Applet loading Api?

Hi,
is there a way to somehow replace original java spinning logo during applet loading with something else, and also is there a way to control the applet loading via some kind of api?
my second question is, is there an api to load one javaFX bin file into another and access its classes via API? so basically not just load as a stream of bytes but so that loader can talk to it afterward?
and all that durring runtime?
if anybody knows relative info, blog, or discussion I would appreciate if you can share it
regards
L.
Edited by: dlevancho on Apr 2, 2009 5:44 PM

This "string parameter" is doing exactly what you ask for: "+replace original java spinning logo during applet loading with something else+"...
I also remember a blog article telling how to use a small applet to show a complex load screen, then to be substituted with the larger final applet, but I don't recall where I saw that.

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tronix wrote:
..Since the next-generation java-plugin this method stopped working ..The next-gen. plug-in allows applets to hook into the PersistenceService of the JNLP API - when they are deployed using JNLP. I have a demo. of the PersistenceService (http://pscode.org/jws/api.html#ps).
It would be possible to create two versions of the applet. Version one is your current applet that uses the older methods for persistence. Version 2 uses the new methods.
To decide between them on the client side, present the plug-in 2 applet in an applet element that loads the version 1 applet as the standard applet alternative to the version 2 applet.

Repetitive Applet Loading

Hi,
I have written a [signed applet|http://code.google.com/p/jzebra/] that sends special raw data to a printer. This applet loads and works well by specifying printer parameters as applet param tags.
The applet is an open source project and has gained some momentum from a few web developers.
Since this applet is designated for printing, it's loaded and unloaded a multitude of times (possibly hundreds) per day as the applet appears on the "print page" of the web sites that use it. (Think of a bar-code print page for example). This loading and unloading seems like a redundant step that could benefit by having the applet always running instead.
In terms of functionality, I'm getting great feedback from users, but one complaint seems to be the load time of the applet for each successive load of the print page (our company uses the applet in a similar fashion).
Is there a way to keep the applet "always loaded" page-wide or site-wide and have it simply "listen" for the print jobs? (Or perhaps is our web page design just wrong?)
Suppose a pop-up or new web page loads that needs to use the applet, can the applet be residual in that fashion? It smells like a client-server relationship, but I doubt a server-side solution would work since the printers are attached locally to the workstations. I'm a fluent java developer but only know basic web development. Any help is appreciated.
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FBL wrote:
If this applet is deployed in a 1.6.0_10+ JREOur organization has flexibility on JRE versions, so requiring update 10 shouldn't be too large of a hurdle. In fact, the stations with internet access receive it automatically so we're lucky in that regard.
it is possible to configure it via JWS (even while still embedded in the web page). JWS would provide more reliable caching behaviour, and might even allow you to provide the applet sandboxed, by using the JNLP API's PrintService. When you say "webstart" and "sandboxed", I assume you mean it will be a web start application that appears to be running as an applet within the page. >Just a slight clarification. To me, web start means a way of launching, sand-boxed means as opposed to j2ee-application-client-permissions or all-permissions, and embedded in a web page means as opposed to free floating (like a JFrame).
It has been possible to launch applets using web start since Java 1.2 that become free floating. Since 1.6.0_10, it has become possible to configure an embedded applet using web start.
All security levels are available to any application or applet launched(/configured) using web start. But a 'normal' (not configured by JNLP) signed applet has one of two security levels, either sand-boxed (the user refused the digitally signed code) or all-permissions (code OK'd).
To use the web start services from the sand box, the code does not need to be digitally signed (one of the main benefits), but to get the code elevated to j2ee-application-client-permissions or all-permissions, it needs to be signed.
>
..Although the built-in PrintService makes me wonder if you're hinting into going application-less and doing the logic in php/JavaScript. The only reason it actually shows in the page, is because it was the conservative applet approach.
Having the applet outside the browser, or even "invisible" to the end-users is usually desired so as long as it's controlled through other means if necessary.
Thank you for the response and the link. I launched the PrintService demo and received the security dialogs. Is that the primary purpose of the demos? >Basically. If you want to continue to deploy as trusted, then that 'query at time of print' prompt would disappear.
>
...I didn't expect it to actually print anything. So, naturally I'll need to read more.
I'm marking this thread as answered, but I'm very interested in learning more about use Java Web Start to exploit this applet. I guess I'm still a bit undereducated on the applet -- vs -- application aspect of JWS and how to bind and exploit the api through a web page.>All the services mentioned in the [JNLP API page|http://pscode.org/jws/api.html] are available to applets deployed via web start, though some of them (file associations, single instance service..) do not make much sense for applets. But the main reason I mentioned it, as that it takes control of the class caching from the browser, and makes it more reliable. Check out the [Java Web Start|http://java.sun.com/javase/technologies/desktop/javawebstart/index.jsp] pages at Sun, but keep in mind that the embedded web start applets are fairly new, and the Sun pages probably do not mention them yet (shrugs).
It occured to me that if you are configuring the applet parameters for different products(/whatever) then you are actively generating the parameters? One slight complication is that configuring applets can be done via JS or a server side solution, whereas deployment using web start would require a unique (for each set of parameters) JNLP file that must be generated on the server side.

Multiple instances of the same applet loaded causes problem

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For example in one senario. I have an error message that displays in the Label control once they click on the button.
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Originally I had some static variables. Thinking it was being used globally by the JVM so I removed all of them and it still happens. I have tried using both the Applet and Object tag. But it still happens.
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For other solutions, I recommend searching the forum. This issue comes up a lot.

Java applet loading for a long time.

If you go here (warning - long load to start with) -
www.aclwebsite.co.uk
I have placed a newsticker java applet there but when you first visit the site the browser freezes up for a while untill the applet loads.
Any idea on whats causing this to load so much?
Thanks.

If you go here (warning - long load to start with) -
www.aclwebsite.co.uk
I have placed a newsticker java applet there but when
you first visit the site the browser freezes up for a
while untill the applet loads.
Any idea on whats causing this to load so much?
Thanks.A long-running init() or start() method of the applet. I guess you better do something about your own code then.

Java 1.5_13 applet loading problem due to 'activate control' fix

I updated my JRE to Java 1.5 revision 13, and it seems to introduce a new problem. In order to fix the "click here to activate this control" problem in internet explorer, I iterate the document model and set the outerHTML of the applet tag to the same outerHTML. This removes the annoying rectangle in IE. This also causes the applet to load and break down the first time the page is displayed, because IE removes the old applet instance and creates a new one when replacing the outerHTML. When this happens on the new Java JRE release, an exception is thrown to the user saying:
java.lang.NullPointerException
     at sun.plugin.AppletViewer.loadJarFiles(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
The applet loads correctly, but the message should not be displayed. Also, it only seems to happen sometimes (maybee because sometimes the applet does not yet start before IE runs the script to replace its contents)
Full lifecyle from the console panel:
basic: Registered modality listener
basic: Registered modality listener
liveconnect: Invoking JS method: document
liveconnect: Invoking JS method: URL
basic: Referencing classloader: sun.plugin.ClassLoaderInfo@181fbd6, refcount=5
basic: Added progress listener: sun.plugin.util.GrayBoxPainter@982291
basic: Loading applet ...
basic: Initializing applet ...
basic: Starting applet ...
basic: Unregistered modality listener
basic: Stopping applet ...
basic: Removed progress listener: sun.plugin.util.GrayBoxPainter@982291
basic: Finding information ...
basic: Releasing classloader: sun.plugin.ClassLoaderInfo@181fbd6, refcount=4
basic: Done ...
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basic: Destroying applet ...
basic: Disposing applet ...
java.lang.NullPointerException
     at sun.plugin.AppletViewer.loadJarFiles(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
basic: Exception: java.lang.NullPointerException
java.lang.NullPointerException
     at sun.plugin.AppletViewer.loadJarFiles(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
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liveconnect: Invoking JS method: URL
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basic: Added progress listener: sun.plugin.util.GrayBoxPainter@1347dad
basic: Loading applet ...
basic: Initializing applet ...
basic: Starting applet ...
Does anyone know how to fix this new issue? Or does anyone know of a better way to solve the 'activate control' problem in IE that does not cause the reloading of this applet?
Thanks.

Hi!
*1 -* Poor_Sitar_player's solution that i used.
a - Build the applet's comented code into a div ...
</div id='555>

</div>
b - After, insert a javascript the will remove the coments....
<script type="text/javascript">
var x = document.getElementById('555');
var texto = x.innerHTML;
texto = texto.replace('','');
x.innerHTML = texto;
<script type="text/javascript">
*2 - Another solution*
If you are using struts2 or your applet is inside a internal frame, is possible that the above solution will not work.
So, the solution that i found was place the applet code in the main page, with width and heigh iguals "*0*" and style="float: left;" to hide the applet.
This way, the applet will be load before you call the right page.
That's all.
Edited by: carlosmcp on Oct 14, 2008 7:01 AM

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plszz

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Hello!
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cell@tech wrote:
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</body>
</html>Bye.
RG.

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Java Plug-in 1.5.0_06
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Thanks and greetings,
Marc

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Hope that answered your question.
Dennis

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A Full trace might help us out:
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