Main.java

import java.io.*;
import java.nio.charset.StandardCharsets;

// Entry point of the student management system
public class Main {
    public static void main(String[] args) {
        // Input file paths provided via command-line arguments
        String personFile = args[0];
        String departmentFile = args[1];
        String programFile = args[2];
        String courseFile = args[3];
        String assignmentFile = args[4];
        String gradeFile = args[5];
        String outputFile = args[6];
        // Initializes the core system
        StudentManagementSystem sms = new StudentManagementSystem();

        // Uses try-with-resources to safely manage writer
        try (BufferedWriter writer = new BufferedWriter(
                new OutputStreamWriter(new FileOutputStream(outputFile), StandardCharsets.UTF_8))) {

            // Load person records (students and faculty)
            writer.write("Reading Person Information \n");
            sms.loadPersons(personFile, writer);

            // Load department definitions
            writer.write("Reading Departments \n");
            sms.loadDepartments(departmentFile, writer);

            // Load academic programs
            writer.write("Reading Programs \n");
            sms.loadPrograms(programFile, writer);

            // Load course offerings
            writer.write("Reading Courses \n");
            sms.loadCourses(courseFile, writer);

            // Load course-student and course-faculty assignments
            writer.write("Reading Course Assignments \n");
            sms.loadAssignments(assignmentFile, writer);

            // Load student grades
            writer.write("Reading Grades \n");
            sms.loadGrades(gradeFile, writer);

            // Write the final report output
            sms.writeOutput(writer);

        } catch (IOException e) {
            // Handles file I/O errors
            System.out.println("An error occurred: " + e.getMessage());
        }
    }
}