Test bundles:
j2sdk-1_4_0-beta_refresh-bin-b72-solsparc-18_jul_2001.sh
j2sdk-1_4_0-beta_refresh-bin-b72-solsparcv9-18_jul_2001.sh

machine: sun4u/solaris8 64bit

copy these file to a same directory.
then run:
./j2sdk-1_4_0-beta_refresh-bin-b72-solsparc-18_jul_2001.sh
./j2sdk-1_4_0-beta_refresh-bin-b72-solsparcv9-18_jul_2001.sh

to install it.

then create /usr/java link to that jdk installed home directory and create a link /usr/bin/java to ../java/bin/java like before.

then run 'java -d64 -version', there will get some error:
execv(): No such file or directory.

It's seemed that in java program's SetDataModel function don't consider this condition and it want to execv a 64 bit java program under <java links dir>/sparcv9, but because there have a link, so will fail.

If I enter the jdk home, run './java -d64 -version' will succeed.