JNLP and JRE versions...

I have a machine with JDK 1.2.2 and Java Web Start 1.0.1 (update package). I am accessing an app. that runs on JRE 1.3, but I cannot update to 1.3 yet due to other application dependencies. Is there a way that the downloaded app. can be packaged in such a way that it brings in JRE 1.3 in its JARs and uses it from the JAR, leaving my system at JRE 1.2.2 level?
Thanks!

A jre is a lot more than the jars it loads. You can't run an application under 1.2.2 VM using 1.3 classfiles.
You can install some later versions of the JRE "privately". a private installed jre will not become the default on the system, but can be configured to be used in java web start applications.
/Dietz

Similar Messages

Mismatch of JDK and JRE versions cause screen freeze for applications ?

Hi,
My Java swing application is built on jdk1.3.1_17 in server. It was working fine without any issue when I use Java webstart 1.0.1 to download the client part of the application and JRE 1.3.1_10 to run the application from my local desktop.
For better performance, I upgraded my local desktop to 1.4.2_07 version of JRE and same version of java Web start 2 months before. From that day, I am facing a "Screen freeze" issue in my application. It means, while working on the application, the application screen goes blank or White screen. This issue may come while doing any activity all of a sudden , there is no pattern found.
Is there any reason like incompatibility of lower JDK version and higher JRE/JWS versions could have caused this issue ? Any Idea plz
Thanks in advance
David

I'm using a 15" Macbook Pro with Retina Display. The applications I have are Indesign, Illustrator, and Photoshop. Over a period of time, using these programs will make the screen turn blank. Sometimes, the screen turns a solid color and it just happens to be what ever color I've been using with the Color picker tool.
I don't know for sure what it could be. I tried checking Disk Utility (one problem was solve, but blank screen wasn't fixed).
I have to force reboot only to be faced with another blank screen. I either keep trying or keep cmd+opt+p+r until the screen boots back to normal. (This is probably due to the programs not shutting down properly when the laptop blank screens)

Mac OS 10.4.8 , Java Web Start and JRE version of 1.4.2 and 1.5.0 problem

Hello,
I've been searching internet and reading the problems related to Java Web Start and JNLP.
But no solution I read can solve what I faced.
I'm running Mac OS x 10.4.8 and Macintosh updates the Java in my machine so that it has Java version 1.4.2 and Java 1.5.0
The application I'm running needs to be running in JRE 1.4.2.
So I changed the Java Preferences so that the default Java setting is JRE 1.4.2. However, the JNLP application still running in Java 1.5.0
So I changed the MIME and make sure the JNLP is opened with Java Web start instead. The Java Web start is for version 1.4.2. I also change its preference so that the console is opened.
I tried to run the JNLP application once again. Java web start 1.4.2_09 starts and console open, but the Java Runtime is still showing Java 1.5.0
I adjust the JNLP file so that the version is only showing 1.4.2_09 (ignoring all other variables of version 1.4.1, 1.4.2, etc found in the original JNLP file). That didn't work either.
I search on methods on how to uninstall Java 1.5.0 in Mac - apple page told me that I can't do that unless I reinstall the whole OS.
I am henceforth declare that I am stuck now !!!! Heellllpp....

Are you up to date with the updates?
Update for Snow Leopard users:
Apple issued update 12 for Java for OS 10.6:
http://support.apple.com/kb/DL1573
Note: On systems that have not already installed Java for Mac OS X 10.6 update 9 or later, this update will configure web browsers to not automatically run Java applets. Java applets may be re-enabled by clicking the region labeled "Inactive plug-in" on a web page. If no applets have been run for an extended period of time, the Java web plug-in will deactivate.
If, after installing Java for OS X 2013-002 and the latest version of Java 7 from Oracle, you want to disable Java 7 and re-enable the Apple-provided Java SE 6 web plug-in and Web Start functionality, follow these steps:
http://support.apple.com/kb/HT5559?viewlocale=en_US
Further update:
Apple issued this Java related security update No. 13 on February 19:
http://support.apple.com/kb/HT5666
and Update No. 14 on March 4: http://support.apple.com/kb/DL1573
http://support.apple.com/kb/HT5677
The standard recommendation is for users to turn off Java except when they have to use it on known and trusted websites (like their bank). Javascript, which is unrelated despite the name, can be left on.

Servlet/Applet Communication and JRE Version

Hey all,
I have an applet that sends objects back and forth to a servlet. I have heard that there can be issues if the applet and servlet are run under different versions of java, and right now, the applet works from some machines but not others (I've only tested on PCs so far). I posted a question similar to this a month or two ago, and someone suggested I use UIDs. Can anyone give me some detailed information on how I would do this, or something similar to ensure that any version of Java on someone's machine will work ok, or a link to some helpful info? Thanks.

Thanks mchan0! I think this will be very helpful.

JDK and JRE comptability for Windows server 2008

Hi,
Could someone please let me know what are the JDK and JRE versions that are comptabile with Windows server 2008 ?
Thanks.

Hi,
For security purposes, the IP address for the Windows Update web site constantly changes and it is not a fixed address. Also, there is no official publication of the
IP addresses. We normally advise against defining IP addresses on the firewall for this purpose. Instead, we suggest either allowing all outbound connections to http & https ports or defining the DNS addresses as permitted destinations for traffic via
the firewall.
For up-to-date information about the IP's being used by Windows Update, use the DNS system, as this is the only reliable up to date source of information. If you use
DNS, make sure the following destination hosts are specified:
http://windowsupdate.microsoft.com
http://*.windowsupdate.microsoft.com
https://*.windowsupdate.microsoft.com
http://*.update.microsoft.com
https://*.update.microsoft.com
http://*.windowsupdate.com
http://download.windowsupdate.com
http://download.microsoft.com
http://*.download.windowsupdate.com
http://wustat.windows.com
http://ntservicepack.microsoft.com
http://stats.microsoft.com
https://stats.microsoft.com
Thanks for your understanding.
Best Regards,
Nina
This posting is provided "AS IS" with no warranties, and confers no rights.

Problem selecting the right jre version with jnlp

I am using Webstart 1.4.2.
When instaling, it correctly found 2 jre versions on my system, 1.4.1_03 and 1.4.2.
Because our application currently is not working with 1.4.2 I need to force webstart to use 1.4.1_03.
I tried to set the tag <j2se version="1.4.1_03"
When loading from the websever I get a "Error Code 11 (11 Could not locate requested version) "...same if I explicitly set to 1.4.2.
I suspect that webstart is checking the "platform version" which are set for both to 1.4 and not the "product version" (see java preferences in webstart).
Does somebody know if there is another jnlp tag I can use to force a specific version? or any other workaround.
In my opinion this is a bug webstart should check the product version
Thanks Marc

had the same problem...
ad the url and try again:
<resources>
<j2se version="1.4.1_03" href="http://java.sun.com/products/autodl/j2se"/>
<jar href="...
as far as I now are not all JRE's available for autodownload.
Good luck!

I have been getting java.lang.ClassNotFoundException: ZeroApplet.class and java.lang.ClassNotFoundException: JavaToJS.class crashes with JRE version 1.6.0_26-b03-384-10M3425 VM executing a Java Applet. Is Apple aware of this problem? No longer supported?

My web page uses a Java Applet to allow my visitors to replay chess games; the Chess Viewer Deluxe applet was written by Nikolai Pilafov some time ago and has been working properly for some time (until recently). I don't monitor this part of my site regularly so I am not sure when it began to fail. On his web site [http://chesstuff.blogspot.com/2008/11/chess-viewer-deluxe.html] he has a link to check LiveConnect object functionality (which fails for OBJECT tags). His recommendation is to "seek platform specific support which might be available from the JRE developers for your platform".
I have been getting java.lang.ClassNotFoundException: ZeroApplet.class and java.lang.ClassNotFoundException: JavaToJS.class crashes with JRE version 1.6.0_26-b03-384-10M3425 VM executing a Java Applet. Until I checked the LiveConnect object functionality, I was unable to identify the source of the console error messages. This does seem to be the smoking gun.
Is Apple aware of this problem? Are these classes no longer supported? Has anyone else had this problem? You can attempt to recreate the problem locally by going to my web page: http://donsmallidge.com/DonSmallidgeChess.html
Thanks in advance for any help you can provide!
Abbreviated Java Console output:
Java Plug-in 1.6.0_26
Using JRE version 1.6.0_26-b03-384-10M3425 Java HotSpot(TM) 64-Bit Server VM
load: class ZeroApplet.class not found.
java.lang.ClassNotFoundException: ZeroApplet.class
    at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:211)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:144)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:662)
    at sun.applet.AppletPanel.createApplet(AppletPanel.java:807)
    at sun.plugin.AppletViewer.createApplet(AppletViewer.java:2389)
    at sun.applet.AppletPanel.runLoader(AppletPanel.java:714)
    at sun.applet.AppletPanel.run(AppletPanel.java:368)
    at java.lang.Thread.run(Thread.java:680)
load: class JavaToJS.class not found.
java.lang.ClassNotFoundException: JavaToJS.class
    at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:211)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:144)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:662)
    at sun.applet.AppletPanel.createApplet(AppletPanel.java:807)
    at sun.plugin.AppletViewer.createApplet(AppletViewer.java:2389)
    at sun.applet.AppletPanel.runLoader(AppletPanel.java:714)
    at sun.applet.AppletPanel.run(AppletPanel.java:368)
    at java.lang.Thread.run(Thread.java:680)

I just went up to check the LiveConnect object functionality page AND IT WORKED THIS TIME! I must confess, this is very mysterious. I will do some more checking and reply here if I can determine why it is working now (and more importantly, why it didn't work before).

Use 2 jre versions (Java 5.x and Java 6.x) on diferent web pages.

On windows XP SP3.
I need use on internet explorer 7 and firefox 3, 2 differents JRE versions for two diferent servers
example:
- "www.site1.com" needs java 5.x (don't work with java 6.x)
- "www.site2.com" needs java 6.x (don't work with java 5.x)
If i have installed both versions, internet explorer and firefox even uses java 6.x, and i only can use java 5.x if uninstall java 6.x
I need use to default use: java 6.x; except for "www.site1.com" that i need use java 5.x
How can use both JRE versions?

Questions: Do you plan to use the same web browser? The earlier applet running on JRE 1.5.x cannot run on 1.6 ? Sun puts forth a lot of effort in attempt to ensure that applets are forwards compatible.

JRE versions and Browsers and Applets

Is there a way to assign a particular JRE version to a browser session through JavaScript or VBScript programatically so that I can run applets from different sources which need different JREs?
Basically I will have 2 links/buttons which will call two separate javascript methods to open two different browser windows to run two different applets running under different JREs
However when I start IE each 'session' of IE is assigned to one JRE, any way to overcome this?
TIA,
Raj

Martin thanks for your inputs
I am sourcing html pages from multiple sites and the html/applet tag is generated by those websites.
They do have the applet tag pointing to proper class-id of the java plugin.
However, the problem is with IE one family(session) of browsers are attached to one version of JRE plugin.
Here 'session' means: you open a browser and from within that browser you do go from a link or javascript etc. to another browser they are in same 'session'
I am working on dynamically setting JRE plugin version to different browsers.
Not sure I made it clear or confusing : )
Thanks

How to find the jre and j2ee version on RAD?

How to find the jre and j2ee version of RAD 6.0?

Hi Zhenglin,
You meen to say we have to create two custom fields, one each for the latitude and longituude. Once created, how do we upload the latitude and longitude based on address could you please expalin by giving some sample code.
Thanks in advance.
Thanks and regards,
Deepika C

J2EE and related J2SE/JRE versions

I understand the difference between J2EE and J2SE/SDK/JDK, and JRE. However, I'm having trouble identifying what version of SDK each of the J2EE versions uses. Maybe they match up.
For example, if I have an old project someone says was built with J2EE 1.3 SDK, does that use J2SE/JRE 1.3? Does Java EE 5 use Java 1.5? 1.6? 1.4? (For example, if I'm setting Eclipse Compiler Compliance Level for a J2EE 1.3 project, what should it be?)

is there a way for me to know what Java version that would have been or could have been compiled against?No.
Edit: Slight clarification - the class files in the application contain a magic number that corresponds with the compiler target - so for any given class file you can determine what JRE was targeted at compile time. This can be different from the compiler version. Different classes in the same application may have been targeted to different JRE versions.
Are there any versions of Java that it could not be compiled against?No.
what version of Java does the Application Server on which this will be deployed support.The Application Server will be running on a JRE corresponding to a particular Java release. That JRE will support all versions of Java prior to the release. Code compiled on subsequent versions of Java can, if suitably written, be targeted to run on that version of the JRE and (depending on versions) may not need specific targeting to do so. Whether they in fact work or not depends entirely on what library calls they make.
What's the business requirement that drives this request?
Edited by: dcminter on 03-Mar-2010 18:54

No jre version found in launch file

I'm using jdk1.5.0_03 (with all other versions of java removed from my system) and trying to run our web start app that specifies a version of 1.4.2*. After clicking the link to the jnlp file, web start contacts sun to retrieve 1.4.2*, then gives the dialog: "unable to launch FlowJo" (our app). On the details tab, it reports: "No JRE version found in launch file for this system".
When I launch the web start manager, under the user applications tab, I see 3 applications: our app, our installer, and Sun's j2re1.4.2_07 installer. It seems like Sun's installer is being downloaded but never executed.
Am I doing something wrong in my jnlp files? Both our app jnlp and our installer jnlp specify a j2se version of 1.4.2*. Below are the files and exception as reported from the web start dialog. I'm trying to set our app up for internal testing with web start, so I'm using a local ip. Our application uses a custom installer which has its own jnlp file (shown below in "launch file").
Any help is much appreciated,
Peter
Launch File:
<?xml version="1.0" encoding="utf-8"?>
<jnlp codebase="http://192.168.1.33/flowjo/current/installer/">
<information>
<title>FlowJo Installer</title>
<vendor>Tree Star, Inc.</vendor>
<homepage href="http://www.flowjo.com"/>
<icon href="images/logo2fin.gif"/>
<offline-allowed/>
</information>
<security>
<all-permissions/>
</security>
<resources os="Windows" arch="x86">
<j2se version="1.4.2*" maximum-heap-size="512m" href="http://java.sun.com/products/autodl/j2se" />
<jar href="http://192.168.1.33/flowjo/current/installer//installer.jar" />
</resources>
<installer-desc main-class="com.treestar.flowjo.install.JNLPInstaller"/></jnlp>
Main launch file:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp codebase="http://192.168.1.33/flowjo/current/flowjo/">
<information>
<title>Flowjo </title>
<vendor>Tree Star, Inc.</vendor>
<icon href="images/logo2fin.gif"/>
<offline-allowed/>
<shortcut online="false">
<desktop/>
<menu submenu="Flowjo "/>
</shortcut>
<association extensions="wsp" mime-type="x-application/wsp"/>
<association extensions="wspt" mime-type="x-application/wspt"/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.4.2*" initial-heap-size="128M" max-heap-size="512M" href="http://java.sun.com/products/autodl/j2se" />
<jar href="flowjo.jar" />
<jar href="resources.jar" />
<extension name="FlowJo Installer" href="http://192.168.1.33/flowjo/current/installer/installer.jnlp"/>
</resources>
<resources os="Windows">
<nativelib href="http://192.168.1.33/flowjo/current/lib/FlowJoEngine.DLL.jar"/>
</resources> <application-desc main-class="com.treestar.flowjo.Main" />
</jnlp>
Exception:
JNLPException[category: Launch File Error : Exception: null : LaunchDesc:
<jnlp spec="1.0+" codebase="http://192.168.1.33/flowjo/current/installer/">
<information>
    <title>FlowJo Installer</title>
    <vendor>Tree Star, Inc.</vendor>
    <homepage href="http://www.flowjo.com"/>
    <icon href="http://192.168.1.33/flowjo/current/installer/images/logo2fin.gif" kind="default"/>
    <offline-allowed/>
</information>
<security>
    <all-permissions/>
</security>
<resources>
    <j2se href="http://java.sun.com/products/autodl/j2se" version="1.4.2*"/>
    <jar href="http://192.168.1.33/flowjo/current/installer//installer.jar" download="eager" main="false"/>
</resources>
<installer-desc main-class="com.treestar.flowjo.install.JNLPInstaller"/>
</jnlp> ]
     at com.sun.javaws.Launcher.executeInstallers(Unknown Source)
     at com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)
     at com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)
     at com.sun.javaws.Launcher.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)

The use of an earlier jre in the resource tag does no
good:
<resources>
<j2se version="1.4.1" />
Still gives the same error;
JNLPException[category: Launch File Error : Exception: null : LaunchDesc:
<jnlp spec="1.0+" codebase="http://show.docjava.com:8086/book/cgij/code/jnlp/" href="http://show.docjava.com:8086/book/cgij/code/jnlp/bookExamples.ch44Printing.cdLabel.CdLabelPrinterMain.jnlp/">
<information>
    <title>Experimental Labeler</title>
    <vendor>DocJava, Inc.</vendor>
    <homepage href="http://www.docjava.com"/>
    <description>CD Label Printer
     </description>
    <description kind="short">
      Printer
</description>
    <description kind="one-line">CD Label Printer
     </description>
    <description kind="tooltip">CD Label Printer
     </description>
    <icon href="http://show.docjava.com:8086/consulti/docjava.jpe" kind="default"/>
</information>
<application-desc main-class="bookExamples.ch44Printing.cdLabel.CdLabelPrinterMain"/>
</jnlp> ]
     at com.sun.javaws.Launcher.handleLaunchFile(Launcher.java:186)
     at com.sun.javaws.Launcher.run(Launcher.java:167)
     at java.lang.Thread.run(Thread.java:552)
Can someone please help?
Thanks!
- DL

No JRE version found in launch file for this system

Hi,
I have an application which is launched by JWS.
When we use JWS from 1.4, it runs fine. But JWS from 1.5.0_15 gives the error "No JRE version found in launch file for this system"
In both the JWS(1.4 and 1.5.0_15)cases, we install JRE1.5.0_15 using the installer and used for invoking the application.
We invoke mailclient.jnlp, which inturn invokes the installer.jnlp and KanaJreInstaller.asp
<<mailclient.jnlp>>
<?xml version="1.0" encoding="utf-8"?>
<jnlp
spec="1.0"
codebase="http://mpshanmu-gx520:80/10r3/"
href="mailclient.jnlp">
<information>
<title>KANA Agent</title>
<vendor>KANA Software, Inc.</vendor>
<homepage href="http://www.kana.com"/>
<description>KANA Suite 10.3.0</description>
<icon href="images/mail_logo.gif"/>
<offline-allowed/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="KANA1.5.0_15" href="KanaJreInstaller.asp"/>
<jar href="lib/mailclient_s.jar"/>
<jar href="lib/link_s.jar"/>
<jar href="lib/spell_s.jar"/>
<jar href="lib/ssce_s.jar"/>
<jar href="lib/kc_framework_s.jar"/>
<jar href="lib/kc_sharedGUI_s.jar"/>
<jar href="lib/xalan_s.jar"/>
<jar href="lib/xerces_s.jar"/>
<jar href="lib/java2com_s.jar"/>
<jar href="lib/jgl3.1.0_s.jar"/>
<jar href="lib/rsrcbundle_s.jar"/>
<jar href="lib/response_s.jar"/>
<jar href="lib/HTMLEditorEnterprise_s.jar"/>
<jar href="lib/jakarta-oro-2.0.4_s.jar"/>
<jar href="lib/jdic_s.jar"/>
<extension name="Sun Libraries" href="sunextensions.jnlp"/>
</resources>
<resources os="Windows">
<nativelib href="lib/windlls_s.jar"/>
<nativelib href="lib/jdic-native.jar"/>
</resources>
<application-desc main-class="kana.mail.wkstn.AppMain">
<argument>-serverlist</argument>
<argument>http://mpshanmu-gx520:80/10r3/servers.xml</argument>
</application-desc>
</jnlp>
<<KanaJreInstaller.asp>>
<%@ language="vbscript"%>
<%
Response.ContentType="application/x-java-jnlp-file"
Response.AddHeader "x-java-jnlp-version-id","KANA1.5.0_15"
dim fs,f,ts
set fs=Server.CreateObject("Scripting.FileSystemObject")
Set f=fs.GetFile("C:\Program Files\KANA\KANA Response Web Server_10r3\installer.jnlp")
Set ts=f.OpenAsTextStream(1)
Response.Write(ts.ReadAll)
ts.Close
set ts=nothing
set f=nothing
set fs=nothing
%>
<<installer.jnlp>>
<?xml version="1.0" encoding="utf-8"?>
<jnlp
spec="1.0"
codebase="http://mpshanmu-gx520:80/10r3/"
href="installer.jnlp">
<information><title>KANA J2RE 1.5.0_15 Installer</title>
<vendor>KANA Software, Inc.</vendor>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.3+"/>
<jar href="lib/installer.jar"/>
<jar href="lib/JRE_KANA1.5.0_15.jar"/>
<property name="jre.container" value="JRE_KANA1.5.0_15.jar"/>
<property name="jre.execute" value="bin\\javaw.exe"/>
<property name="jre.version" value="KANA1.5.0_15"/>
</resources>
<installer-desc main-class="JREInstaller"/>
</jnlp>
Thanks

>
We are using sun JRE(1.5.0_15) only. We extract Sun JRE and build it as KANAJRE.jar and signing.>I have never heard of KANAJRE. Would you care to post a link to the site, or should we just keep guessing? (My patience for random guesses is running out.)
>
We install using Intaller class and that is getting listed in the Java Control panel and enabled too.>List as what?
Does it list it with the entire string "KANA1.5.0_15" or is is just listed as "1.5.0_15"?
Because this line from the JNLP file..
<j2se version="KANA1.5.0_15" href="KanaJreInstaller.asp"/>..had me convinved it was a non-Sun JRE. Not so much the href, but most especially the version attribute.
If it really is the Sun JRE, I would expect this to work.
<j2se version="1.5.0_15" href="KanaJreInstaller.asp"/>And as an aside. If this installer is giving you trouble and the app. requires the 1.5.0_15 JRE, why not simply the default Sun JRE installer? What advantages do you think this installer offers?

All jre versions now available for autodl.

A new jre autodownload servlet has now been put in production by Sun that can serve to java web start (and also the new OOPP plugin in 6u10) any veresion of the jre (from 1.4.2 on)
/Andy

When we use the following syntax in the JNLP file, an exception message of "Unable to launch 1.6...installer" is displayed.
{color:#339966}<j2se version="1.6+" initial-heap-size="64m" max-heap-size="128m"/>
{color}{color:#000000}Not too long ago, Java Web Start successfully retrieved the most recent 1.6 installer if the JRE version on the target system was under 1.6.
What has changed?{color}
Edited by: kcchristoph on Jun 6, 2008 3:10 PM

No jre version found in launch file error

I am trying to launch an application using jre 1.6.0_04 and get the error< "no JRE version found in launch file for this system"
i do have the proper jre installed

post the jnlp file and forum can see what the syntax errors are.
/Andy

JNLP and JRE versions...

Similar Messages

Maybe you are looking for