Create A Hierarchy Of Classes With Specified Attributes

Create a hierarchy of classes with specified attributes and methods

Ignore logger parts, have a separate logger program already. Please add the following to the OfferedClass file, along with a setter and getter for it: private String classIdNumber; You will notice in the test class that the class id field you are adding is of type float. Create a hierarchy of classes as specified, implementing the appropriate data types, and include toString methods, setters, and getters for all variables. Use Java's GregorianCalendar for date attributes. The classes include Person (implements IPerson), Student, Faculty, Classroom, OfferedClass, StudentClass, and FacultyClass, with properties and relationships as specified.

Paper For Above instruction

The task involves creating a hierarchy of classes that model a university's personnel, classroom, and course offerings system, adhering to specified attributes, relationships, and data types. This structure emphasizes object-oriented principles such as inheritance, composition, encapsulation, and polymorphism, vital for accurately representing complex real-world entities in software.

Introduction

Designing an object-oriented hierarchy to model university personnel and courses requires a comprehensive understanding of how various entities relate and interact. The classes include Person, Student, Faculty, Classroom, OfferedClass, StudentClass, and FacultyClass, each with specific attributes and methods. This design allows for scalable, maintainable, and extendable code that accurately reflects real-world relationships.

Design and Implementation

At the core is the Person class, implementing the IPerson interface, encompassing fundamental individual details such as name, address, social security number, and date of birth, stored as GregorianCalendar objects. The Person class serves as the base class for Student and Faculty classes, which extend it, gaining its properties and adding specific attributes related to their roles.

The Student class introduces a date of graduation, current GPA, and a list of classes currently enrolled, represented by an ArrayList of StudentClass objects. Conversely, the Faculty class encapsulates data such as date of hire, date of termination, salary, classes currently teaching (ArrayList of FacultyClass objects), and employment status ('p' for part-time, 'f' for full-time).

The Classroom class models physical spaces with a room number and status (lab, classroom, lecture hall). OfferedClass serves as a base for specific class types and implements an interface IOfferedClass. It contains a Classroom object and class name. The StudentClass and FacultyClass extend OfferedClass, adding functionality specific to students and faculty, such as grades and enrolled students, respectively.

Each class includes appropriate constructors, getters, and setters for all variables, enabling encapsulation and data management. The toString() method is overridden in each class to provide meaningful string representations, facilitating debugging and display.

This structure emphasizes the "has-a" relationships through composition (e.g., a StudentClass has many grades; a FacultyClass has multiple students) and "is-a" relationships via inheritance (e.g., Student extends Person). The use of GregorianCalendar for date attributes captures precise dates, accommodating future date calculations or comparisons if needed.

Implementation Details

Interface Definition

Define the IOfferedClass interface specifying methods common to all offered classes. For simplicity, it might include method signatures like getRoom(), getName(), setRoom(), and setName(), though the specific interface isn't detailed here.

Class Implementations

Person: Implements IPerson; includes private fields for name, address, ssn, and dateOfBirth; with public getters, setters, and an overridden toString().

Student: Extends Person; adds dateOfGraduation, currentGPA, and classesEnrolled (ArrayList). Includes getters, setters, and toString().

Faculty: Extends Person; adds dateOfHire, dateOfTermination, salary, status, and classesTaught (ArrayList). Includes getters, setters, and toString().

Classroom: Has roomNumber and status; with associated constructors, getters, setters, and toString().

OfferedClass: Implements IOfferedClass; has classroom and name variables; with getters/setters and toString().

StudentClass: Extends OfferedClass; adds grades (ArrayList); with appropriate methods.

FacultyClass: Extends OfferedClass; adds students (ArrayList); with methods to manage students.

Conclusion

This hierarchy models the essential components of a university's personnel and course structure, combining inheritance for shared properties and composition for complex relationships. The included methods facilitate data encapsulation, manipulation, and presentation, providing a robust foundation for further development or integration into larger systems.

References

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