rmid's usage message:

use: rmid [-port num] [-log dir] [-stop] [-Coption]

does not include the "-J" option for passing options to the underlying VM/runtime (for, say, setting the security policy file), and it is rather terse compared to the more verbose usage message of other J2SE SDK tools, like rmic's:

Usage: rmic <options> <class names>
 
where <options> includes:
  -keep Do not delete intermediate generated source files
  -keepgenerated (same as "-keep")
  -v1.1 Create stubs/skeletons for JDK 1.1 stub protocol version
  -vcompat (default) Create stubs/skeletons compatible with both
                           JDK 1.1 and 1.2 stub protocol versions
  -v1.2 Create stubs for JDK 1.2 stub protocol version only
  -iiop Create stubs for IIOP. When present, <options> also includes:
 
                   -always Create stubs even when they appear current
                   -alwaysgenerate (same as "-always")
                   -nolocalstubs Do not create stubs optimized for same process
 
  -idl Create IDL. When present, <options> also includes:
 
                   -noValueMethods Do not generate methods for valuetypes
                   -always Create IDL even when it appears current
                   -alwaysgenerate (same as "-always")
 
  -g Generate debugging info
  -depend Recompile out-of-date files recursively
  -nowarn Generate no warnings
  -nowrite Do not write compiled classes to the file system
  -verbose Output messages about what the compiler is doing
  -classpath <path> Specify where to find input class files
  -sourcepath <path> Specify where to find user source files
  -bootclasspath <path> Override location of bootstrap class files
  -extdirs <path> Override location of installed extensions
  -d <directory> Specify where to place generated class files
  -J<runtime flag> Pass argument to the java interpreter