Geolocation-Based-Event-Finder

Location-based task management system in Java. Features GPS-based task filtering, distance calculations using Haversine formula.

Location-Based Task Manager

A Java application for managing tasks with geolocation features. Tasks can be filtered and sorted by proximity to your current location using the Haversine formula.

Features

• ✅ Add tasks with GPS coordinates
• ✅ Filter pending tasks
• ✅ Sort tasks by distance using Haversine formula
• ✅ Mark tasks as completed
• ✅ Display all tasks with location data

Architecture

src/main/java/com/locationtask/

├── Task.java # Task model with location data

├── LocationUtils.java # Haversine distance calculation

├── TaskManager.java # Core business logic (filtering & sorting)

└── Main.java # Demo application and testing

How to Run

On Linux/Mac:

cd src/main/java

javac com/locationtask/*.java

java com.locationtask.Main

On Windows (PowerShell):

cd src\main\java

javac com\locationtask\Task.java

javac com\locationtask\LocationUtils.java

javac com\locationtask\TaskManager.java

javac com\locationtask\Main.java

java com.locationtask.Main

Sample Output

✓ Task added: Grocery Shopping

✓ Task added: Gym Session

✓ Task added: Coffee Meeting

✓ Task added: Library Visit

=== ALL TASKS ===

Grocery Shopping - Buy groceries at Market (Coords: 12.9716, 77.5946)

​ Gym Session - Workout at Fitness Center (Coords: 12.9352, 77.6245)

​ Coffee Meeting - Meet client at Cafe Coffee Day (Coords: 12.9698, 77.7997)

​ Library Visit - Return books at Central Library (Coords: 13.0001, 77.5769) ​

=== TASKS BY DISTANCE (from 12.97, 77.59) ===

Grocery Shopping - Distance: 0.50 km

Gym Session - Distance: 4.20 km

Library Visit - Distance: 5.10 km

Coffee Meeting - Distance: 18.30 km

Technologies Used

• Language: Java 8+
• Features: Streams, Lambda Expressions, Collections Framework
• Algorithm: Haversine Formula for GPS distance calculation

Learning Outcomes

• Object-Oriented Programming (OOP)
• Java Streams and Functional Programming
• Geospatial calculations
• Design patterns (Manager pattern)

Future Enhancements

• Database integration (SQLite/MySQL)
• REST API using Spring Boot
• Android app integration
• Real-time location tracking
• Task notifications

Author

@csmdg7 - Chetana Srinivasa Murthy

License

MIT License - feel free to use and modify