*;
//Java Imports.
import javax.swing.*;
public class JRCViewReport {
     private static final String REPORT_NAME = "JRCViewReport.rpt";
     public static void launchApplication() {
          try {
               //Open report.
               ReportClientDocument reportClientDoc = new ReportClientDocument();
               reportClientDoc.open(REPORT_NAME, 0);
               //Launch JFrame that contains the report viewer.
               new ReportViewerFrame(reportClientDoc);
          catch(ReportSDKException ex) {
               System.out.println(ex);
          catch(Exception ex) {
               System.out.println(ex);
     public static void main(String [] args) {
          //Event-dispatching thread to run Swing GUI. This is good practice for Swing applications
          //to help ensure that events are dispatched in a predicatable order.
          //For more information on using this method, refer to the SUN site below for more details:
          //http://java.sun.com/products/jfc/tsc/articles/threads/threads1.html
          SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                    //Hand-off to worker function to start application.
                    launchApplication();
}Also there is one file ReportViewerFrame.java
but the error is "*com.crystaldecisions.reports.sdk*" not found
Please help ..........................................................

I have already use Jasper Report. Thakns a lot for your suggestion. Now I think i have solved your problem...... View the code.. this code will not open the JasperViewer but from the background it will be printed and after calling the printing function you can save a data in the database ------------------------
JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
        Connection con = Database.getConnection(); // your database connection
        jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, con);
        for(int i=0;;i++) { //print all pages
            try{
                JRPrinterAWT.printPages(jasperPrint,i,i,false);
            }catch(Exception e) {
                break;
        }

Swing application with JavaHelp crashes outside Netbeans IDE.

Hi guys I have developed a small swing application in Netbeans IDE. I used the following code inside the IDE for JH.
public void createHelp()
       try {
               URL hsURL = new URL("jar:file:eDictionaryHelp.jar!/eDictionaryHelp/eDictionary.hs");
               hs = new HelpSet(null, hsURL);
       catch (Exception ee)
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        System.out.println("HelpSet "+ helpHS +" not found");
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But when I build the project and tried to run it from the .jar file in the PROJECT_HOME/dist/ the swing got displayed till this function was called. and then it simply crashed.
Investigating further and commenting out one line at a time and compiling I found out that whenever the hs = new HelpSet(null, hsURL); is encountered, the app crashes (it doesnt throw any error).
But as I said this is not the case when i run and compile inside the IDE. I only get this problem when running the app from outside the IDE.
I have tried all kinds of combinations of the URL .. for eg ( I am aware of Bug 4149782)
ClassLoader cl = this.getClass().getClassLoader();
try {
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.What can be the problem guys? Any suggestions?
Thanks!

Anyone has an answer on this?
I am facing the same problem.. I am using NetBeans 5.5
arijit_datta, do u have a solution for this problem already?
Thanks,
SK

Swing application eats CPU on resume after standby

My application contains a mix of regular Swing components and about 200 (small) custom components (JPanels) that draw themselves. The problem is that if put my laptop into Standby, then restart it, the application eats CPU. It goes from ~4% pre standby to ~48% after standby. Totally repeatable. There is only the main thread, the AWT thread and a couple timers firing: one to get data from a server and one to redraw the custom controls to make the control blink (calls repaint() to cue up a call to paintComponent()). I put timing code in the two timer driven threads and both are running fine. NOTE: each of the custom components is just a rectangle with a short text string in it. Think checkerboard with text. The background color is all that is being changed. It's basically a grid of alarm/status "lights".
I did some searching and only found a reference to a drawing bug that was fixed back in 1.4.x that had to do with WinXP and dual-headed computers.
Note that another simple Swing application I wrote (no custom controls), doesn't appear to behave this way, so I suspect it has to do with the custom drawing stuff (rolling my own paintComponent() method).
Any thoughts on how to figure out what is eating the CPU? I'm using NetBeans 6.7 and JDK 1.6_14 under Windows XP.
Edited by: garrysimmons on Sep 15, 2009 1:52 PM
Edited by: garrysimmons on Sep 15, 2009 2:57 PM
Edited by: garrysimmons on Sep 15, 2009 3:02 PM

It doesn't matter if it's a Swing timer or a Util timer. It behaves the same either way. That was one of the first things I tried.
I ended up refactoring the code to go from a grid of individual controls (think checker board where each square is a control that draws itself), to a single "board" control that draws a grid. That seems to have fixed the issue. I can go in/out of Standby and the app doesn't eat a ton of CPU any more. The real problem may still be there, just too small of an effect to notice.
I don't know why the original design would work fine before a Standby, but not after. Having ~200 little controls doing repaints twice a second must confuse something in the JVM/Windows versus having 4 large controls doing the same amount of drawing.
It's working, so time to move on.

BackGround picture for a Swing application??

hi,
once I got a nice idea while watching some webpages. we can give a background picture for a webpage in <body> tag?
I want to do same thing for any Swing application. Currently I am working on that issue. Any suggestions are welcome!!
santhosh

Hi everybody!
Finally I got it. now Using this We can enable background for any swing application.
the complete code is shown here. If you have any problems regarding this code, please mail to [email protected]
/******************************[TexturedImageIcon.java]***********************/
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.image.*;
import javax.swing.*;
/* this is used to generate a tiled image from a given image file.*/
public class TexturedImageIcon extends ImageIcon
     private Dimension size = new Dimension(10, 10);
     BufferedImage bimg1,bimg;
     Graphics2D g2;
     ComponentListener cl = new ComponentAdapter(){
          public void componentResized(ComponentEvent ce){
               Component c = (Component)ce.getSource();
               size = c.getSize();
               createImage();
     public void setImage(String filename){
          super.setImage(new ImageIcon(filename).getImage());
          bimg1=null;
          createImage();
     public TexturedImageIcon(Component comp, Image img){
          super(img);
          addListener(comp);
     public TexturedImageIcon(Component comp, String filename){
          super(filename);
          addListener(comp);
     public TexturedImageIcon(Component comp, URL url){
          super(url);
          addListener(comp);
     private void addListener(Component comp){
          comp.addComponentListener(cl);
     private void createImage(){
          bimg = new BufferedImage(size.width, size.height, BufferedImage.TYPE_INT_RGB);
          g2 = bimg.createGraphics();
          Rectangle2D rect = new Rectangle2D.Float(0,0,size.width-1, size.height-1);
          Rectangle2D tr = new Rectangle2D.Double(0,0,super.getIconWidth(), super.getIconHeight());
          if(bimg1==null){
               bimg1 = new BufferedImage(super.getIconWidth(), super.getIconHeight(), BufferedImage.TYPE_INT_RGB);
               Graphics2D g = bimg1.createGraphics();
               g.drawImage(super.getImage(), null, null);
          TexturePaint tp = new TexturePaint(bimg1, tr);
          g2.setPaint(tp);
          g2.fill(rect);
     public int getIconWidth(){ return size.width; }
     public int getIconHeight(){ return size.height; }
     public Image getImage(){
          System.out.println("asked");
          return bimg;
     public void paintIcon(Component c, Graphics g, int x, int y){
          Graphics2D g2d =(Graphics2D)g;
          g2d.drawImage(bimg, null, null);
     public static void main(String[] args){
          JFrame f = new JFrame();
          f.setSize(300,300);
          JLabel label = new JLabel();
          label.setBackground(Color.white);
          label.setBorder(BorderFactory.createRaisedBevelBorder());
          label.setIcon(new TexturedImageIcon(label, "world2.gif"));
          f.getContentPane().setLayout(new BorderLayout());
          f.getContentPane().add(label, BorderLayout.CENTER);
          f.show();
/*********************************[JFCUtils.java]************************/
/*The main logic to enable background picture lies in this class*/
public class JFCUtils{
     public static ContainerListener cl = new ContainerAdapter(){
          public void componentAdded(ContainerEvent ce){
               JComponent child = (JComponent)ce.getChild();
               child.setOpaque(false);
               child.addContainerListener(this);
               addlisteners(child);
     public static TexturedImageIcon enableBackGround(JFrame f, String filename){
          ((JPanel)f.getContentPane()).setOpaque(false);
          JLayeredPane lp = f.getLayeredPane();
          JLabel label = new JLabel();
          TexturedImageIcon icon = new TexturedImageIcon(label, filename);
          label.setIcon(icon);
          JPanel panel = new JPanel(new BorderLayout());
          panel.add(label, BorderLayout.CENTER);
          lp.add(panel, new Integer(Integer.MIN_VALUE));
          Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
          panel.setBounds(0, 0, screen.width,screen.height);
          addlisteners((JComponent)f.getContentPane());
          return icon;
     private static void addlisteners(Component c){
          c.toString();
          if(c instanceof JComponent) ((JComponent)c).setOpaque(false);
          if(c instanceof Container){
               Container ct = (Container)c;
               ct.addContainerListener(cl);
          for(int i=0; i<ct.getComponentCount(); i++){ //recursivly make all subcomponents transparent
               Component child = (Component)ct.getComponent(i);
               addlisteners(child);
     public static void main(String[] args){
          JFrame f = new JFrame();
          enableBackGround(f, "bg.jpg");
          JButton b = new JButton("fdfdfdfd");
          f.getContentPane().add(b, BorderLayout.NORTH);
          f.setSize(300,300);
          f.show();
/*************************************[UserDialog.java]**************************/
//to check how a swing application with background looks like
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class UserDialog extends JDialog
     JPanel contents = (JPanel)getContentPane();
     JTextField shortField = new JTextField(20);
     JTextField nameField = new JTextField(20);
     JTextField emailField = new JTextField(20);
     JTextField smtpServerField = new JTextField(20);
     JTextField pwdField = new JPasswordField(20);
     JTextField pwdField1 = new JPasswordField(20);
     boolean okay = false;
     public UserDialog(JFrame owner){
          super(owner, "New User Details", true);
          initComponents();
          pack();
          setResizable(false);
     public UserDialog(JDialog owner){
          super(owner, "New User Details", true);
          initComponents();
          pack();
          setResizable(false);
     private void initComponents(){
          JPanel west = new JPanel(new GridLayout(0, 1));
          west.add(new JLabel("Short Name"));
          west.add(new JLabel("Full Name"));
          west.add(new JLabel("Email"));
          west.add(new JLabel("SMTP Server"));
          west.add(new JLabel("Password"));
          west.add(new JLabel("Confirm Password"));
          JPanel east = new JPanel(new GridLayout(0, 1));
          east.add(shortField);
          east.add(nameField);
          east.add(emailField);
          east.add(smtpServerField);
          east.add(pwdField);
          east.add(pwdField1);
          JPanel south = new JPanel();
          JButton ok = new JButton("Ok");
          JButton cancel = new JButton("Cancel");
          south.add(ok);
          south.add(cancel);
          contents.setBorder(JFCUtils.border);
          contents.setLayout(new BorderLayout(10, 10));
          contents.add(west, BorderLayout.WEST);
          contents.add(east, BorderLayout.EAST);
          contents.add(south, BorderLayout.SOUTH);
          ActionListener al = new ActionListener(){
               public void actionPerformed(ActionEvent ae){
                    okay = ae.getActionCommand().equals("Ok");
                    setVisible(false);
          ok.addActionListener(al);
          cancel.addActionListener(al);
     private void clearFields(){
          shortField.setText("");
          nameField.setText("");
          emailField.setText("");
          smtpServerField.setText("");
          pwdField.setText("");
          pwdField1.setText("");
     public User getUser(){
          clearFields();
          okay = false;
          show();
          if(okay) return new User(shortField.getText(), nameField.getText(), emailField.getText(), smtpServerField.getText(), pwdField.getText());
          else return null;
     public static void main(String[] args){
          Dialog dlg = new UserDialog();
          TexturedImageIcon ticon = JFCUtils.enableBackGround(f, "bg.jpg");.show();
          //we can change the background picture by calling ticon.setImage(...) at runtime.

Memory Leak in a multi threaded Swing application (ImageIcon)

When I profile my swing application with netbeans 5.5 , I notice that after each periodically tidy up my image container (add,remove IconImage objects to a hashmap or arraylist), there gather by and by surviving objects. This leads to run out of memory after a while. Is there any other way to avoid this effect?
Any ideas about "The JVM is notorious for caching images."
please help..
what I have made briefly:
1.) Read the binary stream from the db :
rs=stmt.executeQuery(query);
if(rs.next()){
    int len=rs.getInt(2);
    byte [] b=new byte[len];
    InputStream in = rs.getBinaryStream(3);
    try {
            in.read(b);
            in.close();
            img=Toolkit.getDefaultToolkit().createImage(b);
     } catch (IOException e) {
            e.printStackTrace();
stmt.close();
rs.close();2.) hold the icon as field :
this.icon = new ImageIcon(img);3.) After a while I remove the object from my collection and on the
overridden method finalize() I also call the flush() method.
if(this.icon != null){
            this.icon.getImage().flush();
            this.icon = null;
}The surviving objects still increase?! On the page of SUN they
submitted a bug. But this is set on closed/fixed.
(http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4014323)
What am I doing wrong? I also use the byte[] constructor on creating the icon and
my java version is 1.5.0_10.

If in your JFrame u have placed your image, before invoke the dispose()
method put explicitly the image pointer to null and deregister all listener
you have added to any componentI implemented your suggest and after starting a long time test, in one hour there gathered aprox. 500 surviving generations. I attach a snapshot and the java file ( http://www.box.net/public/eqznamrazd ). The used heap size swings between 3MB and 5MB. I guess this wont kill so quickly the application but anyway there is something wrong!
Even properly closed streams, database connections etc.. Really despairing. Could one take a look to the java source?
some snippets bellow:
private class MyImageIcon extends ImageIcon {
        public MyImageIcon(Image img){
            super(img);
        public void removeImage(Image anImage){
            tracker.removeImage(anImage);
private class DetailDialog extends javax.swing.JFrame {
        private String personnr;
        private MyImageIcon icon;
        public DetailDialog(String personnr,MyImageIcon icon){
            this.personnr = personnr;
            this.icon = icon;
        public void dispose() {
            if(icon != null){
                icon.removeImage(icon.getImage());
                icon.getImage().flush();
                icon = null;
            super.dispose();
private class Person extends Object {
        private MyImageIcon icon;
        private String number;
        private DetailDialog detailDialog;
        protected void destroy() {
            if(icon!=null){
                icon.removeImage(icon.getImage());
                icon.getImage().flush();
                icon = null;
            if(detailDialog!=null){
                detailDialog.dispose();
private Image LoadImageFromDB(String personnr){
        Image img = null;
        String filename = personnr + ".jpg";
        Connection con = getMysqlConnection();
        Statement stmt;
        ResultSet rs;
        try {
            stmt = con.createStatement();
            String query = "select * from personImage where image='"+filename+"'";
            rs=stmt.executeQuery(query);
            if(rs.next()){
                int len=rs.getInt(2);
                byte [] b=new byte[len];
                InputStream in = rs.getBinaryStream(3);
                try {
                    in.read(b);
                    in.close();
                    img =
                            java.awt.Toolkit.getDefaultToolkit().createImage(b);
                } catch (IOException e) {
                    e.printStackTrace();
            rs.close();
            rs = null;
            stmt.close();
            stmt = null;
            con.close();
            con = null;
        } catch (SQLException e) {
            e.printStackTrace();
        return img;
public void random(){
        java.sql.ResultSet rs = null;
        java.sql.Statement stmt=null;
        java.sql.Connection con = getSybaseConnection();
        try {
            try {
                stmt = con.createStatement();
                rs = stmt.executeQuery(randomquery);
                while(rs.next()){
                    Person person = new Person();
                    person.number = rs.getString("PersonNr");
                    Image img = LoadImageFromDB(person.number);
                    if(img !=null){
                        MyImageIcon ico = new MyImageIcon(img);
                        person.icon = ico;
                    person.detailDialog = new
                            DetailDialog(person.number,person.icon);
                    personList.add(person);
                    System.out.println("Container size: " +
                            personList.size());
                    counter++;
                if(counter%20 == 0){
                    for(Person p : personList){
                        p.destroy();
                    personList.clear();
                    System.gc();//no need, but I force for this example
                    System.out.println("Container cleared, size: " +
                            personList.size());
            } catch (SQLException ex) {
                ex.printStackTrace();
            }finally{
                if(rs != null){
                    rs.close();
                }if(stmt != null){
                    stmt.close();
                }if(con != null){
                    con.close();
        } catch (SQLException ex) {
            ex.printStackTrace();
    }

Windows 7 jump list in swing application

Dear all,
what is the best way for a hobby programmer to create a windows 7 jump list in a desktop swing application. Does someone know a good example how to do e.g. the jni-calls?
I know there is a 7Goodies commercial product, but its too expensive for only fun projects.
Regards Tim

what is the best way for a hobby programmer to create a windows 7 jump list in a desktop swing application.1. Write or find a command line tool that invokes that functionality.
2. Use Runtime.exec() or Process Builder to run it.

Call OCX in Swing Application

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