Java project

[Moni123-45]

import java.util.HashMap; import java.util.Map; import java.util.Scanner;

// Class to represent a student class Student { private String studentId; private String name; private String familyDetails;

public Student(String studentId, String name, String familyDetails) {
    this.studentId = studentId;
    this.name = name;
    this.familyDetails = familyDetails;
}

public String getStudentId() {
    return studentId;
}

public String getName() {
    return name;
}

public String getFamilyDetails() {
    return familyDetails;
}

}

// Class to manage student records class StudentRecords { private Map<String, Student> students; // Map to store students

public StudentRecords() {
    this.students = new HashMap<>();
    // Initialize with some sample data
    students.put("1001", new Student("1001", "Alice", "Parents: John Doe and Jane Doe"));
    students.put("1002", new Student("1002", "Bob", "Parents: Mike Smith and Sarah Smith"));
}

public Student getStudentById(String studentId) {
    return students.get(studentId);
}

}

// Class to manage user authentication class AuthenticationManager { private Map<String, String> credentials; // Map to store username -> password

public AuthenticationManager() {
    this.credentials = new HashMap<>();
    // Initialize with some sample credentials (in a real system, passwords should be hashed)
    credentials.put("user1", "password1");
    credentials.put("user2", "password2");
}

public boolean authenticate(String username, String password) {
    // Check if the username exists and the password matches
    return credentials.containsKey(username) && credentials.get(username).equals(password);
}

}

// Main class to run the program public class StudentManagementSystem {

public static void main(String[] args) {
    AuthenticationManager authManager = new AuthenticationManager();
    StudentRecords studentRecords = new StudentRecords();
    Scanner scanner = new Scanner(System.in);

    // Login loop
    boolean loggedIn = false;
    String username, password;
    do {
        System.out.print("Enter username: ");
        username = scanner.nextLine();
        System.out.print("Enter password: ");
        password = scanner.nextLine();

        loggedIn = authManager.authenticate(username, password);
        if (!loggedIn) {
            System.out.println("Invalid username or password. Please try again.");
        }
    } while (!loggedIn);

    System.out.println("Login successful!");

    // Once logged in, provide access to student records
    System.out.println("Welcome to Student Management System");

    // Example: Retrieve and display student details
    String studentId = "1001"; // Example student ID
    Student student = studentRecords.getStudentById(studentId);

    if (student != null) {
        System.out.println("Student ID: " + student.getStudentId());
        System.out.println("Student Name: " + student.getName());
        System.out.println("Family Details: " + student.getFamilyDetails());
    } else {
        System.out.println("Student not found!");
    }

    // Close scanner
    scanner.close();
}

}