On a solaris system with tiger (1.5), the /usr/java symlink links relatively
to "jdk/jdk1.5[SOME_NUMBER]" i.e.
java -> jdk/jdk1.5.0_04

On a solaris system with mustang (1.6), the /usr/java symlink links absolutely
to "/usr/jdk/jdk1.6[SOME_NUMBER]" i.e.
java -> /usr/jdk/jdk1.6.0_04

.
We've come across the situation with proposed install scripts (for enabling
accessibility features of the java runtime environment) where the scripts
fail to insert the necessary hooks into the java enviro because of the
'absoluteness' of the _Mustang_ java symlink.