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Editorial Team
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Asked: 2026-05-24T18:52:17+00:00

I have a Java applet which utilizes multiple external jars. In Eclipse the project

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I have a Java applet which utilizes multiple external jars. In Eclipse the project runs fine. When it is exported and run embedded in a HTML file I get 22 run-time exceptions similar to.. 

java.lang.RuntimeException: java.lang.NoClassDefFoundError: 
    mil/dcgs/mdf/webservice/ddms/ingest/CatalogIngestService

..with various classes. When I open the exported jar I see no .class files or any other traces from the external jar.

HTML

The HTML is:

<html> 
<head> 
<title>DIB Applet</title> 
</head> 
<body> 
<applet 
    code="org.mitre.inception.Main.class" 
    archive="inception.jar" 
    WIDTH = "1020" 
    HEIGHT = "500">
Applet
</applet> 
</body> 
</html>

.classpath

My .classpath looks like the following.

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" path="src"/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
    <classpathentry kind="lib" path="C:/Users/myUserName/Desktop/jars/dcgs-util.jar"/>
    <!-- more jars removed for space reasons as they look the same as above -->
    <classpathentry kind="output" path="bin"/>
</classpath>
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1 Answer

  1. Editorial Team

    The classpath mentions dcgs-util.jar. That should probably be listed in the archive attribute of the applet element. Perhaps something like:

    <html> 
<head> 
<title>DIB Applet</title> 
</head> 
<body> 
<applet 
    code="org.mitre.inception.Main.class" 
    archive="inception.jar,jars/dcgs-util.jar" 
    WIDTH = "1020" 
    HEIGHT = "500">
Applet
</applet> 
</body> 
</html>

    That would be assuming inception.jar was in the same directory as the HTML, and that dcgs-util.jar is in the jars sub-directory of the dir. where the HTML is located.

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