The above class diagram is for the library management system. There are total five classes, which are Book, Student, Librarian, Admin and Fine. The book class is for the information of books. The librarian class has the information of librarian and the functions he can perform. The Admin class has the information of username and password. The student class is for those students who can register as the member of library. The fine class has the information of fine and the students who are fined.
