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Main.java

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import java.util.Scanner;

public class Main {

public static void main(String[] args){

Scanner scanner = new Scanner(System.in);

StudentManager manager = new StudentManager();

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. Search Student");

System.out.println("4. Update Student");

System.out.println("5. Delete Student");

System.out.println("6. Exit");

System.out.println("Enter your choice");

int choice = scanner.nextInt();

switch (choice){

case 1:

scanner.nextLine();

System.out.println("Enter ID");

int id = scanner.nextInt();

scanner.nextLine();

System.out.println("Enter Name: ");

String name = scanner.nextLine();

System.out.println("Enter Age: ");

int age = scanner.nextInt();

scanner.nextLine();

System.out.println("Enter Course");

String course = scanner.nextLine();

Student student = new Student(id,name,age, course);

manager.addStudent(student);

break;

case 2:

manager.viewStudents();

break;

case 3:

System.out.println("Enter student ID to search: ");

int searchId = scanner.nextInt();

Student foundStudent = manager.searchStudentById(searchId);

if(foundStudent == null){

System.out.println("Student Not Found");

}else {

System.out.println(foundStudent);

}

break;

case 4:

System.out.println("Enter student ID:");

int updateId = scanner.nextInt();

System.out.println("Enter New Name");

String newName = scanner.nextLine();

System.out.println("Enter New Age");

int newAge = scanner.nextInt();

System.out.println("Enter New Course");

String newCourse = scanner.nextLine();

manager.updateStudent(updateId, newName, newAge, newCourse);

break;

case 5:

System.out.println("Enter Student ID to delete");

int deleteID = scanner.nextInt();

manager.deleteStudent(deleteID);

break;

case 6:

System.out.println("Exiting the program....");

scanner.close();

System.exit(0); // Terminates JVM

break;

default:

System.out.println("Invalid Choice");

break;

}

}

}

}