how to read jar file

[Bryce McKinlay]

Ian Zhang wrote:

> >From the document on the Red Hat web site, the gcj
> program can read a jar file.  But I tried the gcj
> which come from Red Hat 7 and did not make it work.
> It seems to me that gcj can only read .java or .class
> files. Can anyone help me with this and tell me exact
> command format?

I think it only works for uncompressed jar files. If you try to
compile a compressed jar, you'll get a "Not a valid .class file" error
or just an empty object file and no error. For an uncompressed jar,
you should be able to run something like:

gcj --shared myjar.jar -o myjar.so

or

gcj myjar.jar --main=my.Main -o myapp

regards

  [ bryce ]