Java Web Start and the Mac OS

I am new to the Mac OS and to Java Web Start. Using Java Web Start to launch a Java application on the Mac is discussed in several of the posts here. However, in the requirement section of the Overview for Java Web Start says
"Requirements
Desktop/Client requirements:
The client machine requires support for the Java Runtime Environment (JRE), version 1.3 or later. Java Web Start is available for Windows 98/NT/2000/ME/XP, the Solaris Operating Environment, and Linux."
As you can see, Mac OS is not mentioned. Yet Java Web Start exists on my Mac. Am I looking at the wrong documentation? The document is located at
http://java.sun.com/javase/6/docs/technotes/guides/javaws/developersguide/overview.html#jws
I don't know how to use Java Web Start . I don't even know where to look for help. If anyone would care to offer some help it would be greatly appreciated.

You are looking in the right place alright. The reason OSX is not mentioned in the document (or, by extend, any of the official sun documents) is that sun does not (may not?) provide an official java release on OSX. Java on OSX is implemented by Apple (and much to the dismay of both users and developers, they are not doing a very good job). Still, Apple's java usually fulfills the same specifications as the official sun java, so you can take any one of sun's documents on webstart or any other technology and it will usually work on the Mac. You just can't expect sun to assure that a technology will work on a platform they have no control over...

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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.

Java Web Start and DeployDirector: What's the difference?

I am the product manager for DeployDirector at Sitraka (now part of Quest Software). I'm NOT in sales; I'd simply like to provide you with some information.
From talking with DeployDirector users and evaluators, and from my own discussions with the folks at Sun, I have discovered that there is great deal of confusion about the difference between Java Web Start and DeployDirector. I'd like to clarify this by periodically posting some information about the two.
Though the products seem similar in concept, they are designed for different purposes. They both deploy, auto-update and manage the JRE for client-side Java applications, but beyond that, they are quite different.
Java Web Start is ideally designed for applications deployed over the Internet, where application-provider trust is an issue. Why? The security sandbox guarantees that application can do no harm. (There's some good information about Java Web Start and sandbox apps on ScheduleWorld at http://www.scheduleworld.com/itsYourLife.html) Web Start's architecture simply consists of a client piece that interprets a JNLP file. Because of the sandbox and its simplicity, I believe JWS is best used for independent software vendors, independent developers, etc.
Because DeployDirector is ideally designed for internal enterprise applications, it does not enforce the security sandbox. Trust is not an issue here, because internal users typically trust their internal IT group. DeployDirector's architecture consists of both a client and a server piece, which allows us to support more complex deployment and update scenarios (e.g., scheduled and optional updates) and applications management capabilities like rollback, reporting, exception monitoring, authentication/authorization out of the box. All of this is configured through the DeployDirector administration console.
In some situations, DeployDirector may be unnecessary overhead. In other situations, Java Web Start simply does not provide enough capability and building in this into Web Start can be difficult.
If you'd like more information, we have whitepapers and case studies (including one specifically about DeployDirector and JWS) available on our website at http://www.sitraka.com/software/deploydirector/
If you'd like to discuss some of these differences, or if you have questions about DeployDirector, feel free to email me directly. (Or post here, of course.)
Thanks,
Sonal Champsee
[email protected]

Hi Gerald,
Given what I know about your emnity towards DeployDirector (which is clearly illustrated in this thread: http://forum.java.sun.com/thread.jsp?thread=348061&forum=38&message=1446155 that was evidently a response to this article: http://www.javaworld.com/javaworld/jw-11-2002/jw-1122-autoupdate.html) I'm going to take a (pardon the expression) "don't feed the trolls" approach here.
I'm simply re-iterate that JNLP, and its implementations such as Web Start and OpenJNLP, are designed for a very different set of users that DeployDirector. The differences in functionality between the two products reflect that.
The enterprise has different requirements in a deployment mechanism for its internal, critical applications than software vendors and independant developers. DeployDirector addresses the requirements of the enterprise. Frankly, most of our recent customers only chose to buy the product after initially rejecting it and (unsucessfully) attempting to use JNLP and Web Start. Sometimes people only learn the hard way: different users have different requirements which are suited to different tools or technologies.
Sonal

Java Web Start and C++ executable

Can anyone please help me to deploy an application including three C++ executables using Java Web Start?
I packaged each .exe file into .jar and created a java program called "ExecTest" that attempt to launch the .exe by calling Runtime.exec (someapp.exe).
My JNLP file looks like:
<resources>
<jar href="app/someapp.jar"/>
<jar href="ExecTest.jar" />
</resources>
<application-desc main-class="ExecTest">
The problem I am having is that Runtime.exec wants the full absolute pathname for the executables. But the cached jar files all have some arbitrary letters prefixed, so I cannot specify them beforehand.
Any ideas?
Thanks in advance.
Suh from Toronto. (Go! Leafs Go!)

I've deployed serialio.com's replacement for javax.comm via Java Web Start, and I managed to package the .dll in a .jar without any difficulties.
Perhaps the System.loadLibrary() function knows about the renaming that Java Web Start does...
If so, then the following might do the trick:
- Use System.loadLibrary() to load your .exe file. Windows uses the same fileformat for DLLs and EXE files, and hence System.loadLibrary() should be a safe no-op. Presumably you are
- Use System.mapLibraryName() to find the full path to your .exe.
�yvind

Java Web Start and JNLP Problem

Hi !
I�m a student and i need your help for a work that i have to do.
I have an aplication that parse an XML file.
The XML file is in ther server, and when i run the aplication with Java Web
Start and jnlp file i want that the application parse a XML file.
is this possible??? how can i do ???
if you dont understand please warn me, that i try to explain better..
thanks, in advance.
Rui Silva , Portugal

I'm not sure that you need webstart.
Just an applet will allow you to read a file from the server:
Just open a URL pointing to the .xml file.
Read the file into a buffer and then parse it.
Now actually getting the applet to do something with the contents of the .xml file
is more complicated. Presumably you need to write something which understands the
contents of the .xml and does something in response to the contents.
A signed java program can be run from with in webstart which can spawn processes on
the local machine. os.systemExec("command a b c"); But of course that has cross platform
problems.
Good luck

Java Web Start and Java Preferences

I am having trouble with Java Web Start and Java Preferences. I have tried reinstalling the update with the link http://www.apple.com/downloads/macosx/apple/application_updates/javaformacosx105 update6.html but to no avail. What else can be done ? Moreover the file /System/Library/Frameworks/JavaVM.framework/Versions/A/ seems to be in place, but Java Web Start wont open and Java Preferences can't access cache files. Any ideas about how to resolve this? I have been having issues with Java for a long time and have already done a clean Leopard reinstall and all the Combo updates. Java Web Start and Java Preferences worked correctly for a while after that but seem to have gone haywire again.

bump

Java Web Start and pack200

Hi!
What do I have to do to deploy my jar-archives that are packed with pack200? Do I have to change the jnlp files? Do I have to change any server settings?
At the moment I successfully deploy our software using Java Web Start and simple jar files. If I pack with pack200 the archives shrink to 1/4 of the original size. That is nice, but when I put the xxx.jar.pack.gz files on our web server they are ignored by Java Web Start. Explicitly use the xxx.jar.pack.gz files in the jar arguments of the jnlp file doesn't work either (because JWS expects .jar archives there it tells me that the archives are corrupted).
I figure that I have to change either the jnlp file, the server settings or the JWS clients settings.
In another posting I have read that JWS in its normal configuration does not support pack200 at all. Is that correct? Or is there a straight-forward documentation how to use JWS with pack200?
Thanks in advance,
Chris,
Hamburg

Either the JWS plugin should try to request the "xxx.jar.pack.gz" file when it finds a "xxx.jar" reference in the jnlp file.No. You always request jar files, but the Accepted-Ecnoding can differ. If omitted or empty the server should send back the contents of the jar, if it's "gzip" than the stuff of the jar.gz (Content-Encoding: gzip) and if it "pack200-gzip" the stuff of the jar.pack.gz (Content-Encoding: pack200-gzip).
The diagrams shown here make it pretty obvious:
http://java.sun.com/j2se/1.5.0/docs/guide/deployment/deployment-guide/pack200.html
So... you need some server sided logic for handling that. If you can run servlets - great... just use Sun's example. If you can't, you'll need something else like apache's mod_rewrite and a php script.
mod_rewrite is used for redirecting requests server sided. For example:
http://onyx.bubblegumcrises.jp/jnlp/downloads/fake.jar [no real url]
becomes:
http://onyx.bubblegumcrises.jp/jnlp/jarbounce.php?file=fake.jar (internally) [no real url]
by rewriting like this(jnlp/.htaccess):
RewriteEngine On
RewriteBase /jnlp
RewriteRule downloads/(.*) jarbounce.php?file=$1 [NE]
The php file then checks the filename (for security reasons) and the accepted encoding and sends the contents of a file (picked by AE and availability) back together with the correct headers (Content-Encoding reflecting the picked encoding and Content-Type set to "application/x-java-archive").
I've written such a script yesterday and I'm going to make it public. However, I want to do some more checks before releasing it (I ended up here by googling around... I wanted to avoid reinventing the wheel again ;)).
I'll post it over at JGO pretty soon now... in this thread:
http://www.javagaming.org/cgi-bin/JGNetForums/YaBB.cgi?board=OnLin;action=display;num=1097590751;start=0
[I'm also planning to write an article about that, but that will take a bit longer]

Java Web Start and CORBA

Hello,
I have a C++ based CORBA server to which a Java based client gets connected. I want to put this java appln. on Java Web Start .
The identification of the CORBA server is thru' the published POA name.
Can anybody help me in making the java application available on JWS.
Rgds,
Mohan

You have to be a bit more explicit.

Java web start and database

Hi! I have a Java application that I have made into a Jar-file. Want to start this online using Java Web Start. The problem is that it has a connection to a Microsoft Access database, which must be registered to work (or does it?).
Is there a way to solve this so that the online user doesn't have to register the database, but can use the application as it is?

If the database needs to be shared across users, might want to migrate it to a client-server database (such as MySQL, PostgreSQL, MS SQL Server, Oracle, DB2, etc).
If the database is single-user (one copy of the database per user) you might be able to use something like Apache Derby. If your heart is set on Access, then I believe MS Access has to be installed on each client machine because it uses native DLL's.

Can we change the label of Java Web start at the time of downloading applic

can we change the label of Java Web start at the time of downloading application?
At the time of downloading application(jar files) java web start shows "Downloading Application" lable on it window , so can we change it so some other..

The 'splash' screen might be of interest to you.
Here is the quick description from the FAQ.
<http://java.sun.com/j2se/1.5.0/docs/guide/javaws/developersguide/faq.html#206>
Section 3.5 of the JNLP Spec. has more details on using a splash screen for an application.
(But if you mean changing the very first screen seen when downloading an application the first time, the answer is 'no'.)
Late addendum..
By the way - now I review your question, I note you stress 'while jars are downloading'.
There is another strategy you might take. Mark most of the application jar's as 'lazy' download, get the main GUI on-screen quickly, then use the JNLP API's DownloadService to fetch the rest of the jars, after the application is running.
This has the advantage that, then we can have complete control of whatever is shown on the screen during the bulk of the downloads. We might show ..a 'splash screen', or a dialog with the application name on it, or a progress dialog, ..or any combination of the three.
Edited by: AndrewThompson64 on Oct 22, 2007 3:01 PM

Java Web Start and IE6 as the default browser on win2k

Hi,
I need to access web pages from my java web start app. These pages are on the save server and the same webapp context as the jsp page to launch the web start app, and are protected.
I have tried with basic auth and servlet filter with cookie to control the access to the web server. When I need to access web server resource from web start app, I create the URL to the page I want to access, set the auth header or cookie and call the web start BasicService to open it in the default browser.
With Netscape 4/7 or Firefox as the default browser, I have no problem to send the auth header or cookie from the web start app to the webserver for security checking and get access to the resource on the server.
But it seems not woking when IE is set to be the default browser. I am always asked for userid/password if I use basic auth; or redirected to the login page if I use servlet filter and cookie.
If anybody knows a solution for this IE dfficulity, could you please share it?
harry

How did you even get k9 on your iPad...it does not show up in my iTunes apps? So I
Had to download it on my computer ...transfer it to my iPad... Now it's in my Dropbox
On the iPad...but I can't figure out how to install it from here......I want a browser on my
iPad that ihas parental controls...I see quite a few should be in the iTunes store..even
Firefox....but not a one show up in my iTunes app store?????

Java Web Start and SSL

I have an AP designed as a Java Web Start program,
and I want it to connect to a web service via SSL.
I know how to do that in a normal AP. Just add a property like :
System.setProperty("javax.net.ssl.trustStore","my.keystore");
But since a JAWS program is downloaded from server, and don't have a my.keystore on local file system. I can't set a property that way. Is anyone know how to deal with this?
Can a signed jar file help?
Thanx in advance.

We had the same problem. There's basically two ways around this. One is extremely easy and the other is a pain.
easy: Use a CA certificate on the web server (Verisign, thawte etc.). All java applications already have a keystore (cacerts) that recognizes
these CAs. This keystore will be used when the cert on the server is a CA. Only drawback - $250 or so for the cert.
painful: Programmatically extract your personal certificate keystore from the deployed client jar. Also programmatically apply it to your SSL handler. Basically - you have to code what's done in a regular App simply by "javax.net.truststore=keyfile". I didn't explore this option
too much as the easy option was viable.

I don't want application show message "Java web start in the bottom of app"

Dear
please help me.
I am using jdk 1.4.1_01 and JWS 1.2. when I launch application through web stat. In bottom of application , the title "Java web start" appears, it also appear in the bottom of popup menu, menu item bar, dialog,...
Can I disappear it.
Please help me.
Thanks

I don't think it's documented anywhere, but if you sign the jar, that message will go away.

Java Web Start and Firefox

Hello!
I want to use some java web start applications, which are started directly by clicking a link. My browser (firefox) doesn't know the java web start mime type (*.jnlp). Because of that I can only download the specific JNLP-File instead of executing this file to start the java app.
There is no jnlp mime type in the firefox section Edit-->Preferences --> Application and I can't add a new mime type because there is no funkction to did that job.
I have installed the jre and the jdk package. In firefox Tools --> Addons there is the plugin "Java Plug-in 1.6.0_19" listed.
Has anybody an idea, who to add the jnlp mime type in firefox?
Thanks for help!
Best regards,
Flasher

Maybe this can help you.
And related link in Ubuntu Forum.

Java Web Start and Remote Scripting Incompatibility?

I recently installed the Java Web Start plugin to Internet Explorer, in order to run Sun's version of the Java Virtual Machine.
After the install, I am receiving errors when trying to run a web application that uses the Remote Scripting technology for client-server communication.
I think this might be related to the Java 2 security model, which requires all Java applets to be signed. The Remote Scripting client-side component seems to be unsigned, so that may be causing my problem.
Does anyone have a solution for this problem?
Any help is greatly appreciated.
Best Regards,
Nicole Roberts

Hi,
I had the same problem on a unix server!
The new build of IE on Windows 2003 from Microsoft that excludes the JVM (Java Virtual Machine), works fine with the JVM coming from Sun, except for the following.
We are experiencing problems, that if we are not logged in as Domain administrator, we get an Apache security prompt to log on, as soon as the RSProxy class is used. It seems that the Class is not picking up the current session, but tried to create another session, without a userid, and then prompts you for your login details.
We still cannot figure out, why it does not do it with the Domain Administrator account.
Can someone please have a look into this.
I think there is a simple configuration problem somewhere, that will allow seamless integration with Sun's JVM.
I could resolve it so far by loading the Microsoft JVM back into Win2k3 theough the Visual Studion 6 Cd's, but I don't like the idea of that!

Java Web Start and the Mac OS

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