VMS Help JAVA, Qualifiers, /CLASSPATH  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /CLASSPATH=path
       -classpath path

    Specifies the path that the JAVA command uses to look up classes.
    Overrides the default or the CLASSPATH environment variable if
    it is set. Directories are separated by colons. Whether you use
    /CLASSPATH or -classpath, the general format for path is:

    .:{your_path}

    For example:

    .:/home/xyz/classes:/usr/local/java/classes