Problem in loading applet in HotJava browser

I am having a problem in loading a simple applet in HotJava
browser
The code of the applet is shown below
import java.awt.*;
import java.applet.*;
public class HelloJava extends Applet
public void paint(Graphics g)
g.drawString("Hello Java", 10, 100);
The code of the HTML file HelloJava.html is shown below :
<HTML>
<! This page includes a welcome title in the title bar and also
displays a welcome message. Then it specifies the applet to
be loaded and executed.
>
<HEAD>
<TITLE>
Welcome to Java Applets
</TITLE>
</HEAD>
<BODY>
<CENTER>
<H1> Welcome to the World of Applets </H1>
</CENTER>
<BR>
<CENTER>
<APPLET
CODE = HelloJava.class
WIDTH = 400
HEIGHT = 200 >
</APPLET>
</CENTER>
</BODY>
</HTML>
ON opening the HTML file in HotJava Browser, the following error comes up :
HelloJava: class not loaded: file:/D:/Poonam/Java/Src1/HelloJava.class:
java.lang.ClassNotFoundException: HelloJava: class not loaded: file:/D:/Poonam/Java/Src1/HelloJava.class

Well the obvious question is what is utilities.PropertyManager up to at line 23? It appears to be trying to get the system classloader which applets aren't allowed to do.
You should probably be using the ClassLoader from the class in question.

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Could not load applet in a browser using jre 1.6.0_06

Hi,
I am facing problem with loading applets when the browser uses jre 1.6.0_06.
Not able to understand what actually the problem is, I tried to check with a small applet that would simply print Hello World on the java console. Even this applet also could not be loaded on the browser. I could load this applet in the test environment of eclipse, but not able to load it on the browser when the applet is deployed on Tomcat.
We have no problems in loading applet if the browser is using an earlier version of the jre.
One more thing we have found out that, if we change the SSL cipher suite of the ssl.conf file such that it can support weaker protocols, my applet works with jre 1.6.0_06 also.
But one thing we could not understand is that why changes in SSL cipher suite of the ssl.conf file creates problem in loading the applet, only in case the browser is using jre 1.6.0_06. I mean to say that changes in the SSL cipher suite does not create any problem in loading the applet if my browser is using an earlier version of jre 1.6.0_06.
Please help me out as I don't have any clue regarding this problem.
Thanks in advance.

Hi,
We have found a wor around for this problem.
The following option has been unchecked and the applet could be loaded.
Go to java control panel
Under the Advanced Tab
Under the Security section
Uncheck the last option "Use TLSv1.0".
This makes the applet work.
But could not understand as why this is creating a problem.
We have tried to include TLSv1.0 in the cipher suite of our apache server, while keeping the above option in java plugin control panel checked, but even that did not solve the problem.
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Hi Rao,
I'm not a mac-os specialist (even I had some business with mac !!), and it is very difficult speaking in blind, but I have severals questions that may help you.
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- Does a small applet work fine on this plateform with this browser ?
- Does you applet contains instructions like System.exit, System.* or try to access (read or write) to local files ?
Otherelse it is possible you have problem with your jre config, try to configure your plugin with command like : -Xmx64m -Xms16m
(These commands tell the plugin to use at least 16 Mo memory and 64 Mo for the maximum see : http://java.sun.com/docs/hotspot/gc/)
Hope that will help you

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oad: class ChatServer.class not found.
java.lang.ClassNotFoundException: ChatServer.class
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     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
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Use the plugin for your browser that corresponds to the version of the JDK that the server is running, ie 1.2 plugin for 1.2 server.
jairag wrote:
Hi!
When I try this Hello example of weblogic in 4.5 I am getting the following error.
How to resolve this?
Very Urgent.
thanks in advance.
regards,
jai
HelloApplet: an exception occurred:
[Root exception is weblogic.rmi.UnmarshalException: Unmarshalling return
- with nested exception:
[java.io.EOFException]]javax.naming.CommunicationException
at weblogic/jndi/toolkit/ExceptionTranslator.toNamingException
at weblogic/jndi/toolkit/ExceptionTranslator.toNamingException
at weblogic/jndi/WLInitialContextFactory.toNamingException
at weblogic/jndi/WLInitialContextFactory.newContext
at weblogic/jndi/WLInitialContextFactory.getInitialContext
at weblogic/jndi/Environment.getContext
at weblogic/jndi/Environment.getInitialContext
at weblogic/rmi/Naming.getContext
at weblogic/rmi/Naming.lookup
at HelloAppletLocal.init
at com/ms/applet/AppletPanel.securedCall0
at com/ms/applet/AppletPanel.securedCall
at com/ms/applet/AppletPanel.processSentEvent
at com/ms/applet/AppletPanel.processSentEvent
at com/ms/applet/AppletPanel.run
at java/lang/Thread.run
--------------- nested within: ------------------
weblogic.rmi.UnknownHostException: Could not init server [T3://sanjay:7001/HelloServer]
- with nested exception:
[[Root exception is weblogic.rmi.UnmarshalException: Unmarshalling return
- with nested exception:
[java.io.EOFException]]javax.naming.CommunicationException]
at weblogic/rmi/Naming.getContext
at weblogic/rmi/Naming.lookup
at HelloAppletLocal.init
at com/ms/applet/AppletPanel.securedCall0
at com/ms/applet/AppletPanel.securedCall
at com/ms/applet/AppletPanel.processSentEvent
at com/ms/applet/AppletPanel.processSentEvent
at com/ms/applet/AppletPanel.run
at java/lang/Thread.run

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hello ,
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Thanx

You have to download what you have to download. You
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other applet via a method that can be known once you
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my project structure is just like this ::
on the top is ::
Applet A---> from this applet i am callling Applet B & Applet C in frame
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mode_211
enable_trace
establish_context
card_connect
select -AID a0000000030000
open_sc -security 1 -keyind 0 -keyver 0 -mac_key 404142434445464748494a4b4c4d4e4f -enc_key 404142434445464748494a4b4c4d4e4f // Open secure channel
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delete -AID a00000006203010c01
delete -AID a00000006203010c0101
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card_disconnect
release_context
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mode_211
enable_trace
establish_context
card_connect
select -AID a0000000030000
Command --> 00A4040007A0000000030000
Wrapped command --> 00A4040007A0000000030000
Response <-- 6F658408A000000003000000A5599F6501FF9F6E06405163452900734A06072A864886FC6B01600C060A2A864886FC6B02020101630906072A864886FC6B03640B06092A864886FC6B040215650B06092B8510864864020103660C060A2B060104012A026E01029000
open_sc -security 1 -keyind 0 -keyver 0 -mac_key 404142434445464748494a4b4c4d4e4f -enc_key 404142434445464748494a4b4c4d4e4f // Open secure channel
Command --> 80CA006600
Wrapped command --> 80CA006600
Response <-- 664C734A06072A864886FC6B01600C060A2A864886FC6B02020101630906072A864886FC6B03640B06092A864886FC6B040215650B06092B8510864864020103660C060A2B060104012A026E01029000
Command --> 8050000008F156D9048BF4FB6800
Wrapped command --> 8050000008F156D9048BF4FB6800
Response <-- 00008247040433914208FF020052DF76EF50F6457F4F16E031638B009000
Command --> 84820100109D59E7CE033B4A5B70115EB7CA3F523C
Wrapped command --> 84820100109D59E7CE033B4A5B70115EB7CA3F523C
Response <-- 9000
delete -AID a00000006203010c0101
Command --> 80E400800C4F0AA00000006203010C010100
Wrapped command --> 84E40080144F0AA00000006203010C01011C9450FF5E3DCB3800
Response <-- 6A88
delete_applet() returns 0x80206A88 (6A88: Referenced data not found.)
delete -AID a00000006203010c01
Command --> 80E400800B4F09A00000006203010C0100
Wrapped command --> 84E40080134F09A00000006203010C013421B120E65613F100
Response <-- 009000
delete -AID a00000006203010c0101
Command --> 80E400800C4F0AA00000006203010C010100
Wrapped command --> 84E40080144F0AA00000006203010C010136D28BC08D59D9FA00
Response <-- 6A88
delete_applet() returns 0x80206A88 (6A88: Referenced data not found.)
install -file wallet.cap -nvCodeLimit 28500 -nvDataLimit 28500 -instParam 00 -priv 2
Command --> 80E602002009A00000006203010C0608A000000003000000000AEF08C6026F60C7026F540000
Wrapped command --> 84E602002809A00000006203010C0608A000000003000000000AEF08C6026F60C7026F54005A411C50F04D651900
Response <-- 009000
Command --> 80E80000EFC48203BD010013DECAFFED010202000109A00000006203010C0602001F0013001F000000150062001201CB000A003C000700D600000000000002000004001502030107A0000000620101000107A000000062000106001200800302000104040000005CFFFF004F00640701CB000543188C0003188F00133D0610088C00028700191E2529041E160441044131191E2529051E160541044131191E252906AD00191E044116068B0004188B00057A05308F00063D181D1E8C00073B7A0110AD008B00086104037804780110AD008B00097A0221198B000A2D198B000B60101A042510A46B037A116E008D000C1A032510
Wrapped command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
Response <-- 6A80
load_applet() returns 0x80206A80 (6A80: Wrong data / Incorrect values in command data.)
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Hi all,
Sorry above i forgot to mention the java card am using. It is JCOP21 and in its datasheet its mentioned that it specification needed are javacard development kit 2.2.1, is that may be the reason for this error?
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HI,
Im facing a problem when im trying to open a URL containing a applet in IE 7.
When i checked in the settings of IE the JVM used for loading of applets is java 2 v 1.5.0_03.
This JRE is installed in my system.
The error im getting in the browser is
"THe JAVA RUN TIME ENVIRONMENT CANNOT BE LOADED"

Well, this needs further investigation, Mr. Watson ;)
Looking at the output you provided, it seems to me that you ommited the cache_version parameter. (on purpose?)
The caching process involves the check for newer versions of the jars: this can be done either using the version tag, or letting plugin compare the cached jars with the ones on the server using their timestamp. According to the output you've got, the verification is done using that timestamp. This might be the problem.
Did you check the logs of your webserver -you're using apache, right? Nothing unusual there? Raised debuglevel there?
You could try to exclude some possible problems by trying to change the verification process: Instead of using the timestamp, give it a try and use version numbers for your jars.
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Hi!
When I try this Hello example of weblogic in 4.5 I am getting the following error.
How to resolve this?
Very Urgent.
thanks in advance.
regards,
jai
HelloApplet: an exception occurred:
[Root exception is weblogic.rmi.UnmarshalException: Unmarshalling return
- with nested exception:
[java.io.EOFException]]javax.naming.CommunicationException
     at weblogic/jndi/toolkit/ExceptionTranslator.toNamingException
     at weblogic/jndi/toolkit/ExceptionTranslator.toNamingException
     at weblogic/jndi/WLInitialContextFactory.toNamingException
     at weblogic/jndi/WLInitialContextFactory.newContext
     at weblogic/jndi/WLInitialContextFactory.getInitialContext
     at weblogic/jndi/Environment.getContext
     at weblogic/jndi/Environment.getInitialContext
     at weblogic/rmi/Naming.getContext
     at weblogic/rmi/Naming.lookup
     at HelloAppletLocal.init
     at com/ms/applet/AppletPanel.securedCall0
     at com/ms/applet/AppletPanel.securedCall
     at com/ms/applet/AppletPanel.processSentEvent
     at com/ms/applet/AppletPanel.processSentEvent
     at com/ms/applet/AppletPanel.run
     at java/lang/Thread.run
--------------- nested within: ------------------
weblogic.rmi.UnknownHostException: Could not init server [T3://sanjay:7001/HelloServer]
- with nested exception:
[[Root exception is weblogic.rmi.UnmarshalException: Unmarshalling return
- with nested exception:
[java.io.EOFException]]javax.naming.CommunicationException]
     at weblogic/rmi/Naming.getContext
     at weblogic/rmi/Naming.lookup
     at HelloAppletLocal.init
     at com/ms/applet/AppletPanel.securedCall0
     at com/ms/applet/AppletPanel.securedCall
     at com/ms/applet/AppletPanel.processSentEvent
     at com/ms/applet/AppletPanel.processSentEvent
     at com/ms/applet/AppletPanel.run
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Use the plugin for your browser that corresponds to the version of the JDK that the server is running, ie 1.2 plugin for 1.2 server.
jairag wrote:
Hi!
When I try this Hello example of weblogic in 4.5 I am getting the following error.
How to resolve this?
Very Urgent.
thanks in advance.
regards,
jai
HelloApplet: an exception occurred:
[Root exception is weblogic.rmi.UnmarshalException: Unmarshalling return
- with nested exception:
[java.io.EOFException]]javax.naming.CommunicationException
at weblogic/jndi/toolkit/ExceptionTranslator.toNamingException
at weblogic/jndi/toolkit/ExceptionTranslator.toNamingException
at weblogic/jndi/WLInitialContextFactory.toNamingException
at weblogic/jndi/WLInitialContextFactory.newContext
at weblogic/jndi/WLInitialContextFactory.getInitialContext
at weblogic/jndi/Environment.getContext
at weblogic/jndi/Environment.getInitialContext
at weblogic/rmi/Naming.getContext
at weblogic/rmi/Naming.lookup
at HelloAppletLocal.init
at com/ms/applet/AppletPanel.securedCall0
at com/ms/applet/AppletPanel.securedCall
at com/ms/applet/AppletPanel.processSentEvent
at com/ms/applet/AppletPanel.processSentEvent
at com/ms/applet/AppletPanel.run
at java/lang/Thread.run
--------------- nested within: ------------------
weblogic.rmi.UnknownHostException: Could not init server [T3://sanjay:7001/HelloServer]
- with nested exception:
[[Root exception is weblogic.rmi.UnmarshalException: Unmarshalling return
- with nested exception:
[java.io.EOFException]]javax.naming.CommunicationException]
at weblogic/rmi/Naming.getContext
at weblogic/rmi/Naming.lookup
at HelloAppletLocal.init
at com/ms/applet/AppletPanel.securedCall0
at com/ms/applet/AppletPanel.securedCall
at com/ms/applet/AppletPanel.processSentEvent
at com/ms/applet/AppletPanel.processSentEvent
at com/ms/applet/AppletPanel.run
at java/lang/Thread.run

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could you please explain:
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2. If this works, try to authenticate (INIT-UPD, EXT-AUTH)
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pls give the solution.
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Awating for your reply.
Rgs
sumeet.

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Hi,
i have the same problem?
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thanks indeed
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- Is there a plugin installed on the client machine
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- Are you able to view the console. What exceptions do you see if any.. show your exceptions
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- What OS are you using, what jvm version..
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