🏥 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.

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

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⏱ Duration

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

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✅ 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

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🧱 Requirements

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

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🧩 Classes

🔶 Abstract Class: Person

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

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🩺 Class: Doctor extends Person

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

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🧑‍⚕️ Class: Patient extends Person

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

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📅 Class: Appointment

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

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🏥 Class: HospitalService

Handles logic for:

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

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🖥️ 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

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📦 Project Structure

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

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🧪 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]

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