Can I force caching of data files?

Our applet is an open-source molecular viewer, http://jmol.sourceforge.net
It fetches molecular model data files from the web server.
The larger molecular model files are a few hundred kb in size.
They are being fetch using URL.openStream(), which uses the URLConnection class.
It seems that the data files are not being cached in the local data cache.
Q: What kinds of files get cached in the local data cache (.jpi_cache or .java/deployment/cache/javapi) ?
Q: Is there anything I can do to ask that my data files be cached?
Thanks,
Michael

>
The Java Plug-in caches files of the following types
downloaded via HTTP/HTTPS:
.jar (jar file)
.zip (zip file)
.class (java class file)
.au (audio file)
.wav (audio file)
.jpg (image file)
.gif (image file)
So your options could be to jar up your files and
access them using the jar util classes (Im not 100% if
this can be done for your situation) or a bit of a
hack, is to rename your files to one of the above.
Hope this helpsI develop Java applets too and I load .zip archives via URLConnection. I got the same problem as -michaelthoward-:
My files (.zip) are almost NEVER being cached. Almost means that if I load the applet from my hardrive (effectively from localhost) they will then be cached.
At the moment I use the "dirty trick" -maherrj- mentioned too,, by renaming my .zip archives to .jpg.
But even then it can happen that bigger files (about 300kb up) are STILL NOT CACHED. This strange and unreliable behaviour of the Applet Plug-In from Sun takes effect from Java 1.2 to 1.5beta2.
If anyone has ideas (I don't dare to speak of fixes) please write.

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