arraylist.txt

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

class Student {
    private String name;
    private int id;

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

    public String getName() {
        return name;
    }

    public int getId() {
        return id;
    }

    @Override
    public String toString() {
        return "ID: " + id + ", Name: " + name;
    }
}

public class StudentManagement {
    ArrayList<Student> students;
    Scanner scanner;

    public StudentManagement() {
        students = new ArrayList<>();
        scanner = new Scanner(System.in);
    }

    public void run() {
        int choice;

        do {
            System.out.println("\nStudent Management System");
            System.out.println("1. Add Student");
            System.out.println("2. Delete Student");
            System.out.println("3. Display Students");
            System.out.println("4. Search Student by ID");
            System.out.println("5. Search Student by Name");
            System.out.println("6. Exit");
            System.out.print("Enter your choice: ");
            choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    addStudent();
                    break;
                case 2:
                    deleteStudent();
                    break;
                case 3:
                    displayStudents();
                    break;
                case 4:
                    searchStudentByID();
                    break;
                case 5:
                    searchStudentByName();
                    break;
                case 6:
                    System.out.println("Exiting...");
                    break;
                default:
                    System.out.println("Invalid choice. Please enter a valid option.");
            }
        } while (choice != 6);

        scanner.close();
    }

    private void addStudent() {
        System.out.println("Enter student name:");
        String name = scanner.next();
        System.out.println("Enter student ID:");
        int id = scanner.nextInt();
        students.add(new Student(name, id));
        System.out.println("Student added successfully!");
    }

    private void deleteStudent() {
        System.out.println("Enter student ID to delete:");
        int idToDelete = scanner.nextInt();
        boolean found = false;
        for (Student student : students) {
            if (student.getId() == idToDelete) {
                students.remove(student);
                found = true;
                System.out.println("Student deleted successfully!");
                break;
            }
        }
        if (!found) {
            System.out.println("Student not found.");
        }
    }

    private void displayStudents() {
        System.out.println("Students:");
        for (Student student : students) {
            System.out.println(student);
        }
    }

    private void searchStudentByID() {
        System.out.println("Enter student ID to search:");
        int idToSearch = scanner.nextInt();
        boolean found = false;
        for (Student student : students) {
            if (student.getId() == idToSearch) {
                System.out.println("Student found:");
                System.out.println(student);
                found = true;
                break;
            }
        }
        if (!found) {
            System.out.println("Student not found.");
        }
    }

    private void searchStudentByName() {
        System.out.println("Enter student name to search:");
        String nameToSearch = scanner.next();
        boolean found = false;
        for (Student student : students) {
            if (student.getName().equals(nameToSearch)) {
                System.out.println("Student found:");
                System.out.println(student);
                found = true;
                break;
            }
        }
        if (!found) {
            System.out.println("Student not found.");
        }
    }

    public static void main(String[] args) {
        StudentManagement studentManagement = new StudentManagement();
        studentManagement.run();
    }
}