Java Applet Load Issues

For some applets, well, nothing happens. Im not sure what the problem is, but certain applets load, and other applets just make a gray frame and generate an error. Even my own applets I compile dont run. Everything works properly on my applets, because I can run them in the appletviewer, just not in the browser (which is kinda essential for running other peoples applets on the web, ya know). Odd thing is I can run them on my other comp, and practically the only difference is that it doesnt have the SDK on it.
Computer specs are: WinME with JDK and JRE v 1.4.1_01, and the JVM on it.
An excerpt of the error it generates every time a problematic applet is run (from my javalog.txt file):
Error loading class: <AppletName>
java.lang.NoClassDefFoundError
java.lang.ClassNotFoundException: <AppletName>
     at com/ms/vm/loader/URLClassLoader.loadClass
     at com/ms/vm/loader/URLClassLoader.loadClass
     at com/ms/applet/AppletPanel.securedClassLoad
     at com/ms/applet/AppletPanel.processSentEvent
     at com/ms/applet/AppletPanel.processSentEvent
     at com/ms/applet/AppletPanel.run
     at java/lang/Thread.run
I have no idea what any of that mess is, or why its so painful. If anyone can give a hand, Ill be checking here every 10 seconds until the time that it gets fixed, or you can email me at [email protected], thanks.

Can you find a "Sun Java Console" entry on IE's Tools menu? If not, the Sun jvm isn't installed in a manner that IE can access.
The messages that you posted in your original post are from the MS jvm. If the Sun jvm is operating, you shouldn't be seeing those messages.
If the Sun jvm is being invoked by IE, then a red/blue icon of a steaming cup of coffee will be in the Systray area of the Start bar - at the far right. If it's there, a rightclick will allow you to open the Sun java console, which will report any problems or errors encountered.
Check it out.

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Java applet load but no way to enter credential

Hello, I have all software up to date, and also last java version, seems that the applet start and load, but no way to enter credential, somebody can help? Do I use the java imbedded in safari or the last I download?
Works well with Firefox.
Thanks
Pfoke

Hello Pfoke,
Welcome to the Apple Support Communities. If you have the latest update for Java and you are still having issues with the Java applets working properly, you can re-enable Java SE 6. The following article will walk you through this process. Do not forget to restart your computer after you do this.
Java for OS X 2013-002: How to re-enable the Apple-provided Java SE 6 web plug-in and Web Start functionality.
http://support.apple.com/kb/HT5559
Regards,
-Norm G.

Java applet load status

Hello, thanks for any help.
Is it possible to predict how long an applet will take to load and with this
info devise a status bar to inform the user of the load status?
Jaco

A search with Google provided
http://www.javaworld.com/javaworld/jw-12-1996/jw-12-progressbar.html
and
http://www.google.com/search?q=java+applet+progress+bar

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 applet loading fails

Hi,
I am having JRE 1.5.0_08 version on my system. But after I have installed this version I am receiving the following message in the status bar.
Loading Java Applet Failed
When I uninstall this version...the applet works properly. Do I need to install any patch or Do I need uninstall the version
Thanks in advance,
Sudheer

I found this Metalink that solved my problem.
Note:171159.1

Java applet loads too slow.

I was wondering if there is anyway to remedy this situation:
I am using TextPad to write my java code/html code. when i send my HTML code to Internet Explorer to view my applet, it takes several seconds to load. Even while looking at other java applets, it takes a while. Is there anything I can do to speed that up?
dm0ca

Yeah....thats not much help.
I have a slower comp that can run java applets with no lag.
Anyone else have a solution?
dm0ca

Java applet loading slowdown somehow related to caching

We are getting calls from our clients complaining of slowdowns in loading our Java applet. We have found that this is related to caching because if we get them to turn caching off then the load time is reduced dramatically. We also found that if we get them to clear the cache then reload, the first time is slow because all the jar files are re-cached, and from that point on it is quick to load for a period of time before it becomes slow again.
Scenario:
Client Loads Applet - 60 sec load time.
Cache is cleared and client loads again - 90 sec load time.
Client Loads again - 25 sec load time.
Client leaves machine for an hour, no changes made to workstation
Client returns and loads applet again - 60 sec load time.
During this time nothing changes with the jar files on the server so they are not being re-cached. All cached files still remain in the cache properly. This only happens on some computers, but not others, and we can't seem to reproduce on computers that do not show this behaviour.
We are currently using the 1.5.0_06 JRE, but we experienced this with the 1.4.2_03 JRE as well. We are caching around 10mb of jar files. This one has puzzled us for a while. We thought it might be due to virus scanner settings scanning archive files, but we have ruled that out. Not sure what else
If anyone has seen a similar problem, or has any ideas please post. I am fresh out of ideas on what could be causing this slowdown. Thanks,
Tyler

I have read through the documentation there. It doesn't seem to help any. I tried to tell it which jar files to cache, but that doesn't help. It's not necessarily 1 hour until it slows down again, it is a random amount of time, but usually less than 24 hrs. Once the slowdown occurs it will happen until the cache is cleared again. If html was causing the jar files to be recached, then one would assume that if you loaded the applet again right after then it would be fast again. Unfortunately this is not the case.

Applets loading issue in Weblogic portal 10.3 - urgent

Hi,
We are upgrading WLP 8.1 to WLP 10.3, I am facing an issue on loading an applet on the client browser getting class not found exception.
The applet tag in WLP 8.1
=================
<applet name="ThisApplet" code="PrintFormApplet.class"
codebase="/bea_wls_internal/classes/projectApp@projectportal/" MAYSCRIPT height=28 width=90 >
<PARAM NAME=lastformNum VALUE="<%=lastformNum%>"/>
</applet>
works fine in WL 8.1 with any problem.
WLP 10.3 and plug-in using JRE 1.6
=======================
In Weblogic 10.3 I am getting an error class not found exception.
Is there any change to be done on the applet codebase tage ?
codebase="/bea_wls_internal/classes/"
What is the equivalent codebase to be used in WL 10.3?
This is an urgent issue to be solved. pls help on this issue asap.
Thanks,
Santha.

Solved my self:
Don't use the .class in the code tag
problem
=====
<applet name="ThisApplet" code="PrintFormApplet.class"
codebase="/bea_wls_internal/classes/projectApp@projectportal/" MAYSCRIPT height=28 width=90 >
<PARAM NAME=lastformNum VALUE="<%=lastformNum%>"/>
</applet>
solution:
======
<applet name="ThisApplet" code="PrintFormApplet"
codebase="/bea_wls_internal/classes/projectApp@projectportal/" MAYSCRIPT height=28 width=90 >
<PARAM NAME=lastformNum VALUE="<%=lastformNum%>"/>
</applet>

Applet load issue on SUSE Linux Tomcat7

Dear all,
I have one File transmission applet on my application.
I kept that applet jar in WEB-INf/lib.
When iam requesting it from browser to load it is giving...
load: class com.cra.ftm.client.applet.FTMApplet not found.
java.lang.ClassNotFoundException: com.cra.ftm.client.applet.FTMApplet
     at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection
failed:https://172.19.65.173/CRA/com/cra/ftm/client/applet/FTMApplet.class
     at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     ... 9 more
Exception: java.lang.ClassNotFoundException: com.cra.ftm.client.applet.FTMApplet
But when I kept that jar in JSP folder it statred working.
Please suggest me what else changes I have to do.
note : it is completely new environment on Tomcat7
@ SAI

hi,
you have to make sure that LPD daemon is running on your linux system. For more detail, you can refer to my blog posting here :
http://sapbasis.wordpress.com/2007/08/23/print-sap-documents-using-linux/
Ardhian
http://sapbasis.wordpress.com
http://ardhian.kioslinux.com

Applet loading issue in mozilla

I have an issue while loading two instances of same applet with two different users on same machine. When two applets are loaded the content in one applet is shown on the other applet and others data is gone. It seems the problem is with static information. But the same is working fine in IE.
== This happened ==
Every time Firefox opened

You're right, I had the same problem and found out that applets share the static context, so if you are using many instances of the same applet on a browser, you cannot use static variables unless you find a way to share them safely.

I am running 10.5.8, and just updated my java to java 5 update10. Now my firefox is missing the Java plugin, and I can't load any Java applet at all. When I try it with Safari, it hangs when certain Java applet loads. HELP!!!

Suddenly my Java plugin is missing and i can't load any Java with Firefox at all, even though i have it enabled in the browser! i've tried loading in java embedding plugin, but it doesn't work. what should i do???

It's not in Tools> Add-ons >plugins? Should be Java Plug-in 2 for NPAPI browsers 13.5.0. What are you seeing there? I don't think it's called the embedding plugin any longer.
Might try getting the Firefox 5 standalone application. Trash the current one and replace it. Doing this won't affect your Profile or any settings.
http://www.mozilla.com/en-US/firefox/all.html
If it's enabled, how can it be missing?
If this doesn't work, ask here. No need to register. Make sure you put (Mac) in the title.
http://forums.mozillazine.org/viewforum.php?f=38
Message was edited by: WZZZ
EDIT. Oops, may be different for 10.5.8. Was thinking recent Java update for 10.6. But try installing a new app anyway. In the past, this got me the latest Java plugin.

Java Applets won't load in Netscape 4

Hello,
No java applets will load in Netscape 4. I checked to see if java plugins existed and they do I actually have about 4 different versions installed on my computer because I have been trying to resolve this issue. I looked in the browsers plugins directory it contains four java .dll files. Does anybody know whats going on? In internet explorer java applets load correctly.
Thank You,
Mark

Perhaps it is due to your HTML code in the webpage? If you use the <APPLET> tag only, the applet may not run in all browser/platform. You can use HtmlConverter that comes with JDK/JRE 1.4 in order to generate HTML code which allows your applet to run in any browser/platform.
Hope it helps,
A.A.
Hello,
No java applets will load in Netscape 4. I checked to
see if java plugins existed and they do I actually
have about 4 different versions installed on my
computer because I have been trying to resolve this
issue. I looked in the browsers plugins directory it
contains four java .dll files. Does anybody know whats
going on? In internet explorer java applets load
correctly.
Thank You,
Mark

Java Applet not loading in Safari

Hi folks.
I just noticed a problem with Safari on my Macbook Pro. I'm trying to use Keepvid to download videos from Youtube but it no longer works.
I load then link into Keepvid and then get the message "Java Applet Loading..". Except that it remains stuck like this forever and it does not work at all.
How to fix this please?

I have exactly the same problem.
(my config is
windows Xp Profesional
jre 1.4.1 03
ie6)
I'm also using zonealarm as a firewall.
any Ideas?

Java Applet Constantly Asks for Authentication

With have a ADF application on Weblogic 10 that has occasional access to a Java applet. The Java applet is loaded whenever it's needed and not loaded whenever it isn't in a facet. The applet is currently in the public_html/applet folder.
When we set the SSL configuration to requiring a client certificate, when the Java applet loads, it'll constantly ask for a client certificate even though the user already presented the client when hitting the website:
Request Authentication Identification required. Please select certificate to be used for authentication.
This is annoying to users and the Java Applet doesn't need authentication. Is there any way we can disable the authentication or remove the prompt?
Here's the embedded applet code:
<applet height="1" width="1" code="applet.Applet.class"archive="/app/applet/SApplet.jar" /><param name="permissions" value="all-permissions"/></applet>
Things I've already tried:
1) Setting the Applet up on HTTP instead of HTTPS; I get a warning about mixed content and still get the authentication pop-up.
2) Created a minimal applet that only types out "HELLO WORLD" in the console, still get the authentication pop-up
Here's the console window:
Java Plug-in 1.6.0_35
Using JRE version 1.6.0_35-b10 Java HotSpot(TM) Client VM
User home directory = C:\Users\mfan
security: property package.access value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.
security: property package.access new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws
security: property package.access value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws
security: property package.access new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws,com.sun.deploy
security: property package.access value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws,com.sun.deploy
security: property package.access new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws,com.sun.deploy,com.sun.jnlp
security: property package.definition value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.
security: property package.definition new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws
security: property package.definition value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws
security: property package.definition new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws,com.sun.deploy
security: property package.definition value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws,com.sun.deploy
security: property package.definition new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws,com.sun.deploy,com.sun.jnlp
security: property package.access value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws,com.sun.deploy,com.sun.jnlp
security: property package.access new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws,com.sun.deploy,com.sun.jnlp,org.mozilla.jss
security: property package.definition value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws,com.sun.deploy,com.sun.jnlp
security: property package.definition new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.javaws,com.sun.deploy,com.sun.jnlp,org.mozilla.jss
basic: Added progress listener: sun.plugin.util.GrayBoxPainter$GrayBoxProgressListener@1df073d
basic: Plugin2ClassLoader.addURL parent called for https://192.168.130.99/app/applet/HelloWorld.jar
network: Cache entry not found [url: https://192.168.130.99/app/applet/HelloWorld.jar, version: null]
network: Connecting https://192.168.130.99/app/applet/HelloWorld.jar with proxy=DIRECT
network: Connecting http://192.168.130.99:443/ with proxy=DIRECT
security: Loading Root CA certificates from C:\Program Files (x86)\Java\jre6\lib\security\cacerts
security: Loaded Root CA certificates from C:\Program Files (x86)\Java\jre6\lib\security\cacerts
security: Loading SSL Root CA certificates from C:\Users\mfan\AppData\LocalLow\Sun\Java\Deployment\security\trusted.jssecacerts
security: Loaded SSL Root CA certificates from C:\Users\mfan\AppData\LocalLow\Sun\Java\Deployment\security\trusted.jssecacerts
security: Loading SSL Root CA certificates from C:\Program Files (x86)\Java\jre6\lib\security\cacerts
security: Loaded SSL Root CA certificates from C:\Program Files (x86)\Java\jre6\lib\security\cacerts
security: Loading Deployment SSL certificates from C:\Users\mfan\AppData\LocalLow\Sun\Java\Deployment\security\trusted.jssecerts
security: Loaded Deployment SSL certificates from C:\Users\mfan\AppData\LocalLow\Sun\Java\Deployment\security\trusted.jssecerts
security: Loading certificates from Deployment session certificate store
security: Loaded certificates from Deployment session certificate store
security: Loading certificates from Internet Explorer ROOT certificate store
security: Loaded certificates from Internet Explorer ROOT certificate store
security: Checking if certificate is in Deployment denied certificate store
security: Checking if certificate is in Deployment session certificate store
security: Checking if SSL certificate is in Deployment permanent certificate store
security: KeyUsage does not allow digital signatures
(and here's where the prompt comes up).

Actually, setting the archive to http://URL works fine. No more request authentications come up.

How to Debug Java Applet called in a BSP Component

Hi All,
In CRM Marketing->Segments->Graphical Modeler
A click on settings button will load a Java Applet window.
The settings window displays some elements. I want to translate a text displayed in that Java Applet window.
Please let me know the ways to debug a Java applet loaded from BSP Component or ways the data is loaded into Java applet from SAP.
Your help would be appreciated and points will be rewarded.
Thanks a lot in advance.

For the newbies, like me:
Instruction to setup and debug an applet in Eclipse IDE via your Browser
Java Console Setup for Applet debugging:
1. Open up the Java Console Application by double clicking on it at C:\Program Files (x86)\Java\jre1.6.0_03\bin\javacpl.exe
2. Select the Java Tab
3. View Applet Runtime Settings button
4. Enter in the Java Runtime Parameters the following: -Xdebug -Xrunjdwp:transport=dt_socket,address=5555,server=y,suspend=y
5. Note: the port address 5555 can be anytime you want. You will need to enter whatever number you select into Eclipse IDE.
6. Note: if you don�t need to debug code in the Applet�s init() method, then use....suspend=n (Not tested yet.)
Eclipse setup for Applet debugging:
1. Open up Eclipse and create your Applet. Once you are ready to debug go to the next step.
2. Select the top level Run menu
3. Pick the Open Debug Dialog� option
4. In the left column select Remote Java Application
5. Then select the �New� button to create a debug configuration for the remote session (the new button looks like a page with a yellow plus in the upper right hand corner)
6. Give your session a name. I used the class name followed with the work remote for example: mainclassnameRemote
7. Set connection type to Standard (Socket Attached)
8. Host to localhost
9. Port to 5555, or whatever you used in Java Console Setup step 5.
10. Due not check the �Allow termination of remote VM�
11. Due not close this window.
Start debugging:
1. Go to your Applet html launch file and launch in a browser
2. Then go back to eclipse and select the debug button
3. Eclipse should now throw you into the debugger mode.
4. If it hangs, just retry again. It seems to work ok most of the time. A few time I need to close the browser and start over and then it seems to work.

Java Applet Load Issues

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