about tools.jar and jpeg replacements

[Albert]

I'm a new user of the gcj and I wonder what is the replacement for the 
tools.jar that java programs can use to compile classes (such as ant, or 
ImageJ), and the jpeg utilities.

My target is to compile the public domain ImageJ 
( http://rsb/info.nih.gov/ij/ ) program with gcj. At the moment I'm getting 3 
errors, and they have to do with the Compiler class and the JPEG encoder 
classes:

ij/plugin/Compiler.java:16: error: Type ‘sun.tools.javac.Main’ not found in 
declaration of field ‘javac’.
        private static sun.tools.javac.Main javac;
                          ^
ij/plugin/JpegWriter.java:40: error: Type ‘JPEGImageEncoder’ not found in the 
declaration of the local variable ‘encoder’.
               JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(f);
               ^
ij/plugin/JpegWriter.java:41: error: Type ‘JPEGEncodeParam’ not found in the 
declaration of the local variable ‘param’.
               JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);


I can of course just obliterate any jpeg stuff from the program and disable 
the compilation of plugins, but this is most undesirable. I anyone knows if 
replacements exist for these two, please let me know.

Albert
-- 
Albert Cardona
Molecular Cell Developmental Biology
University of California Los Angeles
Tel +1 310 2067376
Programming: http://www.pensament.net/java/
Research: http://www.mcdb.ucla.edu/Research/Hartenstein/
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