🐾 Pet Adoption System

A console-based Pet Adoption Management System built in Java that helps manage pets available for adoption, track adoption requests, and maintain adoption history.
The system demonstrates Object-Oriented Programming (OOP), File Handling, Sorting, and Admin Authentication concepts.

🚀 Features

🔐 Admin Login System
🐶 Add New Pets
📋 View Available Pets
🔍 Search Pets by Type (Dog / Cat)
📊 Sort Pets by Age
🍼 Pet Age Category
- Baby
- Adult
- Senior
💉 Vaccination Reminder System
❤️ Adoption Request System
✅ Admin Adoption Approval
🧾 Adoption History File
💾 Save Pet Data using File Handling

🛠️ Technologies Used

Java
Object-Oriented Programming (OOP)
ArrayList (Java Collections)
File Handling
Comparator Sorting
Console-based UI

📂 Project Structure

PetAdoptionSystem
│
├── Main.java
├── Admin.java
├── Pet.java
├── PetManager.java
├── AdoptionRequest.java
├── AdoptionApprovalManager.java
├── FileManager.java
├── pets.txt
└── adoption_history.txt

⚙️ How It Works

1️⃣ Admin Login

The system starts with an admin login for security.

Username: admin
Password: 1234

2️⃣ Add Pet

Admin can add pets with:

Name
Type (Dog/Cat)
Age
Vaccination status

Pet ID is generated automatically.

3️⃣ Search and Sort Pets

Users can:

Search pets by type
Sort pets by age

4️⃣ Adoption Request

Users submit an adoption request with:

Pet ID
Adopter Name

The request goes to the admin approval queue.

5️⃣ Adoption Approval

Admin can:

View adoption requests
Approve requests

Approved pets are marked as adopted.

6️⃣ Adoption History

Approved adoptions are stored in:

adoption_history.txt

Example:

PetID:101 Name:Rocky AdoptedBy:Amit
PetID:105 Name:Tom AdoptedBy:Rahul

💉 Vaccination Reminder

The system shows pets with:

none
pending

vaccination status.

Example:

Pets needing vaccination:

ID: 104 | Name: Bruno | Type: Dog | Vaccination: pending

🍼 Pet Age Categories

Pets are automatically categorized:

Age	Category
0–1	Baby
2–5	Adult
6+	Senior

▶️ How to Run

Clone the repository

git clone https://github.com/yogeshkumarsaini/Pet-Adoption-System.git

Open the project in IntelliJ / Eclipse / VS Code
Compile and run:

javac *.java
java Main

📌 Learning Concepts

This project demonstrates:

Object-Oriented Programming
Encapsulation
Class Design
File Handling
Collections Framework
Sorting Algorithms
Console Menu Systems

⭐ Future Improvements

Java Swing GUI Version
MySQL Database Integration
Online Pet Adoption Portal
Email Notification System
Multiple Admin Support
Pet Image Upload

👨‍💻 Author

Developed by Yogesh Kumar Saini

If you like this project, give it a ⭐ on GitHub!

yogeshkumarsaini/Pet-Adoption-System