Vaccination Recommendation System

A Java console-based patient vaccination management system.
This project demonstrates object-oriented programming, encapsulation, and conditional logic through patient record handling and vaccine recommendations.

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Features

• Add patients with basic demographic info
• Store patients in a simple record system
• Generate vaccine recommendations based on age ranges
• Console-driven user interaction
• Demonstrates core Java OOP design patterns

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Architecture Overview

The system is composed of four main Java classes:

Patient.java

Represents an individual patient and stores:

• id
• name
• age
• vaccination status

Implements constructors, getters, and setters following encapsulation principles.

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PatientsRecord.java

Stores multiple Patient objects in an array.
Responsible for:

• Adding new patients
• Retrieving stored records
• Record validation and formatting

Acts as a lightweight in-memory patient database.

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RecommendedVaccine.java

Contains conditional rules to generate age-based vaccine recommendations, such as:

• Childhood vaccines
• Teen/young adult vaccines
• Adult vaccines
• Senior vaccines

Returns formatted recommendation strings for output.

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TestApplication.java

Console UI driver and application entry point.

Handles:

• User input via Scanner
• Menu options
• Linking record and recommendation logic
• Displaying formatted results to the screen

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Running the Application

Requirements

• Java 17+ (earlier versions likely compatible)
• Any IDE (IntelliJ, Eclipse, VS Code) or terminal

Compile + Run (Terminal)

javac *.java
java TestApplication