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🏥 Java OOP Practice – Hospital Management System

A console-based Java application that simulates basic operations in a hospital. This project is ideal for practicing Object-Oriented Programming concepts such as inheritance, abstraction, encapsulation, and polymorphism.

To start the assessment create a branch or clone the repo...Don't push to main

⏱ Duration

Target Time: 120 minutes
Skill Level: Intermediate
Focus: Real-world objects, polymorphism, abstract classes, business logic

✅ Objective

Build a CLI-based system that allows:

  • Adding patients and doctors
  • Scheduling and completing appointments
  • Listing doctors and their specialties
  • Displaying patient visit history

🧱 Requirements

  • Use Scanner for input
  • Store all data in ArrayLists
  • Use int for any payment amounts (cents)
  • Focus on clean, modular OOP design

🧩 Classes

🔶 Abstract Class: Person

  • Fields:
    • String id
    • String name
  • Abstract Method: void displayInfo()

🩺 Class: Doctor extends Person

  • Extra Fields:
    • String specialty
  • Implements displayInfo()

🧑‍⚕️ Class: Patient extends Person

  • Extra Fields:
    • int age
    • ArrayList<Appointment> history
  • Implements displayInfo()
  • Methods:
    • addToHistory(Appointment appointment)
    • getHistory()

📅 Class: Appointment

  • Fields:
    • String appointmentId
    • Patient patient
    • Doctor doctor
    • String dateTime
    • boolean isCompleted
  • Methods:
    • markAsCompleted()
    • displayInfo()

🏥 Class: HospitalService

Handles logic for:

  • Adding doctors and patients
  • Scheduling appointments
  • Marking appointments as complete
  • Listing doctor/patient info
  • Viewing patient appointment history

🖥️ Class: Main

Menu options:

===== Hospital Menu =====
1. Add Doctor
2. Add Patient
3. Schedule Appointment
4. Complete Appointment
5. View Doctor Info
6. View Patient History
7. Exit

📦 Project Structure

src/ ├── Main.java ├── model/ │ ├── Person.java │ ├── Doctor.java │ ├── Patient.java │ ├── Appointment.java ├── service/ │ └── HospitalService.java

🧪 Example Workflow

Add Doctor Enter name: Dr. Smith Enter specialty: Cardiology

Add Patient Enter name: Alex Enter age: 22

Schedule Appointment Enter patient ID: P001 Enter doctor ID: D001 Enter date and time: 2025-06-03 10:30

Complete Appointment Enter appointment ID: A001

View Patient History [Shows all completed appointments for that patient]