Campus Course & Records Manager (CCRM)

1. Project Overview

The Campus Course & Records Manager (CCRM) is a console-based Java application designed to manage students, courses, enrollments, and grades for an educational institute. It demonstrates a comprehensive understanding of core and advanced Java SE concepts, including Object-Oriented Programming, modern APIs, design patterns, and robust error handling.

Core Features:

• Student Management: Add, list, and view student profiles and transcripts.
• Course Management: Add, list, and search courses by department or semester.
• Enrollment & Grading: Enroll students in courses, assign grades, and compute GPA.
• Data Persistence: Import/Export data to CSV files and create timestamped backups.

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2. How to Run

1. Prerequisites: JDK 17 or later must be installed.
2. Clone Repository: git clone https://github.com/Rahul-kr1623/CCRM-Java-Project.git
3. Navigate to Project: Open the project in an IDE like Eclipse or IntelliJ.
4. Enable Assertions: In your IDE's run configuration, add -ea to the VM arguments.
5. Run: Execute the main method in edu.ccrm.cli.CCRMApp.java.

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3. Java Platform Explanations

Evolution of Java

• 1995: Java 1.0 is released by Sun Microsystems.
• 2004: J2SE 5.0 (Tiger) brings major features like Generics, Enums, and Annotations.
• 2014: Java SE 8 is a landmark release with Lambda Expressions and the Stream API.
• 2018: Java SE 11 is released as a Long-Term Support (LTS) version.
• 2023: Java SE 21 is released as the latest LTS version, featuring Virtual Threads.

Java ME vs. SE vs. EE

Feature	Java ME (Micro Edition)	Java SE (Standard Edition)	Java EE (Enterprise Edition)
Primary Use	Embedded systems, IoT, old mobile devices.	General-purpose desktop & server applications.	Large-scale, distributed, enterprise-level applications.
Core API	A subset of the Java SE API.	The core Java programming platform.	Builds on top of Java SE with extensive libraries.
Example App	A simple game on a feature phone.	This CCRM project.	An online banking system or e-commerce website.

JDK vs. JRE vs. JVM

• JVM (Java Virtual Machine): An abstract machine that runs Java bytecode, making Java platform-independent.
• JRE (Java Runtime Environment): Includes the JVM and core libraries needed to run a Java application.
• JDK (Java Development Kit): Includes the JRE plus tools needed to develop Java applications, like the compiler (javac).

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4. Mapping Table: Requirements to Code

Requirement	Location in Code
OOP: Encapsulation	domain/Person.java (private fields with public getters/setters)
OOP: Inheritance	domain/Student.java (the line public class Student extends Person)
OOP: Abstraction	domain/Person.java (declared as an abstract class with an abstract method)
OOP: Polymorphism	cli/CCRMApp.java (handleListAllStudents calls the overridden student.printProfile())
Design Pattern: Singleton	service/DataStore.java
Design Pattern: Builder	domain/Course.java (the static nested Builder class)
Interfaces	util/ReportGenerator.java (declaration of the interface)
Lambda Expression	cli/CCRMApp.java (in handleGenerateReport, used to implement ReportGenerator)
Enums with Constructors	domain/Grade.java and domain/Semester.java
Custom Exceptions	util/DuplicateEnrollmentException.java
Exception Handling	cli/CCRMApp.java (in handleEnrollStudent, the try-catch block)
File I/O: NIO.2	io/FileService.java (use of Path, Paths, Files.write, Files.copy)
Streams API	service/CourseService.java (in searchCoursesByDepartment, used to filter)
Date/Time API	domain/Person.java (the private LocalDate dateOfBirth; field)
Recursion	io/FileService.java (in calculateDirectorySize method, which uses Files.walk)
Nested Class (static)	domain/Course.java (the public static class Builder)
Inner Class (non-static)	domain/Student.java (the private class Transcript)
Anonymous Inner Class	cli/CCRMApp.java (in handleAnonymousClassDemo, used to implement Predicate<Student>)
Immutable Class	domain/Department.java
Assertions	domain/Course.java (in the Course(Builder builder) constructor)