Where can I find some java classes in Debian

[Petter Reinholdtsen <pere@hungry.com>]

I had a go at building openjump version 1-2-D with ecj, but ran into a
few missing classes.  

The problematic ones are com.ermapper.ecw, javax.media.jai,
de.fho.jump.pirol.utilities and org.jmat.

Do these classes exist in Debian?

There is also a problem with the use of
com.sun.image.codec.jpeg.JPEGDecodeParam.  This is the code in
question:

  RenderedOp image = null;
  [...]
  image = FileLoadDescriptor.create(file.getPath(),null,null,null)
  [...]
  int jpg_colorspace = image.getColorModel().getColorSpace().getType();
  if (jpg_colorspace != JPEGDecodeParam.COLOR_ID_GRAY)

Is there an easy way to replace this with code that work with GNU
Classpath?

Happy hacking,
-- 
Petter Reinholdtsen