testcase: http://javaweb.sfbay.sun.com/~ngthomas/lazypart/testJNLPApplet.html

source: http://javaweb.sfbay.sun.com/~ngthomas/lazypart/testApplet.java

a simple applet that calls into a method in draw package (draw.drawFoo.hello())

draw.jar is listed in a component-ext jnlp file, with the package tag.

    <jar href="draw.jar" part="draw" download="lazy"/>
<package name="draw.*" part="draw"/>

when you load the applet, exception is thrown:

Hello World testApplet!
basic: JNLP2ClassLoader.findClass: draw.drawfoo: try again ..
basic: Removed progress listener: null
Exception in thread "thread applet-testApplet-1" java.lang.NoClassDefFoundError: draw/drawfoo
at testApplet.init(testApplet.java:26)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: draw.drawfoo
at sun.plugin2.applet.Plugin2ClassLoader$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
at sun.plugin2.applet.JNLP2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
... 3 more


but if you remove the "package" tag line from the jnlp file, it works.

draw.jar contains a bunch of classes, including:
  402 Thu Sep 18 15:15:56 PDT 2008 draw/drawfoo.class