By the way, after a lot of work updating Java, one may think of getting rid of legacy Java 7 in Solaris 11.3 GA, but I regret to inform that forcing this may cripple the system or at least lead to some unsupported configuration.
NOTE
If, on the other hand, an Ad Hoc Java installation has been made without IPS, then it may be easier to work out the removal as long as one assures no further dependencies would be broken.