It is required to develop an application in Java to maintain information about students registered in various courses in a university.

$($A$)$ Write a class called Course having data members:

courseNum $($String such as ITCS$214),$ courseName $($String such as Data Structures$),$ credits $($int$),$ section $($int$).$

Include the following public methods in the class:

Default constructor $($without any parameters$),$ constructor with $4$ parameters, set and get methods for all attributes, equals and toString methods.

$($B$)$ Write a class called Student having following data fields:

idNum $($long$),$ firstName $($String$),$ lastName $($String$),$ gender $($char$),$ email $($String$),$ coursesRegistered $($ArrayList of type Course$).$

Note that coursesRegistered is a list of type ArrayList $($Java class$)$ in which each element is of class type Course. The coursesRegistered is the list of courses in which the student is currently registered.

It has following methods:

Default constructor $($without any parameters$),$ constructor with $5$ parameters $($except for coursesRegistered$),$ set and get methods for all attributes, equals, and printCoursesRegistered.

The list coursesRegistered is created as an empty list in the constructors. The equals method compares two objects of type Student based on their idNums.

$($C$)$ Write a class called Roster having following data members:

studentsList: list of students $$ LinkedList $($JCF Class$),$ each element is of type

Student, size: actual number of objects of type Student in the studentsList.

Include following methods in this class:

$($i$)$ Constructor without any parameter. Create studentsList as empty list and initialize size to $0.$

$($ii$)$ addStudent: inserts a new Student object at the end of the studentsList. Object of type Student is passed as parameter. If the object already exists in the list, then do not add the object and return false, else return true after successfully adding the object.

$($iii$)$ deleteStudent: deletes a Student object from the studentsList. The idNum of the Student is passed as parameter. If the object is not found in the studentsList, then the object cannot be deleted and the method returns false, else the method returns true, after successfully deleting the object.

$($iv$)$ searchStudent: searches the studentsList by idNum, passed as parameter. If the object is found, it returns its location in the studentsList, else returns $-1.$

$($v$)$ isEmpty: returns true, if the studentsList is empty, else returns false.

$($vi$)$ listSize: returns instance variable size.

$($vii$)$ getStudent: accepts a parameter index of type int and returns the object of type Student in studentList at location index.

$($viii$)$ addCourse: accepts an object of type Course as the first parameter and the idNum of the Student as the second parameter. The Course can be added only if the

$($a$)$ Student object with the specified idNum exists in the studentsList,

$($b$)$ Course does not exist in the coursesRegistered list for the Student,

$($c$)$ After adding the course, the number of credits, do not exceed $18.$

If the course is added successfully, return true, else return false.

$($ix$)$ deleteCourse: accepts an object of type Course as the first parameter and the idNum of the Student as the second parameter. The Course can be deleted only if the Student exists in the studentList and the Course exists in the list of courses registered for that student.

$($x$)$ printStudentDetails: accepts idNum of Student as a parameter and prints all the details of the Student and also all the details of the courses in which the Student is registered.

$($D$)$ Write a class called Registration having only menu$-$driven main method to test all functionalities of your classes. Use switch statement inside a loop, to write menu$-$driven program.

NOTE: For linked list use Java$$s built$-$in LinkedList class. Write detailed comments for each class and method. Write comments using Javadoc.