Force Java Applet Reload
I'm trying to test a new version of a java applet. However, from the results I can tell that Safari is using a cached version of the jar file rather than downloading a new one from the website. I have tried emptying the cache, closing and reopening Safari, and reloading. However, I still get the old version. How can I force a reload?
Dear Jason,
Thanks to your help, I try and test and it's really work!!
Today I look deeper to the source code of the web page, it post below, could I also add
-Duser.language=en to the paragraph and get the same result?
<OBJECT
id="STUDYVIEWERV100"
WIDTH="420"
HEIGHT="200"
codebase="/jre/j2re-1_4_1_01-windows-i586-i.exe#version=1,4,1,1">
<PARAM NAME="scriptable" VALUE="true">
<PARAM NAME="-TUNNELLING" VALUE="FALSE">
<PARAM NAME="CODEBASE" VALUE="/lib">
<PARAM NAME="CODE" VALUE="com.mitra.exhibclient.ExhibAppClass">
<PARAM NAME="-VENDOR_NAME" VALUE="Agfa">
<PARAM NAME="-SHOW_LOGIN_HISTORY" VALUE="false">
<PARAM NAME="-SHOW_CHANGE_PASSWORD" VALUE="true">
<PARAM NAME="-PRODUCT_VERSION" VALUE="4.1">
<PARAM NAME="-LAF_MANAGER" VALUE="com.mitra.exhibclient.Web1000LAFMgr">
<PARAM NAME="CACHE_ARCHIVE" VALUE="ImportIzmComJni.jar,exhibit.jar,base.jar,icons.jar,lr.jar">
<PARAM NAME="-LISTEN_PORT" VALUE="80">
<PARAM NAME="scriptable" VALUE="false">
<PARAM NAME="-SHOW_PROXY" VALUE="true">
<PARAM NAME="CACHE_OPTION" VALUE="Plugin">
<PARAM NAME="-SSL_PORT" VALUE="443">
<PARAM NAME="-LOGON_BKCOLOR" VALUE="167,42,72">
<PARAM NAME="-PRODUCT_NAME" VALUE="WEB1000">
<PARAM NAME="-LOGO" VALUE="/icons/logo.gif">
<PARAM NAME="type" VALUE="application/x-java-applet;jpi-version=1.4.1_01">
<PARAM NAME="-PRODUCT_NAME_LOGO" VALUE="/icons/product.gif">
<PARAM NAME="-WAVELET_SERVLET_PORT" VALUE="80">
<PARAM NAME="-ICON_PATH" VALUE="/icons/small/">
<PARAM NAME="-SSL_ENABLE" VALUE="FALSE">
<PARAM NAME="-MAC_JRE_VERSION" VALUE="1.3.1">
<PARAM NAME="-LOG" VALUE="ERROR">
<PARAM NAME="-SHOW_TEST_PATTERN" VALUE="true">
You do not have the Java Plug-In installed.<BR>
Please Download and install Plug-In.
</OBJECT>
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I am trying to upload maps into GoogleDrive. In Firefox I get the info that the java applet cannot be installed. After installing GoogleChrome it works perfectly.
I did everything acc.to your instructions re. admitting add-ons, etc.There are other things that need your attention.
Note that your System Details List shows multiple Flash plugins.
# Shockwave Flash 12.0 r0
# Shockwave Flash 11.9 r900
You can find the installation path of all plugins on the <b>about:plugins</b> page.
You can check the Flash player installation folder for multiple Flash player plugins and remove all (older) version(s) of the plugin (NPSWF32) and (re)install the latest Flash player.
*(32 bit Windows) C:\Windows\System32\Macromed\Flash\
*(64 bit Windows) C:\Windows\SysWOW64\Macromed\Flash\
See also:
*What should I do when I see a security prompt from Java?:<br />http://www.java.com/en/download/help/appsecuritydialogs.xml -
How can one ensure that an applet re-initialise itself when returning to the applet's page after leaving to other pages.
I can only force to reload by pressing ctrl and refresh botton on the browser. Is there any tricks that can bypass this procedure and reload the applet automatically when one re-enter the applet's page?
Thanks for any great suggestion.I think that JavaScript can be very useful if you wish to establish communication between your Applet and your browser.
JavaScript -- > Java communication does not require the use of any particular API
You just neet to clearly specify the name of your applet like this :
(I prefer to use OBJECT tag than APPLET... is more generic)
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" name="myApplet" width="230" height="360" align="baseline">
<PARAM name="code" value="myApplet.class">
<PARAM name="type" value="application/x-java-applet">
<PARAM name="scriptable" value="true">
</OBJECT>Check out the scriptable parameter. This is required for Java --> JavaScript communication.
Now, let's say you want a call a method called setMyAppletName that you have implemented in your applet, you would call it from a JavaScript function like this :
function callJavaMethod(){
document.myApplet.setMyAppletName("myApplet");
}Notice that parameter name in your tag insertion tags should match the name of the applet you're tring to acces in the JavaScript function.
Java -- > JavaScript communication it's a bit more complicated. It requires the use of netscape libraries that you can find in the following path of your Netscape install :
[your Program Files directory ]\Netscape\Communicator\Program\java\classes
There you will need a jar file called java40.jar (this is what I have with Netscape 4.7) where netscape packages are found. After having isntalled this jar in my package directory, this is how I refer to API
import netscape.javascript.*;
//Reference to browser window where current applet is embedded
JSObject jsoWindow = JSObject.getWindow(this);
//Preparing parameters to be sent to a JavaScript function that is going to be called
String strHelloMsg = "Hello";
//Parameters neet to be stored in a String array in order to be passed to JavaScript function
String[] strArrParams = {strHelloMsg };
//Init JavaScript function name to be called
String strFunctionName = "showMessage"
//Call JavaScript function
_jsoWindow.call(strFunctionName, strArrParams);In your HTML page you could define such function like this :
<script>
function showMessage(strMsg){
alert(strMsg);
</script>That's all the help I can give since I don't know how JavaScript browser events work. You should find it out in the huge amounts of JavaScript tutorial and reference sites.
Good luck !
Diego -
Problem Launching Java Applet with Plug-in: Version 1.4.2_01
Hello out there:
I recently installed j2re-1.4.2_01 on my home computer but have been unable to access Web sites emmploying JAva applets. The following is an email exchange with Jeff Hall of Lowell Observatory, manager of an educational site hosted by Lowell, trying to resolve my problem. The messages are better understood if read in reverse order.
I'm hoping that someone will recognize the source of my problem and can recommmend a solution. I would appreciate any help offered.
Thanks,
Mike Coucke
Hi Jeff:
Well, I guess the problem lies with me somewhere. Here's my answer/status to your questions/suggestions:
1) I'm using MS Windows Me version 4.90.3000
2) I do have the directory C:\Windows\.jpi_cache\jar\, but the only thing in it is an empty folder labeled "1.0". The file LP.jar does not exist anywhere on my hard drive.
3) I tried several game sites that utilized Java applets and got the same results: the Java cup in the upper left corner followed a few seconds later by the red "X". So, evidently the problem is somewhere on my end.
I'm going to post our email exchanges in a Java Users Forum managed by Sun to see if anyone out there can solve my problem. However, if you have any more suggestions, I'll be glad to try them.
Thanks for the help.
Mike Coucke
[email protected]
----- Original Message -----
From: "Jeffrey Hall" <[email protected]>
To: "'Mike Coucke'" <[email protected]>
Sent: Friday, September 05, 2003 1:02 PM
Subject: RE: Registration with Lowell Education Online
Mike,
Rats! What version of Windows are you using? It's a little strange to
see the user directory set to C:\Windows; if you're using XP, I'd expect
it to be something like C:\Documents and Settings\Mike Coucke. In any
event, the output that is of concern is these two lines:
java.lang.ClassNotFoundException: LPRemote.class
Caused by: java.net.UnknownHostException: proxy
It looks like your browser is not finding our server's IP when it comes
time to download the necessary Java code.
LPRemote.class is the fundamental code that runs LOPARC, and your
browser should be downloading it automatically when you click connect.
LPRemote.class is stored along with a bunch of other classes in a file
called "LP.jar" that you download from our server. So, if you go to C:
in Windows Explorer and do a file search for LP.jar, you should find it.
On my machine, it's stored in a directory called ".jpi_cache\jar\" in my
user home directory. Let me know if you have this file, or the
jpi-cache directory.
One other thing you might try is going to a different site that you know
uses Java applets -- I think some of the online game rooms at Yahoo use
Java. See if other sites that use Java load correctly. Then we'll know
if it's our server specifically, or a more general problem on your end.
Jeff Hall
Lowell Observatory
Hello Jeff:
I still have the Java "blues". I followed your instructions, but am still unable to launch a LOPARC session. After an initial failure, I uninstalled all three Java versions I had (1.4.0, 1.4.1, 1.4.2), then reinstalled 1.4.2_01 from the Sun website.
Now, when I try to launch LOPARC, I initially get a blank window with the Java cup in the upper left corner. After about 20 seconds, the cup changes to a red "X". During those 20 seconds, the following appear in the IE message bar at the bottom of the window: "Applet LPRemote notinited" (their spelling) which changes to "Loading Java Applet Failed..." when the red "X" appears.
Following is a copy of the log from my Java Console during all of this:
Java(TM) Plug-in: Version 1.4.2_01
Using JRE version 1.4.2_01 Java HotSpot(TM) Client VM
User home directory = C:\WINDOWS
Proxy Configuration: Manual Configuration
Proxy: http=proxy,https=proxy,ftp=proxy,gopher=proxy
Proxy Overrides:
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
load: class LPRemote.class not found.
java.lang.ClassNotFoundException: LPRemote.class
at sun.applet.AppletClassLoader.findClass(Unknown Source)
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)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.UnknownHostException: proxy
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.http.HttpClient.privilegedOpenServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.<init>(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.New(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.createConnection(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at sun.applet.AppletClassLoader.getBytes(Unknown Source)
at sun.applet.AppletClassLoader.access$100(Unknown Source)
at sun.applet.AppletClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 10 more
I followed this up by executing the following three console commands:
"dump system properties"
"dump classholder list"
"dump thread list"
and obtained the following listings:
Dump system properties ...
acl.read = +
acl.read.default =
acl.write = +
acl.write.default =
application.home = C:\PROGRA~1\JAVA\J2RE14~1.2_0
awt.toolkit = sun.awt.windows.WToolkit
browser = sun.plugin
browser.vendor = Sun Microsystems, Inc.
browser.version = 1.1
deployment.javaws.cache.dir = C:\WINDOWS\.javaws\cache
deployment.javaws.jre.0.enabled = true
deployment.javaws.jre.0.location = http://java.sun.com/products/autodl/j2se
deployment.javaws.jre.0.osarch = x86
deployment.javaws.jre.0.osname = Windows
deployment.javaws.jre.0.path = C:\Program Files\Java\j2re1.4.2_01\bin\javaw.exe
deployment.javaws.jre.0.platform = 1.4
deployment.javaws.jre.0.product = 1.4.2_01
deployment.javaws.jre.0.registered = true
deployment.javaws.version = javaws-1.4.2_01
deployment.system.cacerts = C:\PROGRA~1\JAVA\J2RE14~1.2_0\lib\security\cacerts
deployment.system.home = C:\WINDOWS\Sun\Java\Deployment
deployment.system.jssecacerts = C:\PROGRA~1\JAVA\J2RE14~1.2_0\lib\security\cacerts
deployment.system.profile = C:\WINDOWS
deployment.system.security.policy = file:/C:/WINDOWS/Sun/Java/Deployment/security/java.policy
deployment.user.cachedir = C:\WINDOWS\Application Data\Sun\Java\Deployment\cache
deployment.user.certs = C:\WINDOWS\Application Data\Sun\Java\Deployment\security\deployment.certs
deployment.user.extdir = C:\WINDOWS\Application Data\Sun\Java\Deployment\ext
deployment.user.home = C:\WINDOWS\Application Data\Sun\Java\Deployment
deployment.user.jssecerts = C:\WINDOWS\Application Data\Sun\Java\Deployment\security\deployment.jssecerts
deployment.user.logdir = C:\WINDOWS\Application Data\Sun\Java\Deployment\log
deployment.user.profile = C:\WINDOWS\Application Data
deployment.user.security.policy = file:/C:/WINDOWS/Application%20Data/Sun/Java/Deployment/security/java.policy
deployment.user.tmpdir = C:\WINDOWS\Application Data\Sun\Java\Deployment\cache\tmp
file.encoding = Cp1252
file.encoding.pkg = sun.io
file.separator = \
file.separator.applet = true
http.agent = Mozilla/4.0 (Windows Me 4.90)
http.auth.serializeRequests = true
https.protocols = SSLv3,SSLv2Hello
java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironment
java.awt.printerjob = sun.awt.windows.WPrinterJob
java.class.path = C:\PROGRA~1\JAVA\J2RE14~1.2_0\classes
java.class.version = 48.0
java.class.version.applet = true
java.endorsed.dirs = C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\endorsed
java.ext.dirs = C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\ext
java.home = C:\PROGRA~1\JAVA\J2RE14~1.2_0
java.io.tmpdir = C:\WINDOWS\TEMP\
java.library.path = D:\PROGRAM FILES\INTERNET EXPLORER 6;.;C:\WINDOWS\SYSTEM;C:\WINDOWS;D:\PROGRA~1\INTERN~1;;C:\WINDOWS;C:\WINDOWS\COMMAND
java.protocol.handler.pkgs = sun.plugin.net.protocol|sun.plugin.net.protocol
java.runtime.name = Java(TM) 2 Runtime Environment, Standard Edition
java.runtime.version = 1.4.2_01-b06
java.specification.name = Java Platform API Specification
java.specification.vendor = Sun Microsystems Inc.
java.specification.version = 1.4
java.util.prefs.PreferencesFactory = java.util.prefs.WindowsPreferencesFactory
java.vendor = Sun Microsystems Inc.
java.vendor.applet = true
java.vendor.url = http://java.sun.com/
java.vendor.url.applet = true
java.vendor.url.bug = http://java.sun.com/cgi-bin/bugreport.cgi
java.version = 1.4.2_01
java.version.applet = true
java.vm.info = mixed mode
java.vm.name = Java HotSpot(TM) Client VM
java.vm.specification.name = Java Virtual Machine Specification
java.vm.specification.vendor = Sun Microsystems Inc.
java.vm.specification.version = 1.0
java.vm.vendor = Sun Microsystems Inc.
java.vm.version = 1.4.2_01-b06
javaplugin.maxHeapSize = 96m
javaplugin.nodotversion = 142_01
javaplugin.proxy.config.list = http=proxy,https=proxy,ftp=proxy,gopher=proxy
javaplugin.proxy.config.type = manual
javaplugin.version = 1.4.2_01
javaplugin.vm.options = -Djava.class.path=C:\PROGRA~1\JAVA\J2RE14~1.2_0\classes -Xbootclasspath/a:C:\PROGRA~1\JAVA\J2RE14~1.2_0\lib\plugin.jar -Xmx96m -Djavaplugin.maxHeapSize=96m -Xverify:remote -Djavaplugin.version=1.4.2_01 -Djavaplugin.nodotversion=142_01 -Dbrowser=sun.plugin -DtrustProxy=true -Dapplication.home=C:\PROGRA~1\JAVA\J2RE14~1.2_0 -Djava.protocol.handler.pkgs=sun.plugin.net.protocol
line.separator = \r\n
line.separator.applet = true
os.arch = x86
os.arch.applet = true
os.name = Windows Me
os.name.applet = true
os.version = 4.90
os.version.applet = true
package.restrict.access.netscape = false
package.restrict.access.sun = true
package.restrict.definition.java = true
package.restrict.definition.netscape = true
package.restrict.definition.sun = true
path.separator = ;
path.separator.applet = true
sun.arch.data.model = 32
sun.boot.class.path = C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\rt.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\i18n.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\sunrsasign.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\jsse.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\jce.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\charsets.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\classes;C:\PROGRA~1\JAVA\J2RE14~1.2_0\lib\plugin.jar
sun.boot.library.path = C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\bin
sun.cpu.endian = little
sun.cpu.isalist = pentium i486 i386
sun.io.unicode.encoding = UnicodeLittle
sun.java2d.fontpath =
sun.net.client.defaultConnectTimeout = 120000
sun.os.patch.level =
trustProxy = true
user.country = US
user.dir = C:\WINDOWS\Desktop
user.home = C:\WINDOWS
user.language = en
user.name = Michael G. Coucke
user.timezone =
user.variant =
Done.
Dump classloader list ...
codebase=http://kraken.lowell.edu/, key=http://kraken.lowell.edu/,IONJava/classes/ion_16.jar,IONJava/classes/LP.jar, zombie=false, cache=true, refcount=1, info=sun.plugin.ClassLoaderInfo@109de5b
Done.
Dump thread list ...
Group main,ac=11,agc=2,pri=10
main,5,alive
AWT-Windows,6,alive,dameon
AWT-Shutdown,5,alive
Java2D Disposer,10,alive,dameon
AWT-EventQueue-0,6,alive
Group Plugin Thread Group,ac=3,agc=0,pri=10
Main Console Writer,6,alive
AWT-EventQueue-1,6,alive
TimerQueue,5,alive,dameon
Group http://kraken.lowell.edu/-threadGroup,ac=2,agc=0,pri=4
thread applet-LPRemote.class,4,alive
AWT-EventQueue-2,4,alive
Done.
I'm not a Java expert, so this may be more information than you ever wanted to see.
Once again, I hope that you can help. My experience has been that I usually have some obscure option set incorrectly and that causes me great grief.
Thanks fo your help,
Mike Coucke
[email protected]
----- Original Message -----
From: "Jeffrey Hall" <[email protected]>
To: "'Mike Coucke'" <[email protected]>
Sent: Thursday, September 04, 2003 11:48 AM
Subject: RE: Registration with Lowell Education Online
Hi Mike,
Try it now. I think this problem has arisen because Sun just
released a new version of the Plug-in (1.4.2), and when we released the
public beta of LOPARC, only one relevant version (1.4.0) was available
and the LOPARC code was written to look for that by default. I have
just recoded the relevant routines so they should now cause your browser
to simply pick up the latest 1.4 version of the Plug-in you have
installed, whatever it is. I "broke" Java on my machine to replicate
your problem, and the code I inserted today did fix it. Hopefully it
will have the same effect for you. I am running IE 6 and plugin
1.4.2_01 (as accessed via Tools->Sun Java Console).
One broader problem: some (non-LOPARC-specific) users on the Sun
forums have reported the "JRE collision" you are seeing when multiple
versions of the Plug-in are installed on the same machine. So if the
fix I made to our code doesn't work, one option would be to uninstall
all Java components from your computer and do a fresh install of the
latest runtime environment.
Let me know how/if this works. Thanks for the feedback and for your
patience.
Best regards,
Jeff Hall
Lowell Observatory
-----Original Message-----
From: Mike Coucke [mailto:[email protected]]
Sent: Wednesday, September 03, 2003 6:30 PM
To: [email protected]
Subject: Re: Registration with Lowell Education Online
Hello Jeff:
So far, I have been unable to launch a LOPARC session. I repeatedly
get the following error message:
"Exception: java.lang.ClassNotFoundException: LPRemote.class"
My browser is MS Internet Explorer version 6.0.2800.1106 Initially I was
using Java Plug-In version 1.4.1 and received the error message. I went
to the Sun website and downloaded/installed Java Plug-In version 1.4.2
and still get the message.
Before I try to launch LOPARC, I can select Tools->Sun Java Console from
IE's pull down menu to check my Java Plug-In version. When I try to
launch LOPARC, I get the following message:
"Applet(s) in this HTML page requires a version of Java different from
the one the browser is currently using. In order to run the applet(s)
in this HTML page, a new browser session is required, press 'Yes' to
start a new browser session." If I select 'No', I get the following
message: "Java Plug-in detected JRE collission"
If I select 'Yes', a new browser window opens and then I get the first
message above.
Can you help?
Mike Coucke
[email protected]
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Monday, September 01, 2003 5:30 PM
Subject: Registration with Lowell Education Online
September 1, 2003
Dear Michael Coucke:
Thank you for registering with Lowell Observatory's online education
site. We hope you enjoy using it and visit regularly as we continue to
expand its features and capabilities. This is a one-time welcoming
email.
For your records, your user ID is xxxxx, and your password is #########.
You'll need to supply these each time you log in.
This site gives you access to research-grade equipment including a 16"
telescope, CCD detector, and image processing software. Our online
archive of data is now available 24/7. The telescope will be opening to
our onsite users in May, and on select nights to the Internet at large
in June.
We have designed this site so you don't need a huge monitor or a
supercomputer to use it. All pages are viewable on screens running at
800x600 resolution or higher. To use LOPARC, you'll need a Java-enabled
browser with the Java 1.4 plug-in installed. If you don't have the
plug-in, you'll be prompted to download it the first time you attempt to
connect. This is an admittedly large (9 MB) but one-time-only download.
This site works correctly under Internet Explorer version 5 or higher.
If you use Netscape, you must be running version 6 or higher, and
display or applet behavior anomalies may occur.
If at any time you can't connect to our server, simply try again later.
We do experience several power outages each year, particularly during
Flagstaff's summer thunderstorm season. Our server is fully protected
and backed up, and can be quickly brought back on line, but any active
user sessions will be lost. Thanks for your patience during these
inevitable downtimes.
Your questions, comments, suggestions, and bug reports about this site
are always welcome. On behalf of the LOPARC development team, thanks
for signing up!
Jeffrey Hall
Assistant Research Scientist
Associate Director, Education and Special Programs
Lowell Observatory
Flagstaff, ArizonaHi Mike,
I see this in your logs:
Java(TM) Plug-in: Version 1.4.2_01
Using JRE version 1.4.2_01 Java HotSpot(TM) Client VM
User home directory = C:\WINDOWS
Proxy Configuration: Manual Configuration
Proxy: http=proxy,https=proxy,ftp=proxy,gopher=proxy
Proxy Overrides:
I just helped my Dad set up his computer with a new
cable modem, and had the situation where we couldn't
access any secure Web sites. The cable folks had us
disable the proxy. It looks like the error message is
saying it can't find your proxy server, and the logs
you posted say that you've decided to configure your
proxy manually, rather than using the settings from
IE (which is how mine is set up in the plugin
control panel.)
Could that be the problem?
--Steve -
SeaMonkey v2.0.4's Java applets doesn't work all the time.
Hello. I use Mozilla's SeaMonkey v2.0.4 (using binary from mozilla.org) in Debian/Linux. I can get Java applets to work on https://eetime11.adp.com/c08e/logon but not on http://javatester.org, http://java.com/en/download/installed.jsp, and http://java.com/en/download/help/testvm.xml
Java Plug-in 1.6.0_20
Using JRE version 1.6.0_20-b02 Java HotSpot(TM) Client VM
User home directory = /home/ant
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
load: class testvm2/Main.class not found.
java.lang.ClassNotFoundException: testvm2.Main.class
at sun.applet.AppletClassLoader.findClass(Unknown Source)
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)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
FYI on my setups:
$ pwd
/home/Programs/seamonkey2/plugins
$ ls -all
total 28
drwxr-xr-x 2 ant ant 4096 2010-04-15 15:46 .
drwxr-xr-x 15 ant ant 4096 2010-04-16 08:32 ..
lrwxrwxrwx 1 root root 32 2009-11-27 17:19 libflashplayer.so -> /home/Programs/libflashplayer.so
lrwxrwxrwx 1 root root 63 2010-04-15 15:46 libjavaplugin_oji.so -> /home/Programs/jre1.6.0_20/plugin/i386/ns7/libjavaplugin_oji.so
-rwxr-xr-x 1 ant ant 15824 2009-10-17 09:30 libnullplugin.so
$ ls -all /home/Programs/jre1.6.0_20/plugin/i386/ns7/libjavaplugin_oji.so
-rwxr-xr-x 1 ant ant 137021 2010-04-12 14:39 /home/Programs/jre1.6.0_20/plugin/i386/ns7/libjavaplugin_oji.so
Does anyone know why? Thank you in advance. :)
Edited by: antdude on Apr 16, 2010 8:37 AMMore poking around:
$ java -version
java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8pre) (6b18~pre2-1)
OpenJDK Server VM (build 14.0-b16, mixed mode)
# dpkg -l | grep ^ii |grep java
ii ca-certificates-java 20091021 Common CA certificates (JKS keystore)
ii java-common 0.35 Base of all Java packages
ii libaccess-bridge-java 1.26.2-4 Java Access Bridge for GNOME
ii libaccess-bridge-java-jni 1.26.2-4 Java Access Bridge for GNOME (jni bindings)
ii libhsqldb-java 1.8.0.10-6 Java SQL database engine
ii liblucene2-java 2.9.2+ds1-1 Full-text search engine library for Java(TM)
ii libservlet2.4-java 5.0.30-12 Servlet 2.4 and JSP 2.0 Java library
ii openoffice.org-java-common 1:3.2.0-4 full-featured office productivity suite -- arch-independent Java support files
ii tzdata-java 2010h-1 time zone and daylight-saving time data for use by java runtimes
# dpkg -l | grep ^ii |grep jre
# locate bin/java
/home/Programs/jre1.6.0_20/bin/java
/home/Programs/jre1.6.0_20/bin/java_vm
/home/Programs/jre1.6.0_20/bin/javaws
/usr/bin/java
/usr/bin/javaws
/usr/lib/jvm/java-6-openjdk/bin/java
/usr/lib/jvm/java-6-openjdk/bin/java-rmi.cgi
/usr/lib/jvm/java-6-openjdk/bin/javaws
/usr/lib/jvm/java-6-openjdk/jre/bin/java
/usr/lib/jvm/java-6-openjdk/jre/bin/javaws
/usr/lib/jvm/java-6-openjdk/jre/bin/javaws.real
I tried to uninstall all the unneccesary Java packages, but still had some can't be removed because of other programs requiring it like OpenOffice:
# apt-get remove openjdk-6-jre-headless
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
openoffice.org-filter-mobiledev ttf-sil-gentium ttf-sil-gentium-basic
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
ca-certificates-java libaccess-bridge-java libaccess-bridge-java-jni libhsqldb-java liblucene2-java libservlet2.4-java
openjdk-6-jre openjdk-6-jre-headless openjdk-6-jre-lib openoffice.org openoffice.org-base openoffice.org-officebean
openoffice.org-report-builder-bin
0 upgraded, 0 newly installed, 13 to remove and 125 not upgraded.
After this operation, 114MB disk space will be freed.
Do you want to continue [Y/n]? n
Abort.
# apt-get remove java-common
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
openoffice.org-filter-mobiledev ttf-sil-gentium ttf-sil-gentium-basic
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
ca-certificates-java java-common libaccess-bridge-java libaccess-bridge-java-jni libhsqldb-java liblucene2-java
libservlet2.4-java openjdk-6-jre openjdk-6-jre-headless openjdk-6-jre-lib openoffice.org openoffice.org-base
openoffice.org-officebean openoffice.org-report-builder-bin
0 upgraded, 0 newly installed, 14 to remove and 125 not upgraded.
After this operation, 115MB disk space will be freed.
Do you want to continue [Y/n]? n
Abort.
Any ideas? :( -
COMMUNICATION BETWEEN JAVASCRIPT AND JAVA APPLET: US$20 AWARD FOR SOLUTION!
COMMUNICATION BETWEEN JAVASCRIPT AND JAVA APPLET PROBLEM (Easy Filter Java Applet) -
US$20 TO ANYONE WHO CAN RESOLVE THE PROBLEM
To forum visitors:
I am prepared to pay a standard shareware fee of US$20 to a user who can resolve this technical problem.
If your advice resolves the problem, I'll forward the payment to your postal address (include your
address with your reply, and also your email address)
I am attempting to enable a HTML button (using Javascript's onClick command) to directly input a number into one of the parameter text boxes in the Easy Filter Java applet (ie, enter a new color value number in the text field of the standard Colors Multiplicator Filter interface).
The applet is Freeware and can be downloaded at: http://www.javazoom.net/applets/easyfilter10/EasyFilter10.html
(It is a very effective bitmap display and editing utility)
To achieve this, I am trying to access the part of the applet that defines and sets the textbox. The text box is defined in the .class file by accessing the parameter details in the genericfilter.txt file (accompanies the .class files). I need to access 'private String appletInitialize()' and then one of the 'textFieldParameters' which sets the textbox.
I understand the basic syntax for referencing the applet:
document.appletname.setString("An example"). However, accessing the text fields in this applet is more complex!!
Please can you recommend the correct Javascript syntax to achieve communication with the applet.
Thank you for your kind assistance.
JM Graham
[email protected]
The Java source code for the applet: EasyFilter.class
# Easy Filter - E.B/JavaZOOM 1999 #
# Contact: [email protected] #
# http://javazoom.hypermart.net #
/* Originally compiled from EasyFilter.java */
import java.awt.*;
import java.io.*;
import java.net.*;
import java.applet.Applet;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.image.MemoryImageSource;
import java.awt.image.PixelGrabber;
import java.util.Vector;
public synchronized class EasyFilter extends Applet implements KeyListener
private String paramFileName;
private Color bgColor;
private Color fgColor;
private Color parColor;
private Color sepColor;
private Color titleColor;
private Color helpColor;
private int WinWidth;
private int WinHeight;
private String title;
private String logoFileName;
private String originalImageFileName;
private String filteredCaption;
private String originalCaption;
private Vector paramsName;
private Vector paramsValue;
private Vector paramsComment;
private Panel panelParameters[];
private Label labelParameters[];
private TextField textFieldParameters[];
private Label labelComments[];
private int nbParameters;
private ScrollPane scrollPaneParams;
private Panel panelParams;
private Image theLogo;
private Image theOriginalImage;
private Image theFilteredImage;
private int theOriginalPixelArray[];
private int logoWidth;
private int logoHeight;
private int imageWidth;
private int imageHeight;
private drawCanvas canvasTitle;
private Panel panelTitle;
private Label labelTitle;
private Panel panelImages;
private Panel panelOriginalImage;
private drawCanvas canvasOriginalImage;
private Label labelOriginalImage;
private Panel panelFilteredImage;
private drawCanvas canvasFilteredImage;
private Label labelFilteredImage;
private Panel panelHelp;
private Label labelHelp;
private int Yspc;
private FilterImplementation theFilter;
public void init()
String string = null;
string = appletInitialize();
setBackground(bgColor);
if (string != null)
removeAll();
setBackground(Color.white);
setForeground(Color.black);
Label label = new Label(new StringBuffer("Error: ").append(string).toString(), 1);
Panel panel = new Panel();
panel.add(label);
add(panel);
setLayout(new FlowLayout(1, 5, Yspc));
public void keyPressed(KeyEvent keyEvent)
panelHelp.removeAll();
boolean flag = true;
if (KeyEvent.getKeyText(keyEvent.getKeyCode()).equals("Enter"))
for (int i = 0; i < nbParameters; )
try
paramsValue.setElementAt(new Double(textFieldParameters.getText()), i);
i++;
catch (NumberFormatException e)
labelHelp.setText(labelParameters[i].getText() + ": Not a Number");
flag = false;
break;
if (flag == 1)
labelHelp.setText(" .... Running, please wait .... ");
labelHelp.setAlignment(1);
panelHelp.add(labelHelp);
panelHelp.doLayout();
theFilter.updateParameters(paramsValue);
theFilter.computeFilter();
theFilteredImage = createImage(new MemoryImageSource(theFilter.getFinalImageWidth(), theFilter.getFinalImageHeight(), theFilter.getFinalImageBuffer(), 0, theFilter.getFinalImageWidth()));
canvasFilteredImage.setImage(theFilteredImage);
canvasFilteredImage.setBounds(0, 0, theFilter.getFinalImageWidth(), theFilter.getFinalImageHeight());
canvasFilteredImage.repaint();
panelHelp.removeAll();
labelHelp.setText("- Done -");
else
labelHelp.setText("- Press Enter to run the Filter -");
labelHelp.setAlignment(1);
panelHelp.add(labelHelp);
panelHelp.doLayout();
public void keyReleased(KeyEvent keyEvent)
public void keyTyped(KeyEvent keyEvent)
private String appletInitialize()
WinWidth = size().width;
WinHeight = size().height;
if (getParameter("bgcolor") == null)
bgColor = new Color(0, 0, 40);
else
bgColor = new Color(Integer.parseInt(getParameter("bgcolor"), 16));
if (getParameter("fgcolor") == null)
fgColor = new Color(255, 255, 255);
else
fgColor = new Color(Integer.parseInt(getParameter("fgcolor"), 16));
if (getParameter("sepcolor") == null)
sepColor = new Color(158, 128, 128);
else
sepColor = new Color(Integer.parseInt(getParameter("sepcolor"), 16));
if (getParameter("parcolor") == null)
parColor = new Color(24, 24, 24);
else
parColor = new Color(Integer.parseInt(getParameter("parcolor"), 16));
if (getParameter("titlecolor") == null)
titleColor = new Color(255, 255, 0);
else
titleColor = new Color(Integer.parseInt(getParameter("titlecolor"), 16));
if (getParameter("helpcolor") == null)
helpColor = new Color(0, 255, 255);
else
helpColor = new Color(Integer.parseInt(getParameter("helpcolor"), 16));
paramsName = new Vector();
paramsValue = new Vector();
paramsComment = new Vector();
paramFileName = getParameter("paramfile");
String string = readParams(paramFileName);
if (string != null)
return string;
MediaTracker mediaTracker = new MediaTracker(this);
theOriginalImage = getImage(getDocumentBase(), originalImageFileName);
mediaTracker.addImage(theOriginalImage, 0);
if (logoFileName != null)
theLogo = getImage(getDocumentBase(), logoFileName);
mediaTracker.addImage(theLogo, 1);
try
mediaTracker.waitForAll();
catch (InterruptedException e1)
return "Error while loading image";
if (mediaTracker.isErrorAny())
return "Error while loading image";
if (logoFileName != null)
logoWidth = theLogo.getWidth(this);
logoHeight = theLogo.getHeight(this);
imageWidth = theOriginalImage.getWidth(this);
imageHeight = theOriginalImage.getHeight(this);
theOriginalPixelArray = new int[imageWidth * imageHeight];
PixelGrabber pixelGrabber = new PixelGrabber(theOriginalImage, 0, 0, imageWidth, imageHeight, theOriginalPixelArray, 0, imageWidth);
try
pixelGrabber.grabPixels();
panelTitle = new Panel();
canvasTitle = new drawCanvas();
labelTitle = new Label();
panelTitle.setLayout(new FlowLayout(1, 10, Yspc));
add(panelTitle);
panelTitle.setBackground(bgColor);
panelTitle.add(canvasTitle);
canvasTitle.setImage(theLogo);
canvasTitle.setBounds(0, 0, logoWidth, logoHeight);
labelTitle.setText(title);
catch (InterruptedException e2)
return "Internal Error, Try RELOAD !";
if (title != null)
panelTitle.add(labelTitle);
labelTitle.setForeground(titleColor);
labelTitle.setFont(new Font("Dialog", 1, 14));
panelImages = new Panel();
panelOriginalImage = new Panel();
canvasOriginalImage = new drawCanvas();
labelOriginalImage = new Label();
panelFilteredImage = new Panel();
canvasFilteredImage = new drawCanvas();
labelFilteredImage = new Label();
panelImages.setLayout(new FlowLayout(1, 10, Yspc));
add(panelImages);
panelImages.setBackground(bgColor);
panelOriginalImage.setLayout(new BorderLayout(0, 2));
panelImages.add(panelOriginalImage);
panelOriginalImage.setBackground(Color.black);
panelOriginalImage.add("Center", canvasOriginalImage);
canvasOriginalImage.setImage(theOriginalImage);
canvasOriginalImage.setBounds(0, 0, imageWidth, imageHeight);
labelOriginalImage.setText(originalCaption);
labelOriginalImage.setAlignment(1);
panelOriginalImage.add("South", labelOriginalImage);
labelOriginalImage.setBackground(Color.lightGray);
labelOriginalImage.setForeground(Color.black);
labelOriginalImage.setFont(new Font("SansSerif", 0, 10));
panelFilteredImage.setLayout(new BorderLayout(0, 2));
panelImages.add(panelFilteredImage);
panelFilteredImage.setBackground(Color.black);
panelFilteredImage.add("Center", canvasFilteredImage);
theFilter = new FilterImplementation(paramsValue, theOriginalPixelArray, imageWidth, imageHeight);
theFilter.computeFilter();
theFilteredImage = createImage(new MemoryImageSource(theFilter.getFinalImageWidth(), theFilter.getFinalImageHeight(), theFilter.getFinalImageBuffer(), 0, theFilter.getFinalImageWidth()));
canvasFilteredImage.setImage(theFilteredImage);
canvasFilteredImage.setBounds(0, 0, theFilter.getFinalImageWidth(), theFilter.getFinalImageHeight());
labelFilteredImage.setText(filteredCaption);
labelFilteredImage.setAlignment(1);
panelFilteredImage.add("South", labelFilteredImage);
labelFilteredImage.setBackground(Color.lightGray);
labelFilteredImage.setFont(new Font("SansSerif", 0, 10));
scrollPaneParams = new ScrollPane(0);
panelParams = new Panel();
nbParameters = paramsName.size();
int i = WinHeight - (33 + 7 * Yspc + logoHeight + imageHeight + 23);
if (i < Yspc + 2 + 24)
i = Yspc + 2 + 24;
scrollPaneParams.setBounds(0, 0, WinWidth - 10, i);
panelParams.setLayout(new GridLayout(nbParameters, 1, 5, Yspc / 2));
scrollPaneParams.add(panelParams);
panelParams.setBackground(sepColor);
panelParameters = new Panel[nbParameters];
labelParameters = new Label[nbParameters];
textFieldParameters = new TextField[nbParameters];
labelComments = new Label[nbParameters];
for (int j = 0; j < nbParameters; j++)
panelParameters[j] = new Panel();
panelParameters[j].setLayout(new FlowLayout(0, 5, 1));
panelParams.add(panelParameters[j]);
panelParameters[j].setBackground(parColor);
labelParameters[j] = new Label();
labelParameters[j].setText((String)paramsName.elementAt(j));
panelParameters[j].add(labelParameters[j]);
labelParameters[j].setForeground(fgColor);
labelParameters[j].setFont(new Font("Dialog", 1, 12));
textFieldParameters[j] = new TextField(8);
textFieldParameters[j].setText(paramsValue.elementAt(j).toString());
panelParameters[j].add(textFieldParameters[j]);
textFieldParameters[j].setBackground(fgColor);
textFieldParameters[j].addKeyListener(this);
labelComments[j] = new Label();
labelComments[j].setText((String)paramsComment.elementAt(j));
panelParameters[j].add(labelComments[j]);
labelComments[j].setForeground(fgColor);
add(scrollPaneParams);
panelHelp = new Panel();
labelHelp = new Label();
panelHelp.setLayout(new FlowLayout(1, 5, 0));
add(panelHelp);
panelHelp.setBackground(bgColor);
labelHelp.setText(" Change colour values and press enter ");
labelHelp.setAlignment(1);
panelHelp.add(labelHelp);
labelHelp.setForeground(helpColor);
return null;
private String readParams(String string1)
Object object1;
String string2;
if (string1 == null)
return "Filename of filter's parameters needed";
try
URL uRL = new URL(getDocumentBase(), string1);
URLConnection uRLConnection = uRL.openConnection();
uRLConnection.setDoInput(true);
uRLConnection.setUseCaches(false);
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(uRLConnection.getInputStream()));
string2 = null;
catch ()
return object1.getMessage();
catch ()
return object1.getMessage();
catch ()
return object1.getMessage();
if (bufferedReader != null)
Object object2;
try
for (object2 = bufferedReader.readLine(); object2 != null && string2 == null; object2 = bufferedReader.readLine())
string2 = extractFormat(object2);
catch ()
string2 = object2.getMessage();
finally
bufferedReader.close();
if (string2 != null)
return string2;
else
return null;
private String extractFormat(String string1)
if (string1.length() == 0)
return null;
int i = 0;
int j = string1.indexOf(" ", i);
if (j == -1)
return "Bad format error (space missing)";
String string2 = string1.substring(i, j);
if (string2.equals("TITLE"))
i = j;
j = string1.indexOf(34, i);
if (j == -1)
return "Bad format (Double quote in TITLE missing)";
i = j + 1;
j = string1.indexOf(34, i);
if (j == -1)
return "Bad format (Double quote in TITLE missing)";
title = string1.substring(i, j);
return null;
if (string2.equals("ORIGINALCAPTION"))
i = j;
j = string1.indexOf(34, i);
if (j == -1)
return "Bad format (Double quote in ORIGINALCAPTION missing)";
i = j + 1;
j = string1.indexOf(34, i);
if (j == -1)
return "Bad format (Double quote in ORIGINALCAPTION missing)";
originalCaption = string1.substring(i, j);
return null;
if (string2.equals("FILTEREDCAPTION"))
i = j;
j = string1.indexOf(34, i);
if (j == -1)
return "Bad format (Double quote in FILTEREDCAPTION missing)";
i = j + 1;
j = string1.indexOf(34, i);
if (j == -1)
return "Bad format (Double quote in FILTEREDCAPTION missing)";
filteredCaption = string1.substring(i, j);
return null;
if (string2.equals("LOGO"))
i = j + 1;
j = string1.length();
logoFileName = string1.substring(i, j);
return null;
if (string2.equals("ORIGINALIMAGE"))
i = j + 1;
j = string1.length();
originalImageFileName = string1.substring(i, j);
return null;
if (!string2.equals("PARAM"))
return null;
i = j;
j = string1.indexOf(34, i);
if (j == -1)
return "Bad format in a PARAM line";
i = j + 1;
j = string1.indexOf(34, i);
if (j == -1)
return "Bad format in a PARAM line";
paramsName.addElement(string1.substring(i, j));
i = j + 2;
j = string1.indexOf(32, i);
if (j == -1)
return "Bad format in a PARAM line";
try
paramsValue.addElement(new Double(string1.substring(i, j)));
j = string1.indexOf(34, i);
catch (NumberFormatException e)
return "Bad format in a PARAM line";
if (j == -1)
return "Bad format (Double quote in PARAM comment missing)";
i = j + 1;
j = string1.indexOf(34, i);
if (j == -1)
return "Bad format (Double quote in PARAM comment missing)";
paramsComment.addElement(string1.substring(i, j));
return null;
public EasyFilter()
logoHeight = 33;
Yspc = 5;Addition to my above submission
To clarify, I'll offer the US$20 to the FIRST person who offers me a workable solution to the problem, not to everyone!!!
JMGRAHAM -
I can not open java applet on a certain website. started about 4 days ago.
== Issue
==
Firefox is having problems with certain web sites
== Description
==
i am no longer able to open the first 4 webcams on this website. this started about 4 or 5 days ago. i also have a macbook that is running the same firefox and i can open them on that computer. i can open the webcams if i open them under the safari browser. i am running version 3.6.3 on mac os 10.6.3 thanks
== URL of affected sites
==
http://www.colorado-west.com/cooke/
== Troubleshooting information
==
java embedding plugin 0.9.7.2 mrj plugin 1.0 jep 0.9.7.2
== Firefox version
==
3.6.3
== Operating system
==
Intel Mac OS X 10.6
== User Agent
==
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3
== Plugins installed
==
*-Gecko default plugin
*Runs Java applets using the latest installed versions of Java. For more information: Java Embedding Plugin. Run version test: Java Information.
*iPhoto6
*Garmin Communicator Plug-in Version 2.8.2.0
*3.0.50106.0
*The Google Earth Plugin allows you to view 3D imagery and terrain in your web browser.
*The Flip4Mac WMV Plugin allows you to view Windows Media content using QuickTime.
*Shockwave Flash 10.0 r42
*The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime Web site.Try to reload those web page(s) and bypass the cache.
* Press and hold Shift and left-click the Reload button.
* Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
* Press "Cmd + Shift + R" (MAC) -
Java Applet in a HTML page: failing with PLS-00306: wrong number of args
We are trying to use a Java Applet in a HTML page. as our system needs to be able to retrieve a predefined set of data from a third party system that uses Dynamic Data Exchange Protocol (DDE) and are encountering errors from APEX and in IE itself.
We are using JavaDde from www.nevaobject.com that enables our Java applet to interact with Windows applications (Third Party System) using DDE.
This functionality is currently used in our Web Form 6i application and we are trying to use the same in the new ApEx application.
We are using ApEx version : 2.1 and actually aer encountering 2 problems:
Problem 1: ApEx failing with PLS-00306: wrong number or types of arguments in call to 'ACCEPT'
Problem 2: IE crashes if Applet used in a complex page with several regions (1 Context, 4 Report Regions, 2 level Tabs, Links)
This problem does not occur in the page where there is only applet and one region. In the case of complex page the IE crashes if the page is reloaded
Test scenario:
1- Create a simple page with the HTML region.
2- Define the Source of the above region as follows
<OBJECT CLASSID="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
CODEBASE="http://java.sun.com/products/plugin/autodl/jinstall-1_4-windows-i586.cab#version=1,4,0,0"
WIDTH="1"
HEIGHT="1"
ID="simpleApplet"
NAME="simpleApplet">
<PARAM NAME="code" VALUE="simpleApplet.class" >
<PARAM NAME="archive" VALUE="simpleApplet.jar" />
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.4">
</OBJECT>
3- Create a simple Java applet "simpleApplet" - for the test its enough if the applet will have just the init method printing out the mesage to the console
4- Create a Submit Button (not redirect) in Region Header and create unconditional (do not set When Button Pressed property) Page Branch to navigate to another page (the page without the applet)
6- Run the page and Submit -
The error below is returned by the engine:
In our case our applet is called ddeApplet - I do not know why is ApEx passing the Applet's ID down to the wwv_flow.accept method as a parameter
Tue, 24 Jul 2007 08:15:39 GMT
ORA-06550: line 7, column 2:
PLS-00306: wrong number or types of arguments in call to 'ACCEPT'
ORA-06550: line 7, column 2:
PL/SQL: Statement ignored
DAD name: rbdev2_ax
PROCEDURE : wwv_flow.accept
URL : http://castor:7778/pls/rbdev2_ax/wwv_flow.accept
PARAMETERS :
============
P_FLOW_ID:
147
P_FLOW_STEP_ID:
500
P_INSTANCE:
6986070096861669560
P_PAGE_SUBMISSION_ID:
1005758
P_REQUEST:
CRASH
P_ARG_NAMES:
100380029717786501
P_T01:
147
P_T02:
101
P_T03:
5000044
P_T04:
1
P_T05:
S
DDEAPPLET:
Ddeapplet[panel0,0,0,1x1,layout=java.awt.BorderLayout,rootPane=javax.swing.JRootPane[,0,0,1x1,layout=javax.swing.JRootPane$RootLayout,alignmentX=null,alignmentY=null,border=,flags=385,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true]
P_MD5_CHECKSUM:
ENVIRONMENT:
============
PLSQL_GATEWAY=WebDb
GATEWAY_IVERSION=2
SERVER_SOFTWARE=Oracle HTTP Server Powered by Apache/1.3.19 (Unix) mod_fastcgi/2.2.10 mod_perl/1.25 mod_oprocmgr/1.0
GATEWAY_INTERFACE=CGI/1.1
SERVER_PORT=7778
SERVER_NAME=castor
REQUEST_METHOD=POST
QUERY_STRING=
PATH_INFO=/pls/rbdev2_ax/wwv_flow.accept
SCRIPT_NAME=/pls
REMOTE_HOST=
REMOTE_ADDR=192.168.66.169
SERVER_PROTOCOL=HTTP/1.1
REQUEST_PROTOCOL=HTTP
REMOTE_USER=
HTTP_CONTENT_LENGTH=661
HTTP_CONTENT_TYPE=application/x-www-form-urlencoded
HTTP_USER_AGENT=Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
HTTP_HOST=castor:7778
HTTP_ACCEPT=image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-powerpoint, application/vnd.ms-excel, application/msword, application/x-shockwave-flash, */*
HTTP_ACCEPT_ENCODING=gzip, deflate
HTTP_ACCEPT_LANGUAGE=en-us
HTTP_ACCEPT_CHARSET=
HTTP_COOKIE=ISCOOKIE=true; LOGIN_USERNAME_COOKIE=rdanko; ORACLE_PLATFORM_REMEMBER_UN=RDANKO:ngrb; WWV_FLOW_USER2=70FBB00945FE46B9; V6_AUTHENTICATION_COOKIE=70FBB00945FE46B9
Authorization=
HTTP_IF_MODIFIED_SINCE=
HTTP_REFERER=http://castor:7778/pls/rbdev2_ax/f?p=147:500:6986070096861669560:::::
HTTP_SOAPACTION="theArrow",
It looks like whatever HTML you're including on your page is creating HTML input form elements inside the HTML form "wwv_flow". This form is posted to wwv_flow.accept, and of course, the PL/SQL procedure wwv_flow.accept doesn't know anything these additional arguments/form elements you're attempting to POST.
Joel -
Java Applet IIOP Call-In with Release 3C--How do we speed updownload ti
We have successfully implemented a simple Java Applet that calls into
Forte Services via IIOP. However, the duration of the download time for
Applet and its required class files is UNACCEPTABLE in a typical
INTERNET environment where 28.8K modems and multiple hops around the net
are not uncommon. We dialed into our network at 28.8K (but no hopping),
and found that download times varied from 1.5 - 2.0 minutes. This is
unacceptable, even by internet standards. We have been using the
Visigenic Visibroker product as the ORB.
After doing some investigation, we've come up with several ideas to
speed up download time:
1. Figure out how to use the Visigenic components (CORBA/IIOP class
files) that come bundled with the latest version of the Netscape
Navigator browser, so that they don't have to be downloaded
2. Figure out how to use ZIP files. Here's what I've read: "Since the
introduction of Netscape Navigator 3.0, you can specify an uncompressed
.zip file as an addition to the code base of your application. By
specifying a ZIP file, the browser will load your applet's classes from
a specified ZIP file before it searches the code base. This ZIP can
improve applet download time by reducing the number of HTTP connections
required to fetch applet code. As an added benefit, Netscape caches the
single ZIP file so that it will not reload your applet unless the date
of the ZIP file has changed."
3. Figure out how to use JAR files. Here's what I've read: "JAR
stands for Java archive. It's a file format based on the popular ZIP
file format and is used for aggregating many files into one. Although
JAR can be used as a general archiving tool, the primary motivation for
its development was so that Java applets and their requisite components
can be downloaded to a browser in a single HTTP transaction, rather than
opening a new connection for each piece. This greatly improves the
speed with which an applet can be loaded onto a web page and begin
functioning. The JAR format also supports compression, which reduces the
size of the file and improves download time still further."
Unfortunately, we've been unable to get any of these approaches to work.
Has any one used these or other approaches to speed up applet download
time? Or, does anyone know of consulting firms that specialize in this
sort of thing?
Thanks in advance for your help.
Mike Nelson, Project Leader
Metrix, Inc.
[email protected]
414-798-8560 x1157We have successfully implemented a simple Java Applet that calls into
Forte Services via IIOP. However, the duration of the download time for
Applet and its required class files is UNACCEPTABLE in a typical
INTERNET environment where 28.8K modems and multiple hops around the net
are not uncommon. We dialed into our network at 28.8K (but no hopping),
and found that download times varied from 1.5 - 2.0 minutes. This is
unacceptable, even by internet standards. We have been using the
Visigenic Visibroker product as the ORB.
After doing some investigation, we've come up with several ideas to
speed up download time:
1. Figure out how to use the Visigenic components (CORBA/IIOP class
files) that come bundled with the latest version of the Netscape
Navigator browser, so that they don't have to be downloaded
2. Figure out how to use ZIP files. Here's what I've read: "Since the
introduction of Netscape Navigator 3.0, you can specify an uncompressed
.zip file as an addition to the code base of your application. By
specifying a ZIP file, the browser will load your applet's classes from
a specified ZIP file before it searches the code base. This ZIP can
improve applet download time by reducing the number of HTTP connections
required to fetch applet code. As an added benefit, Netscape caches the
single ZIP file so that it will not reload your applet unless the date
of the ZIP file has changed."
3. Figure out how to use JAR files. Here's what I've read: "JAR
stands for Java archive. It's a file format based on the popular ZIP
file format and is used for aggregating many files into one. Although
JAR can be used as a general archiving tool, the primary motivation for
its development was so that Java applets and their requisite components
can be downloaded to a browser in a single HTTP transaction, rather than
opening a new connection for each piece. This greatly improves the
speed with which an applet can be loaded onto a web page and begin
functioning. The JAR format also supports compression, which reduces the
size of the file and improves download time still further."
Unfortunately, we've been unable to get any of these approaches to work.
Has any one used these or other approaches to speed up applet download
time? Or, does anyone know of consulting firms that specialize in this
sort of thing?
Thanks in advance for your help.
Mike Nelson, Project Leader
Metrix, Inc.
[email protected]
414-798-8560 x1157 -
Java Applet Not Loading In IE6 on XP
Can anyone assist I have a user who can not load a Java Applet on one of our web pages, I really need her to access this as it is important to her work. I have tried all the latest Java Versions to no avail. I have also tried adding SP1a to Windows XP to no avail. I am at a loss and it is stopping the user from working, can anyone help? Web site is Http:\\www.daimlerchryslerservices.co.uk/insurance
Below is a copy of the messages from the Java Console to tell you what is happening.
Thanks in Advance
Java(TM) Plug-in: Version 1.4.1_01
Using JRE version 1.4.1_01 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\schweizerc
Proxy Configuration: Automatic Proxy Configuration
URL: http://wpad.corpdcs.net:80/wpad.dat
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
java.io.IOException: Server returned HTTP response code: 407 for URL: http://www.daimlerchryslerservices.co.uk/insurance/TDAgent.jar
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.plugin.net.protocol.http.HttpUtils.followRedirects(Unknown Source)
at sun.plugin.cache.CachedJarLoader.download(Unknown Source)
at sun.plugin.cache.CachedJarLoader.load(Unknown Source)
at sun.plugin.cache.JarCache.get(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.<init>(Unknown Source)
at sun.misc.URLClassPath$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at sun.misc.URLClassPath.getResource(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
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)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
load: class ft3td/tdagent/TDAgentStub.class not found.
java.lang.ClassNotFoundException: ft3td.tdagent.TDAgentStub.class
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
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)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed.
at sun.applet.AppletClassLoader.getBytes(Unknown Source)
at sun.applet.AppletClassLoader.access$100(Unknown Source)
at sun.applet.AppletClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 11 moreI 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? -
I'm trying to run a Java applet with safari, but everytime I go to the webpage all I get is a grey box with a picture of a coffee cup that has two arrows circling it. Nothing loads after that. Any idea how to fix this?
Hi ad1054,
Are you sure you have java 1.6 and if so, how did you get it? I believe the latest version available from apple is 1.5.0_06. Java 1.6 was only just released by Sun, and, if I'm not mistaken, only for PC and Linux. Apple may be waiting to force people to pay for Leopard to get Java 1.6. (Though you can get a beta version from developer.apple.com.) As Hawaiian_Starman mentioned above, you can check your java version.
That said, you don't have to worry about lower versions of Java because Java is backwards compatible. In fact, if you use Firefox (sorry, but I just checked it in Safari, and got a blank page so I guess Safari, like IE, doesn't support this) and go to "about:plugins" you will see something like
<pre>
Java Embedding Plugin 0.9.5g2
File name: MRJPlugin.plugin
Runs Java applets using the latest installed versions of Java. For more information: Java Embedding Plugin. Run version test: Test Your JVM.
MIME Type Description Suffixes Enabled
application/x-java-vm Embedded JVM xjv Yes
application/x-java-applet Embedded Java Applet xja Yes
application/x-java-applet;version=1.1 Embedded Java Applet xja11 Yes
application/x-java-applet;version=1.1.1 Embedded Java Applet xja111 Yes
application/x-java-applet;version=1.1.2 Embedded Java Applet xja112 Yes
application/x-java-applet;version=1.1.3 Embedded Java Applet xja113 Yes
application/x-java-applet;version=1.2 Embedded Java Applet xja12 Yes
application/x-java-applet;version=1.2.1 Embedded Java Applet xja121 Yes
application/x-java-applet;version=1.2.2 Embedded Java Applet xja122 Yes
application/x-java-applet;version=1.3 Embedded Java Applet xja13 Yes
application/x-java-applet;version=1.3.1 Embedded Java Applet xja131 Yes
application/x-java-applet;version=1.4 Embedded Java Applet xja14 Yes
application/x-java-applet;version=1.4.1 Embedded Java Applet xja141 Yes
application/x-java-applet;version=1.4.2 Embedded Java Applet xja142 Yes
application/x-java-applet;version=1.5 Embedded Java Applet xja15 Yes
</pre>
You can see from this list that all versions up to and including the currently installed one are supported. The only thing you have to fear is that the applet you are trying to use was compiled with Java 1.6 and is not itself backwards compatible. However, when I made a test applet of this type, I got a red X, and no coffee cup.
If you see the red X, and I think the coffee cup as well, you should be able to right-click (or ctrl-click) the icon. If so, this will give you a menu with "console" and "about" choices. "About" will give you the version of Java you have, and "console" is supposed to show you the errors that kept the applet from working. (However, with my Java 1.6 test, the console was empty.)
I hope this helps.
1.5GB, 2.16 GHz Core Duo, 15.4" Macbook Pro Mac OS X (10.4.8) -
Re: [Fwd: Java Applet IIOP Call-In with Release 3C--How dowe speed up d
Hi Michael,
We have done exactly what you describe and have avoided the slow applet
download times. Although it can be a bit tricky, it is possible to use
the ORB bundled inside the Netscape 4.0 browser (Visibroker for Java by
Visigenic). Most of the code should follow Netscape's examples (on
http://developer.netscape.com)--just remember to initialize the ORB by
passing a reference to the current applet in orb_init() (so that you
invoke something like orb_init(this) [assuming you are extending
java.applet.Applet]). Pulling up the Java console within your web
browser should help debug quite a bit (a lot of debug messages will get
printed there the ORB is having problems).
Netscape has just implemented the applet caching schemes you describe,
so it probably shouldn't matter too much if you use another vendor's
ORB (we've done this with Iona's OrbixWeb). If you use ZIP files, they
have to be uncompressed, and I don't think that the browser will cache
them between browser sessions. Netscape 4.0 does seem to handle
compressed JAR files just fine and it does indeed cache them between
browser sessions. I'd go with the JAR format anyway since the ZIP
bundling was just a workaround until Sun got their act together in the
1.1 JDK.
By the way, you also might want to take advantage of the code-signing
and capabilities APIs of Netscape if you are going to invoke methods on
objects not resident on your web server. Otherwise, you will probably
run into the (in)famous browser applet security restrictions and you may
have other problems doing things like callbacks from Forte, etc.
If you want more detail on how it works, let me know and I can post some
examples.
Oh, one last thing: we are a consulting firm specializing in these kinds
of things :)
Bill
Subject: Java Applet IIOP Call-In with Release 3C--How do we speed up download time.
Date: Wed, 2 Jul 1997 09:10:31 -0500
From: Michael Nelson <[email protected]>
To: "'[email protected]'" <[email protected]>
We have successfully implemented a simple Java Applet that calls into
Forte Services via IIOP. However, the duration of the download time
for
Applet and its required class files is UNACCEPTABLE in a typical
INTERNET environment where 28.8K modems and multiple hops around the
net
are not uncommon. We dialed into our network at 28.8K (but no
hopping),
and found that download times varied from 1.5 - 2.0 minutes. This is
unacceptable, even by internet standards. We have been using the
Visigenic Visibroker product as the ORB.
After doing some investigation, we've come up with several ideas to
speed up download time:
1. Figure out how to use the Visigenic components (CORBA/IIOP class
files) that come bundled with the latest version of the Netscape
Navigator browser, so that they don't have to be downloaded
2. Figure out how to use ZIP files. Here's what I've read: "Since
the
introduction of Netscape Navigator 3.0, you can specify an
uncompressed
.zip file as an addition to the code base of your application. By
specifying a ZIP file, the browser will load your applet's classes
from
a specified ZIP file before it searches the code base. This ZIP can
improve applet download time by reducing the number of HTTP
connections
required to fetch applet code. As an added benefit, Netscape caches
the
single ZIP file so that it will not reload your applet unless the date
of the ZIP file has changed."
3. Figure out how to use JAR files. Here's what I've read: "JAR
stands for Java archive. It's a file format based on the popular ZIP
file format and is used for aggregating many files into one. Although
JAR can be used as a general archiving tool, the primary motivation
for
its development was so that Java applets and their requisite
components
can be downloaded to a browser in a single HTTP transaction, rather
than
opening a new connection for each piece. This greatly improves the
speed with which an applet can be loaded onto a web page and begin
functioning. The JAR format also supports compression, which reduces
the
size of the file and improves download time still further."
Unfortunately, we've been unable to get any of these approaches to
work.
Has any one used these or other approaches to speed up applet
download
time? Or, does anyone know of consulting firms that specialize in
this
sort of thing?
Thanks in advance for your help.
Mike Nelson, Project Leader
Metrix, Inc.
[email protected]
414-798-8560 x1157
Billy L. Williams, Jr. | email: [email protected]
Sage Solutions, Inc. | Tel: (415) 392-7243 (x506) Fax: (415) 391-3899
| Pager: (415) 605-1791 (page me if urgent)Hi Michael,
We have done exactly what you describe and have avoided the slow applet
download times. Although it can be a bit tricky, it is possible to use
the ORB bundled inside the Netscape 4.0 browser (Visibroker for Java by
Visigenic). Most of the code should follow Netscape's examples (on
http://developer.netscape.com)--just remember to initialize the ORB by
passing a reference to the current applet in orb_init() (so that you
invoke something like orb_init(this) [assuming you are extending
java.applet.Applet]). Pulling up the Java console within your web
browser should help debug quite a bit (a lot of debug messages will get
printed there the ORB is having problems).
Netscape has just implemented the applet caching schemes you describe,
so it probably shouldn't matter too much if you use another vendor's
ORB (we've done this with Iona's OrbixWeb). If you use ZIP files, they
have to be uncompressed, and I don't think that the browser will cache
them between browser sessions. Netscape 4.0 does seem to handle
compressed JAR files just fine and it does indeed cache them between
browser sessions. I'd go with the JAR format anyway since the ZIP
bundling was just a workaround until Sun got their act together in the
1.1 JDK.
By the way, you also might want to take advantage of the code-signing
and capabilities APIs of Netscape if you are going to invoke methods on
objects not resident on your web server. Otherwise, you will probably
run into the (in)famous browser applet security restrictions and you may
have other problems doing things like callbacks from Forte, etc.
If you want more detail on how it works, let me know and I can post some
examples.
Oh, one last thing: we are a consulting firm specializing in these kinds
of things :)
Bill
Subject: Java Applet IIOP Call-In with Release 3C--How do we speed up download time.
Date: Wed, 2 Jul 1997 09:10:31 -0500
From: Michael Nelson <[email protected]>
To: "'[email protected]'" <[email protected]>
We have successfully implemented a simple Java Applet that calls into
Forte Services via IIOP. However, the duration of the download time
for
Applet and its required class files is UNACCEPTABLE in a typical
INTERNET environment where 28.8K modems and multiple hops around the
net
are not uncommon. We dialed into our network at 28.8K (but no
hopping),
and found that download times varied from 1.5 - 2.0 minutes. This is
unacceptable, even by internet standards. We have been using the
Visigenic Visibroker product as the ORB.
After doing some investigation, we've come up with several ideas to
speed up download time:
1. Figure out how to use the Visigenic components (CORBA/IIOP class
files) that come bundled with the latest version of the Netscape
Navigator browser, so that they don't have to be downloaded
2. Figure out how to use ZIP files. Here's what I've read: "Since
the
introduction of Netscape Navigator 3.0, you can specify an
uncompressed
.zip file as an addition to the code base of your application. By
specifying a ZIP file, the browser will load your applet's classes
from
a specified ZIP file before it searches the code base. This ZIP can
improve applet download time by reducing the number of HTTP
connections
required to fetch applet code. As an added benefit, Netscape caches
the
single ZIP file so that it will not reload your applet unless the date
of the ZIP file has changed."
3. Figure out how to use JAR files. Here's what I've read: "JAR
stands for Java archive. It's a file format based on the popular ZIP
file format and is used for aggregating many files into one. Although
JAR can be used as a general archiving tool, the primary motivation
for
its development was so that Java applets and their requisite
components
can be downloaded to a browser in a single HTTP transaction, rather
than
opening a new connection for each piece. This greatly improves the
speed with which an applet can be loaded onto a web page and begin
functioning. The JAR format also supports compression, which reduces
the
size of the file and improves download time still further."
Unfortunately, we've been unable to get any of these approaches to
work.
Has any one used these or other approaches to speed up applet
download
time? Or, does anyone know of consulting firms that specialize in
this
sort of thing?
Thanks in advance for your help.
Mike Nelson, Project Leader
Metrix, Inc.
[email protected]
414-798-8560 x1157
Billy L. Williams, Jr. | email: [email protected]
Sage Solutions, Inc. | Tel: (415) 392-7243 (x506) Fax: (415) 391-3899
| Pager: (415) 605-1791 (page me if urgent) -
Safari 6.0.4 - java applet keeps running when not in use?
Mac OS X 10.7.5
Safari 6.0.4
all the latest updates (software) as of 4/27/13
Oracle's Java r 21 also installed (latest)
website: http://javatester.org/version.html
NOTE: I have seen this on more than 1 computer that the 1st time running the Java applet (after clicking on the plugin missing placeholder, the app appears to begin loading, but 'hangs' as far as UI is concerned, although it is using CPU and accessing the disk the whole time.
Refreshing the page then allows you to see the Oracle java version displayed in the pink box
However, what I notice is that if you enter a new URL and go there, blowing away the Java applet page, guess what's still running in the background (via Activity Monitor) "Java Applet - javatester.org", occupying memory and using some small CPU.
this seems like ridiculously bad behavior in general. Has anyone else seen similar issues? is this related to an outstanding memory leak (bigger problem) in Safari? Any way to get java to behave if you aren't possibly using an applet?
could it be lazy cleanup/garbage collection in Safari? meaning it might vanish from the process list at some indeterminate point in the future? closing the tab it was running on (before a new URL was loaded) outright doesn't seem to kill it.I have not used Onyx recently, although i use a number of other utils, and reset safari periodically.
It seems that it may be a delayed garbage collection issue. If I leave it for a bit and then come back it seems that the process is disappearing. If I can isolate anything more reliably I'll post again, but for now I'm going to stop worrying about it.
It was lingering long enough I thought maybe was a leak, but i guess I'm just not patient enough...
Also, I haven't reliably reproduced the high CPU cycle / hung applet condition on the 1st load. that may be something that shouldn't be going on (regarding the new security around java probably) but low pain point once I reload the page and tell safari to let the app run all the time.
so just to recap
- looks like the applet persistence in the process table is a delayed disposal issue that eventually gets done
- hanging applet on 1st load post security patch may be something, but hitting cmd-R is a lot more satisfying than devoting a lot of time to tracking that down right now
thanks for your suggestion -
Proxy Login Request on Java applets
• 10.4.5 Client
• Windows 2.3k ISA 2005 Proxy Server
• Users' fileserving to Win2.3k - ADmitMac for AD integration
The client is a test machine on which I build campus master NetInstall images. In my testing procedures I've come across a bizarre problem with Java in the browsers (IE, Safari, & FireFox).
We use ISA proxy server with web filtering, and users must authenticate to the proxy. On a new user's first use of any browser, the proxy username & password are requested, and the Add to Keychain checkbox is available. If the user checks the box, no further proxy login requests are made; the user's Keychain is updated with the proxy information.
On pages with Java applets, however, each and every applet will ask for a proxy login, but the login window does not offer a Add to Keychain checkbox! If a page has 15 applets on it, the user will be asked 15 times to authenticate against the proxy.
Naturally, this is a BIG problem, especially when several of the sites our teachers use in classes and labs contain many Java applets.
On the web, there is almost nothing concerning setting up Java with proxy servers, as all Apple Java from v. 1.4.2 onwards picks up proxy information from the system's network settings.
On the Apple Developer site, Tech Note QA1263 demonstrates a way of setting HTTPS proxy settings by entering text strings in the 1.3.1 and 1.4.1 Plugin Settings apps Java Runtime Parameters. The same capability exists in the J2SE 5.0 Java Preferences app, too. Unfortunately, the Java applets do not use HTTPS, so far as I can tell, so this remedy is useless.
Any clues I can pursue? Any help or fixes?
Thanks in advance!
Derek I Smith
Systems & Network Admin
Riverdale Country School
www.riverdale.edu
eMacs,g4s,QSs,B/Ws,iMacs,G5,G5 XServe, etc Mac OS X (10.4.5)After some more research with the J2SE 5.0 Java Preferences app, I turned on the Java console, booted Safari and went to my favorite Java applet - babynamewizard. This is the output of the console log. From what I can glean, the plug-in sees the proxy server settings as it should, and reports them.
In addition, the J2SE 5.0 Java Preferences app allows you to turn off all security settings. No change in behavior.
The Log:
Java Plug-in 1.5.0
Using JRE version 1.5.0_05 Java HotSpot(TM) Client VM
User home directory = /Users/admin
network: Loading user-defined proxy configuration ...
network: Done.
network: Loading proxy configuration from Netscape Navigator ...
network: Done.
network: Loading manual proxy configuration ...
network: Done.
network: Proxy Configuration: Manual Configuration
Proxy: http=pcproxy.riverdale.edu:8080,https=pcproxy.riverdale.edu:8080,ftp=pcproxy.ri verdale.edu:8080,gopher=pcproxy.riverdale.edu:8080,socks=pcproxy.riverdale.edu:8 080
Proxy Overrides:
basic: Cache is enabled
basic: Location: /Users/admin/Library/Caches/Java/cache/javapi/v1.0
basic: Maximum size: unlimited
basic: Compression level: 0
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
basic: Referencing classloader: sun.plugin.ClassLoaderInfo@fb6354, refcount=1
basic: Added progress listener: sun.plugin.util.GrayBoxPainter@dc0e7a
basic: Loading applet ...
basic: Initializing applet ...
basic: Starting applet ...
network: Connecting http://babynamewizard.com/namevoyager/nametide2.jar with proxy=HTTP @ pcproxy.riverdale.edu/172.16.1.52:8080
network: Connecting http://babynamewizard.com/namevoyager/nametide2.jar with cookie "s_cc=true; s_sq=%5B%5BB%5D%5D"
network: Firewall authentication: site=pcproxy.riverdale.edu/172.16.1.52:8080, protocol=http, prompt=ENKI.riverdale.edu, scheme=basic
basic: User selected: 0
~ ~ ~
The proxy login window appears at this point and I authenticate to the proxy
The log continues...
~ ~ ~
network: Connecting http://babynamewizard.com/namevoyager/nametide2.jar with proxy=HTTP @ pcproxy.riverdale.edu/172.16.1.52:8080
basic: Loading http://babynamewizard.com/namevoyager/nametide2.jar from cache
basic: No certificate info, this is unsigned JAR file.
network: Connecting http://babynamewizard.com/namevoyager/namedb.zip with proxy=HTTP @ pcproxy.riverdale.edu/172.16.1.52:8080
network: Connecting http://babynamewizard.com/namevoyager/namedb.zip with cookie "s_cc=true; s_sq=%5B%5BB%5D%5D"
Columns found: 28
Num years: 13
YEAR NAME: 1880s
YEAR NAME: 1890s
YEAR NAME: 1900s
YEAR NAME: 1910s
YEAR NAME: 1920s
YEAR NAME: 1930s
YEAR NAME: 1940s
YEAR NAME: 1950s
YEAR NAME: 1960s
YEAR NAME: 1970s
YEAR NAME: 1980s
YEAR NAME: 1990s
YEAR NAME: 2004
Num names: 5251
0 --> 923475.0
1 --> 915444.0
2 --> 905002.0
3 --> 910731.0
4 --> 915165.0
5 --> 924335.0
6 --> 938721.0
7 --> 940141.0
8 --> 923814.0
9 --> 869609.0
10 --> 848116.0
11 --> 800666.0
12 --> 759055.0
Rank misses: 21
0.15
0.4475
0.395
0.3425
0.29000002
0.23750001
0.185
0.48250002
0.43
0.3775
0.325
0.2725
0.22
0.1675
0.465
0.4125
0.36
0.3075
0.255
0.2025
~ ~ ~
The applet runs -
Very simple question here. Im very frustrated with this simple java applet right now. Will this applet at this URL display for anyone?? http://www.everythingsgood.com/Computer/IntegerCalculatorGUI.html I have been reading Java applet tutorial sites for the past 6 hours and all of them tell me the same thing. All I need is this tag
<APPLET height="150" alt="Browser has Java disabled" hspace="150" width="450" code="IntegerCalculatorGUI.class"></applet>
along with having the .html file in the same directory as the java.class. I have done everything excalty as described by many people and this thing still pulls up a empty box with a red X in it. What am I doing wrong? Anyone have any ideas. This is really frustrating since im 99% positive the html tag is perfect. If you want to view the calculator applet code here it is http://www.everythingsgood.com/Computer/classes.rar I have also tried to use a .jar but with no effect as well.
Message was edited by:
venture
nullJava Plug-in 1.5.0_11
Using JRE version 1.5.0_11 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\Jake.VENTURE
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Media Fully Loaded
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
load: class IntegerCalculatorGUI.class not found.
java.lang.ClassNotFoundException: IntegerCalculatorGUI.class
at sun.applet.AppletClassLoader.findClass(Unknown Source)
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)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.FileNotFoundException: C:\Documents and Settings\Jake.VENTURE\Application Data\Ipswitch\WS_FTP\Storage\IntegerCalculatorGUI\class.class (The system cannot find the path specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
at sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source)
at sun.applet.AppletClassLoader.getBytes(Unknown Source)
at sun.applet.AppletClassLoader.access$100(Unknown Source)
at sun.applet.AppletClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 10 more
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.ClassCastException: IntegerCalculatorPanel
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
load: IntegerCalculator.class can't be instantiated.
java.lang.InstantiationException: IntegerCalculator
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
load: class NervousText.class not found.
java.lang.ClassNotFoundException: NervousText.class
at sun.applet.AppletClassLoader.findClass(Unknown Source)
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)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed.
at sun.applet.AppletClassLoader.getBytes(Unknown Source)
at sun.applet.AppletClassLoader.access$100(Unknown Source)
at sun.applet.AppletClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 10 more
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.ClassCastException: IntegerCalculatorGUI
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Im really not sure what to make of all of it.
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