On the Oracle public tool pages (both Windows and Unix); -- see, for example, http://docs.oracle.com/javase/8/docs/technotes/tools/unix/jjs.html -- there is a --classpath option listed for setting the script classpath. (I think; I'm about to test it.)
The option is actually -classpath, not --classpath. If this is not the right place to note that, let me know where I should. -- David P. Caldwell http://www.davidpcaldwell.com/