EmployeeManagementSystem.java

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

class Employee {
    private int id;
    private String name;
    private double salary;
    private String department;

    public Employee(int id, String name, double salary, String department) {
        this.id = id;
        this.name = name;
        this.salary = salary;
        this.department = department;
    }

    public int getId() { return id; }
    public String getName() { return name; }
    public double getSalary() { return salary; }
    public String getDepartment() { return department; }

    public void setName(String name) { this.name = name; }
    public void setSalary(double salary) { this.salary = salary; }
    public void setDepartment(String department) { this.department = department; }

    @Override
    public String toString() {
        return "Employee [ID=" + id + ", Name=" + name + ", Salary=" + salary + ", Department=" + department + "]";
    }
}

// Employee Management System
public class EmployeeManagementSystem {
    private static ArrayList<Employee> employees = new ArrayList<>();
    private static Scanner sc = new Scanner(System.in);

    // Create
    public static void addEmployee() {
        System.out.print("Enter ID: ");
        int id = sc.nextInt();
        sc.nextLine(); // consume newline
        System.out.print("Enter Name: ");
        String name = sc.nextLine();
        System.out.print("Enter Salary: ");
        double salary = sc.nextDouble();
        sc.nextLine();
        System.out.print("Enter Department: ");
        String dept = sc.nextLine();

        employees.add(new Employee(id, name, salary, dept));
        System.out.println(" Employee added successfully!\n");
    }

    // Read
    public static void viewEmployees() {
        if (employees.isEmpty()) {
            System.out.println(" No employees found.\n");
            return;
        }
        System.out.println(" Employee Records:");
        for (Employee emp : employees) {
            System.out.println(emp);
        }
        System.out.println();
    }

    // Update
    public static void updateEmployee() {
        System.out.print("Enter Employee ID to update: ");
        int id = sc.nextInt();
        sc.nextLine();

        for (Employee emp : employees) {
            if (emp.getId() == id) {
                System.out.print("Enter new Name: ");
                emp.setName(sc.nextLine());
                System.out.print("Enter new Salary: ");
                emp.setSalary(sc.nextDouble());
                sc.nextLine();
                System.out.print("Enter new Department: ");
                emp.setDepartment(sc.nextLine());
                System.out.println(" Employee updated successfully!\n");
                return;
            }
        }
        System.out.println(" Employee not found!\n");
    }

    // Delete
    public static void deleteEmployee() {
        System.out.print("Enter Employee ID to delete: ");
        int id = sc.nextInt();
        sc.nextLine();

        for (Employee emp : employees) {
            if (emp.getId() == id) {
                employees.remove(emp);
                System.out.println(" Employee deleted successfully!\n");
                return;
            }
        }
        System.out.println(" Employee not found!\n");
    }

    // Main Menu
    public static void main(String[] args) {
        while (true) {
            System.out.println("=== Employee Management System ===");
            System.out.println("1. Add Employee");
            System.out.println("2. View Employees");
            System.out.println("3. Update Employee");
            System.out.println("4. Delete Employee");
            System.out.println("5. Exit");
            System.out.print("Choose an option: ");

            int choice = sc.nextInt();

            switch (choice) {
                case 1 -> addEmployee();
                case 2 -> viewEmployees();
                case 3 -> updateEmployee();
                case 4 -> deleteEmployee();
                case 5 -> {
                    System.out.println(" Exiting... Goodbye!");
                    System.exit(0);
                }
                default -> System.out.println(" Invalid choice. Try again.\n");
            }
        }
    }
}