The Linux troff java.1 man page has the following:

        -d32 Relates to assertions.

        -d64 Relates to assertions.
        
These two options don't apply to Linux, and they shouldn't
be in the Linux man page. (They should be and are in the
Solaris man page.) Moreover, they don't relate to assertions.
The options related to assertions are
-enableassertions (-ea), -disableassertions (-da),
-enablesystemassertions (-esa), and -disablesystemassertions (-dsa),
and these should be described in the Linux man page.