🗳️ Electronic Voting Machine (EVM) – Java OOP Project

Developed by: Yousuf
Language: Java (console-based application)
Implementation: Object-Oriented Programming using ArrayList

📌 Project Overview

This project simulates a simple Electronic Voting Machine (EVM) in Java.
It uses important OOP concepts such as Encapsulation, Inheritance, Abstraction, Polymorphism and makes use of Java Collections (ArrayList) to dynamically store Candidates and Voters.

The goal is to allow pre-registered voters to cast votes to the registered candidates, store the votes in ArrayLists, and display the election results at the end.

✅ Concepts Used

Concept	Explanation
Encapsulation	Private fields (voteCount, hasVoted) with public methods to access/mutate
Inheritance	Candidate and Voter inherit from base class Person
Polymorphism	displayDetails() method overridden in Candidate and Voter
Abstraction	VotingMachine (abstract) implemented by EVMSystem
Packages	common, candidate, voter, evm
ArrayList	Dynamic storage of all Candidate and Voter objects

🧱 Folder Structure

EVM_Project/
├── common/
│   └── Person.java
├── candidate/
│   ├── Candidate.java
│   └── CandidateManager.java
├── voter/
│   ├── Voter.java
│   └── VoterManager.java
├── evm/
│   ├── VotingMachine.java
│   └── EVMSystem.java
└── Main.java

⚙️ Features

Feature	Description
Candidate Registration	Add new candidates (name, ID, party)
Voter Registration	Add new voters (name, ID)
Voting	Voters cast vote using their ID and desired candidate ID
Validation	Only one vote per voter is allowed
Results Display	Shows vote counts and declares winner(s)
Dynamic Storage	Stores data in ArrayList, allowing unlimited growth at runtime

🧭 Program Flow

🧑‍💻 How to Run

Step 1 – Compile

javac -d . common/Person.java candidate/*.java voter/*.java evm/*.java Main.java

Step 2 – Run

java Main

🧭 REGISTER VOTER

🧭 CAST VOTE

✅ Example Output (Results Section)

---- Election Results ----
Ali Khan (Party A) - Votes: 3
Sara Ahmed (Party B) - Votes: 1
Winner: Ali Khan (Party A) with 3 votes.

📌 Notes

• This project uses ArrayList instead of normal arrays to store objects dynamically.
• It demonstrates how OOP + Java Collections can be used together in a real-world mini-project.
• Possible future improvements:
  • Admin login
  • File/database storage
  • GUI using Swing or JavaFX