Error message when trying to run a JNLP file

[dewitrydan]

I am following "java in 21 days"
I am dealing with JNLP files.
I try to access the JNLP file through the internet browser.
but get this error mesage:

I've also uploaded the code in a zip file.
Can you tell me where I am going wrong and hwo to get it to work?
Thanks

[DarrylBurke]

1) What does "java -version" give you when you issue this command at a Command Prompt?
2) What do you have in the .jnlp file's "j2se version" tag?

db

[dewitrydan]

<j2se version="1.56"/>

thanks :)

[Norm]

Also check this: codebase="http://www.cadenhead.org/book/java-21-days/java"

Where is the jar file located? If on your disk, change above to:

codebase="."

[dewitrydan]

Yep, it's run on the hard disk, I've changed the code to what you said:

<?xml version="1.0" encoding="utf-8"?>
<!-- JNLP File for the PageData Application -->
<jnlp
  codebase="."
  href="PageData.jnlp">
  <information>
    <title>PageData Application</title>
    <vendor>Rogers Cadenhead</vendor>
    <homepage href="http://www.java21days.com"/>
    <icon href="pagedataicon.gif"/>
    <offline-allowed/>
  </information>
  <resources>
    <j2se version="1.56"/>
    <jar href="PageData.jar"/>
  </resources>
  <security>
    <all-permissions/>
  </security>
  <application-desc main-class="PageData"/>
</jnlp>

But get this exception:

JNLPException[category: System Configuration : Exception: null : LaunchDesc: 
<jnlp spec="1.0+" codebase="file:/D:/Users/test/Desktop/java_prob/" href="file:/D:/Users/test/Desktop/java_prob/PageData.jnlp">
  <information>
    <title>PageData Application</title>
    <vendor>Rogers Cadenhead</vendor>
    <homepage href="http://www.java21days.com"/>
    <icon href="file:/D:/Users/test/Desktop/java_prob/pagedataicon.gif" kind="default"/>
    <offline-allowed/>
  </information>
  <security>
    <all-permissions/>
  </security>
  <update check="timeout" policy="always"/>
  <resources>
    <java version="1.56"/>
    <jar href="file:/D:/Users/test/Desktop/java_prob/PageData.jar" download="eager" main="false"/>
  </resources>
  <application-desc main-class="PageData"/>
</jnlp> ]
	at com.sun.javaws.Launcher.downloadJREResource(Unknown Source)
	at com.sun.javaws.Launcher.prepareResources(Unknown Source)
	at com.sun.javaws.Launcher.prepareAllResources(Unknown Source)
	at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
	at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
	at com.sun.javaws.Launcher.launch(Unknown Source)
	at com.sun.javaws.Main.launchApp(Unknown Source)
	at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
	at com.sun.javaws.Main$1.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

[Norm]

I get a different error when trying to launch the JNLP file:

Java Web Start 1.6.0_20
Using JRE version 1.6.0_20-b02 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\Owner
...
#### Java Web Start Error:
#### Found unsigned entry in resource: file:/D:/JavaDevelopment/Testing/JNLP/java problem/PageData.jar

com.sun.deploy.net.JARSigningException: Found unsigned entry in resource: file:/D:/JavaDevelopment/Testing/JNLP/java_problem/PageData.jar
at com.sun.javaws.security.SigningInfo.getCommonCodeS ignersForJar(Unknown Source)
at com.sun.javaws.security.SigningInfo.check(Unknown Source)
at com.sun.javaws.LaunchDownload.checkSignedResources Helper(Unknown Source)
at com.sun.javaws.LaunchDownload.checkSignedResources (Unknown Source)
at com.sun.javaws.Launcher.prepareResources(Unknown Source)
at com.sun.javaws.Launcher.prepareAllResources(Unknow n Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.launch(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

My .jnlp file:

<?xml version="1.0" encoding="utf-8"?>
<!-- JNLP File for the PageData Application  NB: changed version from 1.56 to 1.6-->
<jnlp
  codebase="."
  href="PageData.jnlp">
  <information>
    <title>PageData Application</title>
    <vendor>Rogers Cadenhead</vendor>
    <homepage href="http://www.java21days.com"/>
    <icon href="pagedataicon.gif"/>
    <offline-allowed/>
  </information>
  <resources>
    <j2se version="1.6"/>
    <jar href="PageData.jar"/>
  </resources>
  <security>
    <all-permissions/>
  </security>
  <application-desc main-class="PageData"/>
</jnlp>

[dewitrydan]

oh :/
What do you suggest the code should be to get it working? thanks

[Norm]

Try removing the security section (3 lines). The following works for me:

<?xml version="1.0" encoding="utf-8"?>
<!-- JNLP File for the PageData Application  NB: changed version from 1.56 to 1.6-->
<jnlp
  codebase="."
  href="PageData.jnlp">
  <information>
    <title>PageData Application</title>
    <vendor>Rogers Cadenhead</vendor>
    <icon href="pagedataicon.gif"/>
    <offline-allowed/>
  </information>
  <resources>
    <j2se version="1.6"/>
    <jar href="PageData.jar"/>
  </resources>
  <application-desc main-class="PageData"/>
</jnlp>

[dewitrydan]

holy mother
it works
thanks allot!!! :D

[Norm]

Its one of those magical mysteries until we understand how JNLP works.