CODEWITHSUNDEEP
javajspappletjnlpnext-generation-plugin
Erik
Erik

Reputation: 673

Class not found Exception when launching Applet using JNLP

I've run into a problem when trying to launch a jar file using JNLP. We've previously launched the applet without JNLP without any problems. We want to launch three different jars who are kept in the same directory together with the jnlp file. All jars are downloaded but we see a classNotFoundError as soon as we try to load a class from one of the external jars (i.e the ones that aren't the main one). The application runs until this happens so our main jar seem to execute. The JNLP file looks as follows:

<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" href="/jars/file.jnlp">
<information>
    <title>Client</title>
    <vendor>My Vendor</vendor>
    <description>Description</description>
    <description kind="short">Desc</description>
    <offline-allowed />
</information>
<security>
    <all-permissions />
</security>

<resources>
    <j2se version="1.6+" />
    <jar href="mainJar.jar" main="true" download="eager"/>
    <jar href="extJar1.jar" main="false" download="eager"/>
    <jar href="extJar2.jar" main="false" download="eager" />
</resources>
<applet-desc 
    name="MyApp" 
    main-class="path-to-main-class"
    width="1"
    height="1">
</applet-desc>
</jnlp>

The applet is then launched from the HTML file like this:

<applet
    code="com.mycompany.net.MyMainClass" 
    name="MyApp" 
    archive="/jars/extJar1.jar, /jars/extJar2.jar, /jars/mainJar.jar" 
    id="myId" 
    width="1" 
    height="1" 
    mayscript
    alt="The java plugin must be installed.">
            <param name="jnlp_href" value="/jars/file.jnlp"/>
    Java 1.5 or higher required.  
</applet>

I've checked then jnlp with Janela which gives me no errors. It works to run the applet from Eclipse as well as without the jnlp file. It also works to open the jnlp-file from javaws, specifying either the file or the url to the file. That leads me to think it's the html that is incorrect. This is however as far as I got. I've tried launching with the following javascript with same result:

<script src="http://www.java.com/js/deployJava.js"></script>
<script>
var attributes = {
        id:'myId', 
  code:'com.mycompany.net.MyMainClass', 
  width:1, 
  height:1, 
  name:"MyApp"
};
    var parameters = {
        jnlp_href:"/jars/file.jnlp",
        archive:"/jars/extJar1.jar, /jars/extJar2.jar, /jars/mainJar.jar",
    };
deployJava.runApplet(attributes, parameters, '1.6');

Upvotes: 2

Views: 3836

Answers (1)

Fuhrmanator
Fuhrmanator

Reputation: 12882

My JNLPs use external jars, and I defined the codebase="http://example.com/full/path/to/jars/" as well as href="http://example.com/full/path/to/jars/file.jnlp" in the <jnlp> tag.

Edit Try my working example - click the Lancer le planificateur button to see it in action.

edit2 check out JNLP as a Applet in HTML page to see if Object rather than Applet will help.

Upvotes: 0

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