StudentManagementSystem.java

import java.util.ArrayList;
import java.util.Scanner;
class Student{
    private int id;
    private String name;
    private String course;

    public Student(int id, String name, String course){
        this.id=id;
        this.name=name;
        this.course=course;

    }
    public int getid(){
        return id;
    }
    public void setName(String name){
        this.name=name;
    }
    public void setCourse(String course){
        this.course=course;
    }
    public void displaystudent(){
        System.out.println(id+"\t"+name+"\t"+course);
    }

}

public class StudentManagementSystem {
    static ArrayList<Student> students = new ArrayList<>();
    static Scanner sc = new Scanner(System.in);

    public static void addstudent(){
        int id=sc.nextInt();
         sc.nextLine();

        System.out.print("Enter Name: ");
        String name = sc.nextLine();

        

        System.out.print("Enter Course: ");
        String course = sc.nextLine();

        students.add(new Student(id,name,course));
         System.out.println(" Student added successfully!");


    }
    public static void viewStudents() {
        if (students.isEmpty()) {
            System.out.println(" No student records found.");
            return;
        }

        System.out.println("\nID\tName\tAge\tCourse");
        System.out.println("--------------------------------");
        for (Student s : students) {
            s.displaystudent();
        }
    }
    public static void updateStudent() {
        System.out.print("Enter Student ID to update: ");
        int id = sc.nextInt();
        sc.nextLine();

        for (Student s : students) {
            if (s.getid() == id) {
                System.out.print("Enter new Name: ");
                s.setName(sc.nextLine());

                

                System.out.print("Enter new Course: ");
                s.setCourse(sc.nextLine());

                System.out.println("Student updated successfully!");
                return;
            }
        }
        System.out.println("Student not found.");
    }

    
    public static void deleteStudent() {
        System.out.print("Enter Student ID to delete: ");
        int id = sc.nextInt();

        for (Student s : students) {
            if (s.getid() == id) {
                students.remove(s);
                System.out.println("Student deleted successfully!");
                return;
            }
        }
        System.out.println("Student not found.");
    }

    
    public static void main(String[] args) {

        while (true) {
            System.out.println("\n====== Student Management System ======");
            System.out.println("1. Add Student");
            System.out.println("2. View Students");
            System.out.println("3. Update Student");
            System.out.println("4. Delete Student");
            System.out.println("5. Exit");
            System.out.print("Enter choice: ");

            int choice = sc.nextInt();

            switch (choice) {
                case 1:
                    addstudent();
                    break;
                case 2:
                    viewStudents();
                    break;
                case 3:
                    updateStudent();
                    break;
                case 4:
                    deleteStudent();
                    break;
                case 5:
                    System.out.println("Exiting program. Thank you!");
                    return;
                default:
                    System.out.println("Invalid choice!");
            }
        }
    }
}