Documentation
managed here
helpString
and argstring fields (19, 20)
initialized
by protected constructor (31, 32)
doIt() method
(54):
abstract public void
doIt ( StringTokenizer args, Shell sh );
doIt is passed the rest
of the text on the Juno command
line, and the Shell its acting for
Each concrete
ShellCommand implements its own
doIt() - polymorphism