JNLP FileOpenService vs JFileChooser getPath()

In my Web Start application, I'm trying to browse a directory and remeber the path to specific folders/files. I've managed to perform all the security coding to read in files with FileOpenService, but I've read that there is no way to actually remeber the location on the host computer where that file came from.
I would eventually like to use the mkdir() function in a selected directory and I don't want my users to have to manually select a "home" directory every time. Is there any way to get around this like JFileChooser's .getPath() function?
Thanks Much,
Daniel

It should be easy enough to write a small abstract class or interface with two concrete implementations, one for each environment, so that the rest of your program doesn't care which is in use.

Similar Messages

JNLP FileOpenService warning despite signed applet w/ "all-permissions"

Hi all,
We are deploying an applet using java 7u21. The applet is signed and the jnlp file contains a security section requesting "all-permissions". Even so, every time that we run the applet a pop-up appears with "The application has requested read/write access to a file on the machine. [...]"
My understanding is that this warning should no longer display... Is that true? The only thing I have found related to this is http://docs.oracle.com/javase/7/docs/technotes/guides/javaws/developersguide/faq.html#s407, but that seems to indicate I should only see this dialog if I lack file access permissions. (I think I have those via trusted cert + jnlp all-permissions setting).
Thanks for the help,
Buzzy
Relevant text from the link:
5074526: ExtenededService file APIs show security dialog even if app is signed.
In version 1.5.0.
When using the FileOpen Service, the security dialog will only show if the application does not
have file access permissions. This is not true with the new ExtendedService OpenFile, and
OpenFiles methods, the security dialog shows anyway.

I am having the same problem. We are using JRE 1.4.1_05. When a certain EJB is called I get:
java.security.AccessControlException: access denied (java.net.SocketPermission XXX.XX.XX.XXX:7001, connect,resolve)
at java.security.AccessControlContext.checkPermission (Unknown Source)...
I have tried setting the following permission in my jre's /lib/security/java.policy file:
grant{
permission java.net.SocketPermission "host:port", "accept,connect";
After setting this permission the EJB that caused this error seems to crash. Is this the correct permission to set for the above mentioned exception? Is there any other alternative to uninstalling the security manager?

Problems with cursor and shortcuts when using JNLP services on MAC OS X

After invoking the JNLP services on a MAC I loose the ability to set the cursor and invoke keyboard shortcuts. On Windows this is not a problem, so I believe it is a bug and I have reported it to Apple. Meanwhile, I would appreciate if someone could help me with finding a work-around. To identify the problem run the following code with Java Web Start (i.e., you need to add the program to a jar and launch it using a JNLP script). You also need to include the javax.jnlp package.
Observe that the cursor changes to cross-hairs when entering the circle. After invoking the Open file menu item, the cursor does not change any longer. Shortcut key do not work either, but if you open the menu and close it again without selecting any of the menu items, the shortcuts are OK again.
package bugreport;
import java.awt.*;
import java.awt.event.*;
import java.io.IOException;
import javax.swing.*;
import javax.jnlp.*;
public class Demo2 extends JPanel implements Runnable, MouseMotionListener {
    private int centerX = 100;
    private int centerY = 100;
    private int radius = 50;
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Demo2());
    public void run() {
        int menuMask = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
        final JFrame frame = new JFrame("Bug Demo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setPreferredSize(new Dimension(200, 200));
        addMouseMotionListener(this);
        JMenuBar menuBar = new JMenuBar();
        frame.setJMenuBar(menuBar);
        //File menu
        JMenu fileMenu = new JMenu("File");
        fileMenu.setMnemonic('F');
        menuBar.add(fileMenu);
        //openMenuItem
        JMenuItem openMenuItem = new JMenuItem("Open...");
        openMenuItem.setMnemonic('O');
        openMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, menuMask));
        openMenuItem.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                openFile();
        fileMenu.add(openMenuItem);
        frame.add(this);
        frame.pack();
        frame.setResizable(false);
        frame.setVisible(true);
    @Override
    public void paintComponent(Graphics g) {
        g.clearRect(0, 0, getWidth(), getHeight());
        g.setColor(Color.BLUE);
        g.fillOval(centerX - radius, centerY - radius, 2 * radius, 2 * radius);
    public void mouseDragged(MouseEvent e) {
    public void mouseMoved(MouseEvent e) {
        int dx = e.getX() - centerX;
        int dy = e.getY() - centerY;
        if (dx * dx + dy * dy < radius * radius) {
            setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
        } else {
            setCursor(Cursor.getDefaultCursor());
    private void openFile() {
        FileOpenService fos = null;
        try {
            fos = (FileOpenService) ServiceManager.lookup("javax.jnlp.FileOpenService");
        } catch (UnavailableServiceException ex) {
            JOptionPane.showMessageDialog(this, "Service unavailable", "Open", JOptionPane.ERROR_MESSAGE);
        if (fos != null) {
            try {
                FileContents fc = fos.openFileDialog(null, null);
            } catch (IOException ex) {
                JOptionPane.showMessageDialog(this, "Service unavailable", "Open", JOptionPane.ERROR_MESSAGE);
}Edited by: James_Vagabond on Oct 29, 2009 9:35 AM

Barbara, Thanks very much taking the time to respond to my posting. Your input and directions were just what I needed.I accessed the print settings in the pull down menu, setup the print options including the color profile for Elements and the Printer to sRGB, and printed my picture. This resolved all the invalid color problems I was having, but I did notice that there was a hint of magenta overall in the picture. I had read an article that said to use Canon Color Matching instead of Color Sync to prevent that but I couldn't make that change in the pull down menu. I tried in the Presets dialog box but that didn't appear to be possible. Should I make that change as well?
Also, in my travels through Elements 13 I notice under Edit->Color Settings that there were options for No Color Mgmt, Optimize for Screen, for Printing, or ability to chose one or the other (real time I assume). How do those options fit into this scenario?
Thanks again

Where do you get jnlp.jar for Mac Leopard 10.5.5

Hello,
I am trying to use Persistence in JNLP on a Mac 10.5.5 with either 1.5 or 1.6. I have searched
my local disk the Mac developer web site and this website for "jnlp java Mac Leopard" no useful results.
Where can I get a jnlp.jar file that works on a Mac?
Rinaldo

I was able to get the question answered on the mailto:[email protected] list.
My friend http://www.google.com/search?q=jnlp.jar+mac+java&ie=utf-8&oe=utf-8&aq=t answered it.
Greg also provided some very useful information, especially the mdfind javaws.jar command
http://lists.apple.com/archives/Java-dev/2008/Nov/msg00052.html
I see that in JDK 1.5, javaws.jar is included. For now I will assume that the javaws.jar classes have been moved to javaws.jar
jar tvf ./Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home/lib/javaws.jar | grep jnlp
        0 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/
3147 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/ApiDialog.class
1626 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/AppletAudioClip$1.class
3922 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/AppletAudioClip.class
1377 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/AppletContainer$1.class
   990 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/AppletContainer$2.class
1329 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/AppletContainer$AppletContainerContext$1$1.class
1452 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/AppletContainer$AppletContainerContext$1.class
2942 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/AppletContainer$AppletContainerContext.class
1551 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/AppletContainer$AppletContainerStub.class
   710 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/AppletContainer$LoadImageAction.class
4841 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/AppletContainer.class
   234 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/AppletContainerCallback.class
1362 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/BasicServiceImpl$1.class
1158 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/BasicServiceImpl$2.class
   992 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/BasicServiceImpl$BasicServiceBrowser.class
2397 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/BasicServiceImpl.class
1279 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/CheckServicePermission.class
   868 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/ClipboardServiceImpl$1.class
1668 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/ClipboardServiceImpl$2.class
2787 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/ClipboardServiceImpl.class
1159 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$1.class
1652 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$10.class
1318 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$2.class
1474 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$3.class
1679 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$4.class
2519 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$5.class
1739 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$6.class
1942 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$7.class
1517 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$8.class
1445 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$9.class
1398 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$DefaultProgressImpl$1.class
2914 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$DefaultProgressImpl.class
2254 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl$ProgressHelper.class
8288 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/DownloadServiceImpl.class
   900 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/ExtendedServiceImpl$1.class
1051 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/ExtendedServiceImpl$2.class
3188 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/ExtendedServiceImpl.class
   707 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/ExtensionInstallerServiceImpl$1.class
   961 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/ExtensionInstallerServiceImpl$2.class
   711 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/ExtensionInstallerServiceImpl$3.class
5918 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/ExtensionInstallerServiceImpl.class
   787 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileContentsImpl$1.class
   820 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileContentsImpl$2.class
   928 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileContentsImpl$3.class
   791 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileContentsImpl$4.class
   792 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileContentsImpl$5.class
1002 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileContentsImpl$6.class
4353 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileContentsImpl.class
2155 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileOpenServiceImpl$1.class
2323 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileOpenServiceImpl$2.class
1144 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileOpenServiceImpl$WindowsAltFileSystemView$FileSystemRoot.class
3017 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileOpenServiceImpl$WindowsAltFileSystemView.class
2974 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileOpenServiceImpl.class
2847 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileSaveServiceImpl$1.class
3257 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/FileSaveServiceImpl.class
1087 Fri Sep 05 10:32:48 EDT 2008 com/sun/jnlp/ImageCache.class
1937 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/JNLPCachedJarURLConnection$1.class
5559 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/JNLPCachedJarURLConnection.class
   940 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/JNLPClassLoader$1.class
   928 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/JNLPClassLoader$2.class
1285 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/JNLPClassLoader$3.class
12413 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/JNLPClassLoader.class
2555 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/JNLPFileFilter.class
6074 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/JNLPRandomAccessFileImpl.class
   788 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/JnlpLookupStub$1.class
2918 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/JnlpLookupStub.class
2044 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/MeteredFileOutputStream.class
   938 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl$1.class
1022 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl$10.class
1805 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl$11.class
1023 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl$2.class
   845 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl$3.class
   877 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl$4.class
   981 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl$5.class
   875 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl$6.class
   871 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl$7.class
   885 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl$8.class
   974 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl$9.class
7991 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PersistenceServiceImpl.class
   809 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PrintServiceImpl$1.class
1189 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PrintServiceImpl$2.class
   969 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PrintServiceImpl$3$1.class
1717 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PrintServiceImpl$3.class
2986 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/PrintServiceImpl.class
1441 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/SingleInstanceServiceImpl$1.class
1673 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/SingleInstanceServiceImpl$TransferListener.class
3938 Fri Sep 05 10:32:50 EDT 2008 com/sun/jnlp/SingleInstanceServiceImpl.class
     0 Fri Sep 05 10:32:48 EDT 2008 javax/jnlp/
   258 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/BasicService.class
   251 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/ClipboardService.class
1392 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/DownloadService.class
   349 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/DownloadServiceListener.class
   309 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/ExtendedService.class
   659 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/ExtensionInstallerService.class
   598 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/FileContents.class
   370 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/FileOpenService.class
   430 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/FileSaveService.class
1451 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/JNLPRandomAccessFile.class
   688 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/PersistenceService.class
   350 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/PrintService.class
   994 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/ServiceManager.class
   303 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/ServiceManagerStub.class
   185 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/SingleInstanceListener.class
   250 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/SingleInstanceService.class
   472 Fri Sep 05 10:32:50 EDT 2008 javax/jnlp/UnavailableServiceException.class

JDeveloper and jnlp.jar or javaws.jar

Hi, I am developing an applet with the JDeveloper 12c, I am using the JSDK 1.7.
While implementing the java program I need to use FileOpenService or FileContent classes for that I need to import javax.jnlp.*
But is not included in the 1.7 JDK,
My sorce code is like this:
        try {
            FileOpenService fileOpenService = (FileOpenService) ServiceManager.lookup("javax.jnlp.FileOpenService");
            FileContents contents = fileOpenService.openFileDialog(null,null);
Do you know how can I import this classes at this environment??.
Thank you in advance.

what do stacktrace mean??????? Please do not hold down you '?' key.
One question mark is enough.
Here is a simple example of a stacktrace..
If you run this code..public class ShowStackTrace {
public static void main(String[] args) {
    Object object1 = new Object();
    System.out.println( object1.getClass() );
    Object object2 = null;
    System.out.println( object2.getClass() );
}It writes this to the console..class java.lang.Object
Exception in thread "main" java.lang.NullPointerException
        at ShowStackTrace.main(ShowStackTrace.java:6)
Press any key to continue . . .The first line is program ouput.
The 2nd & 3rd lines are a stacktrace.
The stacktrace tells us exactly which line
of the program failed (line 6), and what
went wrong (NullPointerException).
Both Java applets and Java Web-Start
applications can have a console appear.
The console will show any stacktraces
that happen in the code (or it should), and
you need to find how to open the
web-start console, on your PC.
What OS and Java (version) are
you running?
And another thing. Please do not
ignore me. Twice I have asked you
to post your JNLP file, yet twice you
have not done so, and not made any
comment.
Feel free to ask questions about
anything I write that is not clear,
but be warned I will not ask again*,
for you to show us the JNLP file.
* Instead, I will just just stop repeating
myself, and stop trying to help you.

Suggest a filename extension in a save file dialog

Hello guys,
does any of you know, how to suggest the user a certain filename extension in a save file dialog?
I'm using both the normal save file dialog:
     javax.swing.JFileChooser.showSaveDialog,
and the Java Web Start save file dialog:
     javax.jnlp.FileSaveService.saveFileDialog.
For both ways I seem not to be able to suggest the user a certain extension for the filename.
For the normal dialog, I call setFileFilter on the JFileChooser instance.
The filter shows up in the dialog, and is used by default, but when the user types a name and approves, the returned filename does not have the extension added.
Of course I can add the extension programmaticaly, but not when inside the JAWS sandbox.
For the JAWS dialog, I pass an array containing my extension, but it is ignored as if I didn't specify any extensions. The API specs already say that this parameter "might be ignored by the JNLP Client".
So how to tell the user what extension to use?
More people must have encountered this problem.
I'm making an application that saves and opens xml files and exports html files.
I'm using this code to test the behavior:import java.io.ByteArrayInputStream;
import java.io.File;
import javax.jnlp.FileContents;
import javax.jnlp.FileSaveService;
import javax.jnlp.ServiceManager;
import javax.jnlp.UnavailableServiceException;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileFilter;
public class ChooseFile
    static final String[] EXTENSIONS = { "xml" };
    static final String DESCRIPTION = "XML files";
    public static void main(String[] args)
     try {
         ServiceManager.lookup("javax.jnlp.FileOpenService");
         // we're running with JAWS
         System.out.println("JAWS filechooser:");
         System.out.println(choose_JAWS());
     catch (UnavailableServiceException x)
         // we're NOT running with JAWS
         System.out.println("normal filechooser:");
         System.out.println(choose_normal());
    static String choose_normal()
     JFileChooser fc = new JFileChooser();
     fc.setFileFilter(new CustomFileFilter(EXTENSIONS, DESCRIPTION));
     if (JFileChooser.APPROVE_OPTION == fc.showSaveDialog(null))
         return "selected " + fc.getSelectedFile().getName();
     else
         return "cancelled";
    static String choose_JAWS()
     try {
         FileSaveService fos = (FileSaveService)ServiceManager.lookup(
                     "javax.jnlp.FileSaveService");
         ByteArrayInputStream stream = new ByteArrayInputStream(new byte[] {});
         FileContents fc = fos.saveFileDialog(null, EXTENSIONS, stream, null);
         if (fc != null)
          return "selected " + fc.getName();
         else
          return "cancelled";
     } catch (Exception x)
         x.printStackTrace();
        return "";
class CustomFileFilter extends FileFilter
    String[] extensions;
    String description;
    public CustomFileFilter(String[] extensions, String description)
     this.extensions = extensions;
     this.description = description;
    public boolean accept(File f)
     if (f.isDirectory())
         return true;
     String extension = getExtension(f);
        if (extension == null)
            return false;
     for (int i=extensions.length; i-->0; )
         if (extension.equals(extensions))
          return true;
     return false;
public String getDescription()
     return description;
private String getExtension(File f)
String ext = null;
String s = f.getName();
int i = s.lastIndexOf('.');
if (i > 0 && i < s.length() - 1)
ext = s.substring(i+1).toLowerCase();
return ext;
}Any help is greatly appreciated!
Tom Jansen

@tjacobs01
Hi Tom,
I have a question regarding your classes
tjacobs.ui.fc.FileExtensionFilter and
tjacobs.ui.fc.FileChooser.
When I look at your code, I see the filename extension is appended in showSaveDialog:     public int showSaveDialog(Component c) {
                    setSelectedFile(new File(f.getAbsolutePath() + "." + ((FileExtensionFilter)filter).getType()));
    }It gets the extension by calling getType on the filter. But getType is implemented as:    public String getType () {
        return mExtensionList.get(0).toString();
    }So this returns the first type in the list. It does not check what filetype is selected by the combobox.
Am I missing something?
Also, in getDescription:    public String getDescription() {
        if (mDesc == null) {
            mDesc = "";
            for (int i = 0; i < mExtensionList.size(); i++) {
                mDesc += (i != 0 ? ", " : "") + "." + mExtensionList.get(0).toString();
            mDesc+= " files";
        return mDesc;
    }you seem to iterate through the list, but only take the first entry every iteration.
Can you explain mExtensionList.get(0)?
Do you know how to test what type is selected in the JFileChooser's combobox?

Instead of using the make file can you build nirlpk.sys using MS WDK 8.0 on VS2012?

After downloading the NI nimhddk_windowsWDM-2 and -1
Instead of using the make file I built nirlpk.sys using MS WDK 8.0 on VS2012
I copied the source files out of the dir /nirlpk to the MS template for WDM drivers
It built after turning warnings as errors off.
After uninstalling the NI_DMX driver I tried to install the RLP driver that consisted of nirlp.inf and nirlpk.sys
I got this message:
Windows found driver software for your device but encounted and error while attempting to install it.
PCI-6602 RLP WDM
Driver is not intended for this platform
Is the nirlp.inf file correct for loading on Windows 7 64 bit?
Any ideas?

I have now altered the example along lines
suggested by ghaneman*, who pointed out that
a trusted application did not need to use the
FileOpenService/FileContents just to get an
InputStream.
* Mentioned on 'File associations / sandboxed app.'
http://forum.java.sun.com/thread.jspa?threadID=785224
The altered code is..
/** Load a file into the editing area.
@param path A string representing the path to the desired file. */
public void loadFile(String path) {
    // first try as if this were a trusted application..
    if (!path.equals(".")) {
        try {
            FileInputStream inputStream = new
                FileInputStream(path);
            loadFile(inputStream);
        } catch (Exception e) {
            // we do not have trust, use the FileOpenService
            loadFileByFileService(path);
    } else {
        // we only have a directory, use the FileOpenService
        loadFileByFileService(path);
public void loadFileByFileService(String path) {
    try {
        if (fileOpenService==null) {
            fileOpenService = (FileOpenService)ServiceManager.
                lookup("javax.jnlp.FileOpenService");
        fileContents = fileOpenService.openFileDialog(path, xtns);
        // the user may have cancelled the action..
        if (fileContents!=null) {
            loadFile( fileContents.getInputStream() );
    } catch(UnavailableServiceException use) {
        use.printStackTrace();
    } catch(IOException ioe) {
        ioe.printStackTrace();
}If the user launches the trusted version, and
selects 'always trust' for the (self signed)
certificate, the end user can thereafter double
click a file and see it appear in the application's
editing area with no further user interaction.

I can't open or save file with Java Web Start

Hi,
i can't open or save file with Java Web Start:
import java.io.*;
import java.util.*;
public class MetaDataFileCreator {
public String fileNameSpace = null;
public String fileName = null;
protected Properties file = null;
public MetaDataFileCreator(String fileNameSpace, String fileName) {
this.fileNameSpace = fileNameSpace;
this.fileName = fileName;
public void createMetaDataFile() {
try {
System.out.println("file METADATA");
ClassLoader cl = this.getClass().getClassLoader();
String nameFileMetaData = fileNameSpace + fileName + ".txt";
FileOutputStream fileOS = new FileOutputStream(cl.getResource(nameFileMetaData).getFile());
file = new Properties();
file.setProperty("aaaaa", "aaaa");
file.store(fileOS, "");
fileOS.close();
} catch (Exception e) {
System.out.println("Error writing metadata-file: " + e);
System.exit(1);
e.printStackTrace();
I have try also to open a file like this:
ClassLoader cl = this.getClass().getClassLoader();
file.load(cl.getResourceAsStream(nameFile));
also like this:
try {
fos = (FileOpenService)ServiceManager.lookup("javax.jnlp.FileOpenService");
fss = (FileSaveService)ServiceManager.lookup("javax.jnlp.FileSaveService");
} catch (UnavailableServiceException e) {
fss = null;
fos = null;
System.out.println("Error with JNLP");
System.exit(1);
if (fss != null && fos != null) {
try {
// get a FileContents object to work with from the
// FileOpenService
FileContents fc = fos.openFileDialog(null, null);
//FileContents newfc2 = fss.saveAsFileDialog(null, null, fc);
// get the OutputStream and write the file back out
if (fc.canWrite()) {
// don't append
os = fc.getOutputStream(false);
} catch (Exception e) {
e.printStackTrace();
also like this:
File f = new File((System.getProperty("user.home")+"x.txt").toString());
FileOutputStream fileX = new FileOutputStream(f);
OutputX = new PrintWriter(new BufferedWriter(new OutputStreamWriter(fileX, "UTF8")));
OutputX.println(....
but it doesn't work with Java Web Start.
Can someone help me?
How can I open or save file?
thank you.
Sebastiano

Did you specify <all-permissions/> in your JNLP file? Did you sign your code? What error are you getting?

Creating a FileContents breaks setTooltipText if a html string is passed

static void ThisAlsoWorks(){
try {
String message = "<html><body>This is my serialized object</body></html>";
MyToolTipTest2 toolTipTest = new MyToolTipTest2(message);
Thread.sleep(5000L);
FileOpenService fos = (FileOpenService)ServiceManager.lookup("javax.jnlp.FileOpenService");
FileContents fileContents = fos.openFileDialog(null, null);
MyToolTipTest2 toolTipTest2 = new MyToolTipTest2(message);
} catch (Exception ex) {
ex.printStackTrace();
If you mousehover the first frame before the thread.sleep ends, the tooltip shows up, the filechooser pops up, you choose a random file since it won't do anything with it, the new frame pops up, and both have their html tooltips working. However, if you relaunch it and you do not mousehover the first frame to see the tooltip before the sleep ends and the filechooser pops up, the tooltips won't ever show up anymore on either frame.
Here is a video of the issue: http://www.youtube.com/watch?v=bpuFB_RmuMQ

user9177879 wrote:
Thank you,.. You're welcome.
..following that link's workaround of adding ParserDelegator workaround = new ParserDelegator(); before using the FileContents did solve the issue somehow.Glad it worked for you. I have projects that use HTML in labels and need to revisit them to implement that workaround, though I'm busy on other matters at the moment.
BTW - when posting code or code snippets, HTML/XML or input/output, please use the code tags as described on the 'sticky post' at the top of the forum thread listing.

BufferedReader problems

Hello all.
I'm trying to use a BufferedReader to read in data from a file that is in a Jar. Locally of course it works but or WebStart I get java.Security.AccessControlException which leads me to believe that it is trying to read a local file and since my program is not signed, it fails. The jars will not be signed since there is no need for it given that all files will be contained withing the same jar (called: files.jar). I know that I can access this jar because I am getting all sorts of Images from it over Java WebStart. Here is my code:
     public Vector<String []> readFiletoVectorOfArrays (String delimeter, String path){
///unrelated code
               System.out.println ("readFileToVectorOfArrays().path: " + path);
               InputStream instream = getClass().getResourceAsStream(path);
               System.out.println ("instream.toString() = " +instream.toString());
               InputStreamReader infile = new InputStreamReader(instream);
               System.out.println ("infile.toString = " +infile.toString());
               BufferedReader inbuf = new BufferedReader(infile);
// unrelated code
}Any help is greatly appreciated.

>
nevermind, found the bug. >Glad you sorted it. Thanks for having the sense to report the solution back to the forum.
>
..it was somewhere else completely involving JFileChoosers which of course do not work over JNLP. ...>Sure they do, as your comment above about the jars not being signed indicates you already understand. JFileChoosers work just fine for a signed app. that requests extended permissions.
OTOH, local files can be accessed for either reading or writing even in sandboxed web start applications by using the JNLP API's FileOpenService* or FileSaveService. I had some examples up at my site, but it is offline for the moment.
* <http://java.sun.com/j2se/1.5.0/docs/guide/javaws/jnlp/javax/jnlp/FileOpenService.html>
An aside. I had a look at this post as soon as it first showed up. It looked to me there could be no way that code could fail in the way described, but without a complete example I did not feel confident enough to make comment.
If you can provide an example off your server, or even a post a 'complete' example of code and JNLP file that fails for other people as it does for you - that can often speed the resolution process. I am such a fan of the complete example that I wrote an article on it, which is fortunately mirrored a number of places besides my site. Here is one mirror.. <http://homepage1.nifty.com/algafield/sscce.html>
In this case, the process of preparing an SSCCE would hopefully have revealed the actual source of the error (by a simple process of eliminating unnecessary code).

FileSaveService problem

For some reason for which i cannot understand, i used to be able to do this....
FileSaveService fss = (FileSaveService)ServiceManager.lookup("javax.jnlp.FileSaveService");
FileContents fc = fss.saveFileDialog("c:\\", null, null, null);I could then write to the file at my leisure throught the FileContents class rather then pass a stream to the saveFileDialog method to write out. Passing null would just create the file ready to output data but not write anything to the file.
However, recently i recompiled and now when i run it i get a Closed Stream io error.
My current workaround is to use...
FileOpenService foc = (FileOpenService)ServiceManager.lookup("javax.jnlp.FileOpenService");
FileContents fc = foc.openFileDialog(null, null); and then i can write to the FileContents as i desire, however, the draw back is that the user has to select a file to save to from a file dialogue title "Open File..."
Any ideas ?
Thanks guys
Alistair

stream closed error has been recently caused by a bug in java.net.
What version of java is being used ? If it was a beta of 1.5.0, updating to the latest drop will fix it.
/Dietz

Jfilechooser vs jnlp

The tutorial on jfilechooser says that for a webstart app one should use the jnlp api instead of jfilechooser, but they don't say why...if I am writing a program intended to be a fat client that has access to files on the user's machine, which should I use?
Thanx

Stop crossposting. This Angela already posted that stuff in here, and I already visited your thread in the JNLP forum.

JFileChooser and JNLP

I am trying to use this code to be able to open a file:
http://java.sun.com/docs/books/tutorial/uiswing/components/example-1dot4/FileChooserDemo.java
When I run it with NetBeans, it works...
But when I try to run my .jnlp file nothing happens....
I've been trying to figure out how to get JFileChooser to work with JNLP and I am not getting anywhere. Any advice?

Stop crossposting. This Angela already posted that stuff in here, and I already visited your thread in the JNLP forum.

JFileChooser and security

Has anybody got the JFileChooser to open the user.dir or user.home directory? [I have used JFileChooser(".")] I have used the policytool to generate a policy file and also have tried to follow Irene's 10 steps to signing an applet but non have worked. I keep getting the security exception thrown that access denied to user.home or user.dir. Does anybody have an example policy file and a snippet of the JFileChooser code they used to open the local file system without getting a security exception throw? Any help would be much appreciated!
Thank you in advance,
dave

The Notpad demo uses the JNLP api to read and write files. The api doc can be found at:
http://java.sun.com/products/javawebstart/docs/javadoc/index.html
Although the Notpad demo source is not available, there is other sample code available at:
http://developer.java.sun.com/developer/releases/javawebstart/
Included here is the webpad demo, which uses the FileOpenService and
FileSaveService API's.

Why JFileChooser doesn´t show when using JWS?

I have this code where a JFileChooser is shown and the user must choose a directory where JasperReport must be exported to Excel.
Everything works fine when running locally (the jar file) but when I put in the server and my client runs it using JWS the JFileChooser dialog doesnt show up.
I am aware that the JNLP must have all-permissions, and it is but still does not show the diago to select the directory. And worse, no exceptions are shown else well.
final JFileChooser fc = new JFileChooser();
int choice = 0;
try {
     fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
     System.out.println("1"); // DOES NOT REACH THIS LINE
     fc.setDialogTitle("Select Directory to Export");
     System.out.println("2");
     fc.setApproveButtonText("Select");
     System.out.println("3");
     fc.setMultiSelectionEnabled(false);
     System.out.println("4");
     fc.setCurrentDirectory(new File("C:/Kooky/SigGraf"));
     System.out.println("5");
     choice = fc.showOpenDialog(frame);
     System.out.println("6");
} catch (Exception ex) {
     ex.printStackTrace();
if (choice == JFileChooser.APPROVE_OPTION) {
     Thread worker = new Thread() {
          @Override
          public void run() {
               String msg = "";
               try {
                    File dir = fc.getSelectedFile();
                    String local = dir.getPath();
                    msg = Report.exportarParaExcel(startDate, endDate, local);
               } catch (Exception ex) {
                    ex.printStackTrace();
               final String msg2 = msg;
               SwingUtilities.invokeLater(new Runnable() {
                    public void run() {
                         JOptionPane.showMessageDialog(frame, msg2);
     worker.start();
} else {
     JOptionPane.showMessageDialog(frame, "You did not select a directory to export the report.");
}The JNLP file:
     <security>
          <all-permissions/>
     </security>
All the jars are signed with the same certificate.

FranzAnthony wrote:
Amazing your answer, you asked for exactly what I posted, thanks a lot for your help, let it be.Please read the SSCCE link again, as it isn't "exactly" what you posted. It's so much easier to answer questions when a nice compilable and runnable example has been provided by the OP. You are not required to do this of course, but if you do provide one, the odds of getting a quick helpful answer will be greatly increased.
Or you can post a snarky comment and antagonize all the rest of the forum regulars who otherwise would have helped you. Your call.

JNLP FileOpenService vs JFileChooser getPath()

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