Hi all, when I started to use relationships, it ends up with different types of exceptions.. please give tell me what is key element and why index as the element in list ?
am using 3 tables..
student (studID primary key),courses(courseID primary key) and student-course(studID and courseID as columns )..
the student can select different courses.
so one student with
mapping file..
when I call session.save(obj).. then