Re: Applets and Inner class problems

From: Alex Hunsley (lard_at_tardis.ed.ac.molar.uk)
Date: 12/12/03 

Date: Fri, 12 Dec 2003 17:27:00 +0000

Chabonga wrote:

> I feel really dumb right about now. I have adapted an example from
> sun's site to suit my needs for an image pan and zoom tool. In
> eclipse, the applet runs fine, given the proper parameters are passed.
> When I embed the applet in a html page, the JRE console gives me
> these errors:
>
> java.lang.NoClassDefFoundError: imagezoom$DrawingPane
> at java.lang.Class.getDeclaredConstructors0(Native Method)
> at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
> at java.lang.Class.getConstructor0(Unknown Source)
> .
> .
> .
>
> The applet tag I am using looks like:
>
> <applet code="imagezoom.class" width="300" height="300">
> <param name="name" value="imagezoom.class">
> <param name="imagename" value="D0001636.jpg">
> <param name="path" value="images">
> Sorry, your browser can't display applets.
> </applet>
>
> I have tried various modifications of this with no luck.
>
> DrawingPane is an inner class of imagezoom, the source code of which
> looks like:
>
> Can anyone see what I am doing wrong? TIA,
>
> Trev

Internal classes get compiled to seperate class file. In this case you
will end up with a class file called imagezoom$DrawingPane.class as well
as one called imagezoom.class. Why don't you put all your classes
(including the inner class file imagezoom$DrawingPane) in a jar, and
upload that instead. Then you'd reference it as:

  <applet code="imagezoom.class" archive="imagezoom.jar" width="300"
     height="300">

Note that in the above I have added an archive parameter for specifying
your jar!

alex

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