Temporary files in a Java applet

Hi to everybody.
I am developing a Java applet that downloads ZIP files through HTTP, extract the content of these ZIP archives to a temporary folder, than uses the extracted files.
When the applet is closed (browser closed or change of page in the browser), I would like to delete all the files and directories that have been created during the ZIP extraction.
I've overridden the "destroy()" method, and I added the code to delete temp files in this method: this code recursively deletes all files and directories that are found under a given "root" directory.
The entire procedure works fine when the browser unloads the applet since a new page address has been entered in the browser's address bar (i.e., request to load a new web page).
On the other hand, there are problems when I simply close the browser (Internet Explorer): only some of the temporary files are deleted. It looks like the destroy() method is terminated before it comes to completion. I've also verified this, by trying to create a new file (named "Start.txt") at the beginning of the destroy() method (before the temp files deletion code), and another file (named "End.txt") at the end of the destroy() method (after the temp files deletion code): only the first file ("Start.txt") is created, thus confirming that the destroy() method is terminated before completion.
Do you see some solution to my problem?
I've also tried to use the deleteOnExit() method, by calling it immediately after each extracted file has been created, but this approach doesn't seem to work at all: perhaps IE does not terminate the JVM correctly...
Any suggestion would be greatly appreciated.
Thank you and best regards,
Marco.

Thanks a lot for your suggestion.
I've tried to move the temp files deletion code in the stop() method, but nothing changes: everything works fine on web page change, but when I simply close the browser the stop() method is terminated before completion (hence, only part of the temp files are actually deleted).
Any suggestion would be greatly appreciated.
Regards,
Marco.

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Ram.ViSolve wrote:
869975 wrote:
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>
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Message was edited by:
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848439 wrote:
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www.apollo3.com/~ljames

AndrewThompson64 wrote:
apollothethird wrote:
I have spent a lot of time trying to get a java applet to work on a web page. Of course, I can download zip packages and they will work.Does that somehow relate to this problem? What exactly does a Zip 'package' do when it 'works'?It displays the text on the web page.
>
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Is that a question? Please make sure to add a question mark.
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I have the gist for creating and programming java as least a basic start. ... Applets are not for newbies. Leave them alone for at least another 6 months.Thanks, Andrew. The lines of text you provided were very enlightening. I was able to do a lot of dissecting and experimenting and have the full gist of my question answered. I don?t have any problems outputting either text on the console or text on browsers.
-- L. James
L. D. James

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     examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_READ);
     examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_WRITE);
     examineGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
     examineGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
     sceneRoot.addChild(examineGroup);
     BoundingSphere behaviorBounds = new BoundingSphere(new Point3d(),
          Double.MAX_VALUE);
     MouseRotate mr = new MouseRotate();
     mr.setTransformGroup(examineGroup);
     mr.setSchedulingBounds(behaviorBounds);
     sceneRoot.addChild(mr);
     MouseTranslate mt = new MouseTranslate();
     mt.setTransformGroup(examineGroup);
     mt.setSchedulingBounds(behaviorBounds);
     sceneRoot.addChild(mt);
     MouseZoom mz = new MouseZoom();
     mz.setTransformGroup(examineGroup);
     mz.setSchedulingBounds(behaviorBounds);
     sceneRoot.addChild(mz);
     BoundingSphere lightBounds =
     new BoundingSphere(new Point3d(), Double.MAX_VALUE);
ambLight = new AmbientLight(true, new Color3f(1.0f, 1.0f, 1.0f));
ambLight.setInfluencingBounds(lightBounds);
ambLight.setCapability(Light.ALLOW_STATE_WRITE);
sceneRoot.addChild(ambLight);
headLight = new DirectionalLight();
headLight.setCapability(Light.ALLOW_STATE_WRITE);
headLight.setInfluencingBounds(lightBounds);
sceneRoot.addChild(headLight);
     universe.addBranchGraph(sceneRoot);
public static void main(String[] args) {
new MainFrame(new SimpleVrml(), 780, 780);
cylinder.wrl :
#VRML V2.0 utf8
# A cylinder
Shape {
appearance Appearance {
material Material { }
geometry Cylinder {
height 2.0
radius 1.5
view.html:
<html>
<applet code="SimpleVrml.class" width=600 height=600>
</applet>
</html>
error msg that i get :
Exception loading file from path:java.security.AccessControlException: access denied (java.util.PropertyPermission user.dir read)
i can display the wrl file in applet itself but i can't display in the browser.is it any problem with my code?Urgent, please help me. Thanks.

Java applet runs inside html page when opened with http, but no longer with "Open File" menu, why?

Using the "Open File" menu, file:///Users/234866H/Documents/atom/atomic1.html fails to open the java applet atomic1.class inside atomic.html. However, http://atom.curtin.edu.au/igor/atom/atomic1.html works just fine.
I suspect the problem arose following the recent java upgrade. It is also there on Safari.
Testing Java at http://www.java.com/en/download/testjava.jsp yields:
"Your Java is working. Your Java configuration is as follows: Vendor: Apple Inc. Version: Java SE 6 Update 51 Operating System: Mac OS X 10.6.8 Java Architecture: 64-bit"
However, this is an http test, and not an "Open File" test.
Any help would be appreciated.

Hello, I don't know about this specifically but this is what I would try.
Instead of the string "\u7834\u70C2\u7269\u7A0B\u5E8F\u5458..."
Set the encoding type in the String constructor first...
ie:
new String( "\u7834\u70C2\u7269\u7A0B\u5E8F\u5458...","GB18030");
Here is a little class I whipped up to show the CharSets that are available to you..
public class ShowAllCharSets
ShowAllCharSets()
Map myMap = Charset.availableCharsets();
Iterator iterator = myMap.keySet().iterator();
   while (iterator.hasNext())
      System.out.println("Char set name = "+((String)it.next()));
public static void main(String args[])
   new ShowAllCharSets();
}Then use the preset charset String with the specific encoding already set for your menu items.
GB18030 I picked arbitrarily because it is Chinese and you may have to try another.
Good Luck!
(T)

Temporary files in a Java applet

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