Java Web Start vs Signed Applet

What is the difference between a web start application and a signed applet.
I tested both but i dont see any advantage to web start.
Someone can tell me ?

christophe,
There is another thread on this topic in this forum...it is titled "Really basic question: why?"

Similar Messages

64bit, java web start, media framework, applets avi mov e.s.o.

Using 64bit, (SuseLinux), nothing works i.e. webbrowsers (firefox),
java web start, media framework, applets, avi, mov, e.s.o.
-How to do to work around this? (I have latest jre+sdk 6)
(note: firefox doing stupid thing when try to download plugin)
Is it possible to write some kind of HTML-code to download an
JAR-file from my (domain) webserver? And then: How to start it? (subject above)

Works just fine for me, too even though the "instructions" do not mention any Mac OS or browser.
Are you really at 10.4.8? Use Software Update to move up to 10.4.11.

Differences between Java Web Start and HTML-Applets???

Hi,
I'm trying to get information about the differences between JWS-Applets and 'normal' HTML-embedded Applets.
Is it possible to develop both simultaneously in one project???
Is there a Programming-documentation that describes the differences between JWS and HTML-Applets???
Thanx!
Rembrand

Check out the link shown below:
http://java.sun.com/products/javawebstart/1.2/docs/developersguide.html
All you need really is to create a JNLP file to launch your applet/application.
;o)
V.V.

Java web start security dialog with Java 7 update 51

I build a Java Web Start application signed with a valid certificate.
When I star the application the security dialog appear correctly as show in this figure
http://www.java.com/en/img/download/trusted_signed.jpg
My issue is about the "do not show again" checkbox.
If the attributes href are present in the jnlp tag of the jnlp file the checkbox appear.
If the attribute are not present, the checkbox doesn't appear and the run needs to be confirmed every time.
(Example:
<jnlp spec="1.0+" codebase=
"http://docs.oracle.com/javase/tutorialJWS/samples/deployment/webstart_ComponentArch_DynamicTreeDemo"
href="dynamictree_webstart.jnlp">
This is a problem because my jnlp file is under a password protected directory and if href is specifed, the Java Web Start application try to retrieve it as the other resources. ( result in access denied because only the browser session is authenticated and the run fails)
The documentation at Deploying a Java Web Start Application said:
The codebase and href attributes are optional when deploying Java Web Start applications that will run on at least the Java SE 6 update 18 release or later. You must specify the codebase and href attributes when deploying Java Web Start applications that will run with previous releases of the Java Runtime Environment software.
What is the right code? With href or without?
Is this a BUG or a feature?
How can I show the "don't show again" checkbox without having to specify the href attribute?

From the documentation at JAR File Manifest Attributes for Security
If the Application-Library-Allowable-Codebase attribute is present and matches the location from which the RIA is started, then a single host is listed in the Location field for the prompt and the option to hide future prompts is provided.
This issue is also discussed here: Java Web Start security dialogs with Java 7 update 51 - Stack Overflow

Refresh an open web page on closing an applet launch from Java Web Start

Hi
I launch an aplication via Java Web Start from a link in a web page. I am looking to a solution to refresh my web page when I close my applet.
Thanks in advance to give me the solution or only to let me know if it's possible or not.

everything's possible. but this is not trivial. there is no direct connection between the html page that launched the app and the app. You can create an indirect connection by having the app notify a server process when it closes and having the page periodically polling the server for the app's status.

Java Web Start starting applet

Dear all,
I like to run heavy application as an applet and the best way is keep the jar containing the application in the client.
I am wondering whether I can use java web start or not to deploy in the client the jar with the applet and so the client doesn't need to reload the jar from server unless there's some changes in the server.
Can java web start also start the browser to start the application?
I don't see any example in the internet although in java web start documentation says it is possible.
Dani.

You don't want the 2 dukes... come Vietnam and I will invite you some beers... can you?
By the way... I know JWS is used to deploy applications.
Maybe my question was not clear... By using jnlp file you can tell jws what is the class to be launched once loaded the jar file, and so just using an URL with the path of the jnlp file in the server, the browser will reload the jar and then the application is launched automatically. What i am wondering is whether i can or not launch my applet just typing the URL where the jnlp file is and so use the same browser. Once the jar is loaded, the applet would be launched in the browser. I don't like every time the user has to use the application, first need to verify he has the latest jar file using one URL in the browser and then he has to type another URL to launch the applet...
Any ideas?
Edited by: Daniel23 on Sep 27, 2007 1:50 AM

Which solution should I adopt? Applet or Java Web Start?

Hi,
I am developing a web application which should print cards through a printer in the client side.
I would like to use a web start aplication to execute JNI calls in client side, but I am considering a possible solution the use of an Applet aplication to execute that.
My question is "Which solution should I adopt?"
Thanks a lot in advance.
Regards.
Paulo R. A. Sales.
Software Architect.

I would go for Java Web Start, since it is:
a wonderful tool
easy to use
gives you full control
you don't have to start your browser to print them cards
But wait for better qualified responses as I haven't written an applaet since school.

How to add scroll function in the applet launched by Java Web Start?

I have Java Web Start installed in order for the applet to launch.The applet size: width:700 height:1000
my compuer resolution:800*600
the applet launched by Java Web Start can only be seen partly,especially height.How to add scroll function in the applet launched by Java Web Start?
Thanks for help.
email:[email protected]

You can very easily add a JScrollPane manually between the Applet and your content. Perhaps it would be beter if javaws did this automatically. In the browser, an applet can be any size. In Java Web Start an applet is directly contained within a JFrame, so it cannot be smaller than the minimum size of a JFrame, or Larger than the max.

Java Web Start keeps asking user to accept signed app

When in select "run" in the java web start security popup for a signed web start application I expected that Java Web Start would remember my decision since the app i supposed to be installed and run locally the next time? But next time I run the app Im asked the same question. So far Im only using a self-signed certificate - will web start react differently when I use a real certificate? I do have the option to generally accept the certificate in the popup but I was hoping java web start would remember my decision on a per application basis?

Did a quick search on your post for '?' and did not find one. Did you have a question?
BTW - when posting code or code snippets, XML/HTML(/JNLP) or input/output, please use the code tags as described on the 'sticky post' on the top of the forum thread listing. It is not too late to edit your initial post to do that (and you might as well add a question while you have it open for edit).

Launching an applet with java web start

Is there a way to launch an applet with java web start? That is, to have the java appelt run in a browser but get deployed with a jnlp-file and have all the benefits of java web start?
Robert

http://www.physci.org/jws/#jtest

Java Web Start applications and Gatekeeper

As more of our customers upgrade to Mac OS X 10.8 or later or purchase new machines we've had to deal with helping more of them work around Gatekeeper for our Java Web Start deployed applications. Many discussions found on the web show the confusion that surrounds this technology and how it interacts with Web Start apps. Most "solutions" suggest various security changes like allowing apps downloaded from anywhere. The one we most often employ is to control-click the JNLP file and choose Open. Then the dialog has an option to "install" the application anyway.
My take-away from the discussions has been that Gatekeeper is looking for what it considers to be executable code, including JNLP files and Java applets, to be signed via codesign which is stored as an extended HFS attribute and as a result is not transferred over HTTP unless the file is wrapped into some bundle like xip or in a disk image (dmg). Neither of these are a click-and-run experience and move me from the realm of Web Start deployment to just wrapping it up as an Apple app bundle.
Before OS X 10.8 (Mountain Lion) was released, Scott K published on the Talking Java Deployment blog an article titled Java applications and Gatekeeper where he suggested the best possible user experience comes from creating an app that is bundled with Java and signed with an Apple Devloper ID using the codesign tool. (Note this is not the same as the code signing from jarsigner in the JAR/META-INF. The article ends, edited, with a statement that Gatekeeper does not apply to command-line tools like java, javac, javah and so on. It has been my experience that it does seem to apply to javaws or whatever is used on the Mac to launch a Web Start app from a JNLP file. It is as if Apple has said they don't trust the Java security model for downloaded dynamic code and are adding an extra restriction that seems to severely limit the "click-and-run" functionality of Web Start or applets.
Is there anything I can do to get a JNLP file to "just work" for Mac end users like it use to before 10.8 / Gatekeeper?
Is there anything in the works from Oracle to fix this issue?
Jacob

Probably not the case here, but considering it is a development machine it is something to check. The symptoms you describe are exactly what happens when you setup JWS applications to be remotely debugged, and specify suspend=y. In that case, before the application launches, it waits for Eclipse (or some other development environment) to connect to it. I do this all the time and what happens before Eclipse attaches to the process is exactly what you describe. Check the JAVAWS_VM_ARGS to see what VM parameters are being used.
Jake

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 Policy File

Hi,
I've a problem for Java Web Start (JWS) in working with Policy File.
I like to apply a policy file for a JWS application to fine tune the secuirty setting instead of granting permission in JWS.
For an applet environment, I can apply policy file like this:
appletviewer -J"-Djava.security.policy=all.policy" writeFile.html
However, in JWS environment, I try to apply in JNLP file as below but fail:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+"
codebase="http://130.18.52.226:8080/testing/"
>
<information>
<title>JWS JFrame App</title>
<vendor>Java Developer Connection</vendor>
<homepage href="http://java.sun.com/jdc" />
<description>Demonstration of JNLP</description>
<icon href="hsbc.gif" width="32" height="32" />
</information>
<resources>
<j2se version="1.3*" />
<property name="java.security.manager" value="x" />
<property name="java.security.policy" value="testing.policy"/>
<jar href="testing.jar"/>
</resources>
<application-desc main-class="JWSJFrameApp" />
</jnlp>
The error message like this:
Java Web Start Console, started Tue Sep 03 09:59:36 CST 2002
Java 2 Runtime Environment: Version 1.3.0 by Sun Microsystems Inc.
java.security.AccessControlException: access denied (java.util.PropertyPermission java.security.manager write)
java.security.AccessControlException: access denied (java.util.PropertyPermission java.security.policy write)
Could anyone please help on this!
Many thanks!
Regards,
Simon Ho

There are two problems with what you are trying to do.
First, setting a property PROP=VALUE in the jnlp file does not mean that java will be launched -DPROP=VALUE, instead, javawebstart will call System.setProperty(PROP,VALUE) before your apps main() is called. The difference is, the property will not be set at the time the VM is initialized.
Second, the javaws security policy will not allow you to set arbitrary properties in an unsigned application. Only properties begining with "jnlp." or "javaws." (and possibly a few other specific props known to the native javaws code) can be set in an application unless <all-permissions> is specified and the app is signed.

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

Initial Context is slow within Java Web Start

All,
I have a Swing-based client app that makes EJB calls on a Weblogic 6.1sp2
server. It works great as a standalone app run from the command line. The
problem is when I deploy it using Java Web Start. The 'new
InitialContext(props)' call takes from 5-20 seconds. This is on a single
user development machine with the server and client running on the same
machine.
When I run it from the command line the initial context only takes 1-2
seconds to create. This is using the exact same .jar file used in the Web
Start case.
The Web Start environment is somewhat different than command line clients.
I think it is similar to the applet sandbox environment (security,etc).
Other than this, the client/server interaction speed is good (they should
be since they are on the same machine!). Any ideas?
System particulars:
Weblogic 6.1sp2. Native IO.
Host=127.0.0.1 (Reverse DNS Lookup disabled in server).
Java 1.3.1
Java Web Start 1.0.1
Windows NT 4.0sp5

I have some more details. If I signed the .jar file and give it all
permissions, then the performance is fine (~1s to get initial context).
Does anyone know which permissions are needed to connect quickliy? I would
like to only give the application those permissions it really needs.
Thanks.
Mike Houston <[email protected]> wrote in
news:[email protected]:
All,
I have a Swing-based client app that makes EJB calls on a Weblogic
6.1sp2 server. It works great as a standalone app run from the command
line. The problem is when I deploy it using Java Web Start. The 'new
InitialContext(props)' call takes from 5-20 seconds. This is on a
single user development machine with the server and client running on
the same machine.
When I run it from the command line the initial context only takes 1-2
seconds to create. This is using the exact same .jar file used in the
Web Start case.
The Web Start environment is somewhat different than command line
clients. I think it is similar to the applet sandbox environment
(security,etc).
Other than this, the client/server interaction speed is good (they
should be since they are on the same machine!). Any ideas?
System particulars:
Weblogic 6.1sp2. Native IO.
Host=127.0.0.1 (Reverse DNS Lookup disabled in server).
Java 1.3.1
Java Web Start 1.0.1
Windows NT 4.0sp5

Java Web Start vs Signed Applet

Similar Messages

Maybe you are looking for