Hospital Management System

This project is a console-based application for managing patients and doctors in a simple healthcare system. It allows users to sign up and log in to access features such as inputting patient and doctor details, editing details, booking appointments, and displaying lists of doctors. The project demonstrates object-oriented programming principles in Java, such as inheritance and encapsulation, by organizing people (patients and doctors) with shared attributes and distinct behaviors.

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💡 Features

1. User Authentication

• Signup: New users can create an account with a unique ID, username, and password.
• Login: Existing users can log in using their ID and password.

2. Patient Management

• Add Patient: Input personal details for a patient, such as name, contact number, and age.
• Edit Patient Details: Modify existing details for a patient by searching with their ID.
• Display Patient Details: View specific patient details based on ID input.

3. Doctor Management

• Add Doctor: Input personal details for a doctor, such as name, contact number, and age.
• Edit Doctor Details: Modify existing details for a doctor by searching with their ID.
• Display Doctor Details: View specific doctor details based on ID input.
• List All Doctors: Display all added doctors with their complete details.

4. Appointment Booking

• Allows a user to book an appointment between a patient and a doctor by providing both IDs.
• Verifies if both patient and doctor exist before confirming the booking.

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🛠️ Class Structure

1. LoginSignup Class

• Manages user login and signup.
• Stores user credentials in a 2D array for simplicity (up to 100 users).
• Provides a menu-driven interface for user options after login.

2. Person Class (Abstract)

• Serves as a base class for Patient and Doctor.
• Common fields: id, name, contactNumber, and age.
• Abstract method inputDetails() for child classes to implement specific input behavior.
• Concrete method displayDetails() to show details of each person.

3. Patient Class

• Extends the Person class, representing a patient in the system.
• Implements the inputDetails() method to gather patient-specific details from the user.

4. Doctor Class

• Extends the Person class, representing a doctor in the system.
• Implements the inputDetails() method to gather doctor-specific details from the user.

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📋 Usage Instructions

1. Compile and Run:

   • Compile the code using javac oopj.java.
   • Run the compiled code using java oopj.

2. Menu Options:

   • After logging in, the user can choose from the following options:
     • 1: Input Patient Details
     • 2: Input Doctor Details
     • 3: Display Details (search by ID)
     • 4: Book Appointment (enter Patient ID and Doctor ID)
     • 5: Display All Doctors
     • 6: Edit Patient Details (search by Patient ID)
     • 7: Edit Doctor Details (search by Doctor ID)
     • 8: Exit the system

3. Example Workflow:

   • A new user can select the Signup option to create an account.
   • After signup, the user logs in and is greeted with the main menu.
   • The user can then add patient and doctor details, book appointments, and manage records.

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💾 Data Management

• User Authentication Data: Stored in a 2D array (String[][] users), where each entry holds user ID, username, and password.
• Patient and Doctor Records: Managed using ArrayList<Patient> and ArrayList<Doctor>, allowing for flexible record storage and management.

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💻 Example Interaction

Choose an option:
1. Login
2. Signup
3. Exit
> 2

Enter your username:
> JohnDoe
Your ID is: U1
Choose a password:
> password123
Signup successful. You can now login.

Choose an option:
1. Login
2. Signup
3. Exit
> 1

Enter your ID:
> U1
Enter your password:
> password123
Login successful. Welcome, JohnDoe!

Choose an option:
1. Input Patient Details
2. Input Doctor Details
3. Display Details
4. Book Appointment
5. Display All Doctors
6. Edit Patient Details
7. Edit Doctor Details
8. Exit
> 1

Enter Patient's ID:
> P001
Enter Patient's Name:
> Alice Smith
Enter Patient's Contact Number:
> 1234567890
Enter Patient's Age:
> 30
Patient details added successfully.

Choose an option:
...

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🔍 Key Object-Oriented Concepts Demonstrated

1. Encapsulation:

   • Patient and Doctor details are encapsulated within their respective classes.
   • Access to fields is controlled through the inputDetails() and displayDetails() methods.

2. Inheritance:

   • Patient and Doctor inherit from the abstract Person class, sharing common properties and behavior.

3. Abstraction:

   • The abstract Person class enforces that each subclass (Patient and Doctor) must implement the inputDetails() method.

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🔧 Improvements and Future Enhancements

• Database Integration: Store user, patient, and doctor data in a database instead of using arrays and lists for persistent data storage.
• Enhanced Authentication: Add encryption for passwords and possibly multi-factor authentication.
• Appointment Scheduling: Introduce features for scheduling appointments with date and time management.
• GUI Interface: Develop a graphical user interface to replace the console-based interaction.

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📝 Dependencies

• Java Development Kit (JDK): Version 8 or later.
• Scanner Class: Used for console-based input.

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This project serves as an excellent demonstration of object-oriented programming principles applied to a real-world scenario. It’s perfect for beginners looking to understand Java OOP concepts through a hands-on, interactive console application.