Solaris 8 is supposed to be able to execute a java program (packaged as
a jar file) merely by using the name of jar file as a command. The kernel
does this by invoking

   "/usr/java/jre/lib/sparc/jexec -jar <filename>"

jexec in Merlin is currently broken in that it is producing the output

# Hello.jar
Error: could not find libjava_g.so
Error: could not find Java 2 Runtime Environment.

The symbolic link /usr/java should point to /usr/j2se, in which Merlin
is installed. (This is standard on Solaris 9 Beta.)

Also note that some Solaris 8 systems and Solaris 9 are broken.
See bug 4491886.