All programs (except the first) should include javadoc
comments, and all submissions should include javadoc files.
If you are not familiar with javadoc, it is described in
section 3.3 in Weiss.
main
All .java class files must include a main
method. The main is used to test the class independently.
import
import clauses are not allowed for classes that are
written by the students, all method names must be fully qualified.
import can be used for system-provided classes.