Employee Management System
A console-based Java application to manage Employees, Managers, and Projects using OOP principles and Java 8 features.
- Add employees and managers with Id, name, age, salary, department
- Assign employees to managers
- Create projects and assign them to managers
- Assign employees to projects (only if under that manager)
- View all employees under a specific manager
- View manager-to-employee hierarchy with arrows
- Filter high-salary employees using Java 8 Streams
- Sort employees by name or age
- Group employees by department using
Collectors.groupingBy() - Show average salary per department
- Custom exception handling (e.g., for duplicate employee ID)
- Java 17 (or compatible version)
- Java Collections (
List,Map,Optional) - Java 8 Streams and Lambda expressions
- OOP concepts
- Custom Exceptions
- Console-based user interaction
| Class | Responsibility |
|---|---|
EmsConsole |
Main class; handles menu & user interaction |
EmsService |
Contains all business logic and data operations |
Person |
Base class with name and age |
Employee |
Extends Person; adds salary, department, ID |
Manager |
Extends Employee; contains team list |
Project |
Assigned to a manager; can have multiple employees |
DuplicateEmployeeException |
Custom exception for duplicate ID |