Re: Differences between Appletviewer and Browser plugin

From:
"Andrew Thompson" <u32984@uwe>
Newsgroups:
comp.lang.java.programmer
Date:
Sun, 15 Jul 2007 12:44:29 GMT
Message-ID:
<75358195ce56c@uwe>
Daniel Kraft wrote:
...

I've written a Java Applet; my problem is that the very same applet runs
fine under Sun's appletviewer, but the Browser plugin (Mozilla) of the
same JDK (1.5.0_06, GNU/Linux) complains that it does not find my Applet
class.


FF on Win. running Java 1.6 reports..
...
basic: Exception: java.lang.ClassFormatError: Incompatible
magic value 1008813135 in class file eu/domob/klammgolf/player/PlayApplet

What are the differences between appletviewer and the Browser with plug
in that could make such a thing happen?


The differences between how applets behave in most
browsers, running most Java versions, with any variety
of plug-ins installed or security enabled, is slightly
different in most combinations.

If one combination (of browser make and version,
combined with Java version, plug-ins/security) actually
matched the behaviour of AppletViewer in every way,
it would be almost purely by accident.

...I'm currently a bit confused by
this problem...


Yes - applets can be that way - epsecially with every
browser reporting the problem in slightly different ways.
An earlier test with IE showed an odd applet loaded
(odd in the sense that nothing seemed to be in the
center of the GUI, just a title bar and a bar on the lower
right), but when I clicked something that attempted to
reload the page, IE 'froze and crashed'.

Could this be a problem with caches or something similar?


Why not launch that applet using web start?*
It uses applet viewer, and removes a lot of the
browser based variables. At least the error
messages, if any, should be consistent!

* e.g. <http://www.physci.org/jws/#jtest>

--
Andrew Thompson
http://www.athompson.info/andrew/

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