I spent yesterday getting at least the text version of blackdowns j2re1.3.1 working on a SL-C3000. The following is what I did, although other methods can be used.
I installed in /hdd2/usr/local/java (as I normally have different vm‘s within java)
cd /hdd2/usr/local/java/j2re1.3.1
cd lib
ln -s armv4l armv5tel
cd ../bin
ln -s armv4l armv5tel
cd ..
pwd
/hdd2/usr/local/java/j2re1.3.1
tar xf /hdd3/additional-ipaq-stuff.tar
need to add
LD_LIBRARY_PATH=$PWD/lib
for the libBrokenLocale.so to be loaded. A portion of this is related to the way the ROM is setup by default. Of course, X11 items are not on the stock item. So I have only run Derby so far. I also added the needed library path to ld.so.conf.
I'll try to locate some other builds, but I think my netwinder is dead (no power).
Related: I think the Floating Point Emulator from Rebel.com had a problem in the JCK (java compatability kit (test suite)) with MAX somehow or another.
scott