Taskno.4

import java.util.ArrayList;
import java.util.Scanner;

class Student {
    private String name;
    private int rollNumber;
    private String grade;

    // Constructor
    public Student(String name, int rollNumber, String grade) {
        this.name = name;
        this.rollNumber = rollNumber;
        this.grade = grade;
    }

    // Getters
    public String getName() {
        return name;
    }

    public int getRollNumber() {
        return rollNumber;
    }

    public String getGrade() {
        return grade;
    }
}

class StudentManagementSystem {
    private ArrayList<Student> students;

    public StudentManagementSystem() {
        students = new ArrayList<>();
    }

    public void addStudent(Student student) {
        students.add(student);
    }

    public void removeStudent(Student student) {
        students.remove(student);
    }

    public Student searchStudent(int rollNumber) {
        for (Student student : students) {
            if (student.getRollNumber() == rollNumber) {
                return student;
            }
        }
        return null;
    }

    public void displayAllStudents() {
        System.out.println("All Students:");
        for (Student student : students) {
            System.out.println("Name: " + student.getName());
            System.out.println("Roll Number: " + student.getRollNumber());
            System.out.println("Grade: " + student.getGrade());
            System.out.println();
        }
    }
}

class StudentManagementSystemApp {
    public static void main(String[] args) {
        StudentManagementSystem studentManagementSystem = new StudentManagementSystem();
        Scanner scanner = new Scanner(System.in);
        int choice;

        do {
            System.out.println("Student Management System Menu:");
            System.out.println("1. Add Student");
            System.out.println("2. Remove Student");
            System.out.println("3. Search Student");
            System.out.println("4. Display All Students");
            System.out.println("5. Exit");
            System.out.print("Enter your choice: ");
            choice = scanner.nextInt();
            scanner.nextLine(); // Consume newline

            switch (choice) {
                case 1:
                    // Implement adding a student logic
                    break;
                case 2:
                    // Implement removing a student logic
                    break;
                case 3:
                    // Implement searching for a student logic
                    break;
                case 4:
                    // Implement displaying all students logic
                    break;
                case 5:
                    System.out.println("Exiting Student Management System. Goodbye!");
                    break;
                default:
                    System.out.println("Invalid choice. Please try again.");
                    break;
            }
        } while (choice != 5);
        scanner.close();
    }
}