✈️ Java Airplane Simulator

A console-based airplane system simulation developed using core Java. This semester project demonstrates Object-Oriented Programming (OOP), multithreading, synchronization, and file logging to mimic real-time aircraft behavior such as takeoff, navigation, fuel monitoring, and landing.

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🚀 Introduction

This Java-based simulator models a basic aircraft system with realistic components and behaviors. It focuses on solid OOP design patterns including inheritance, composition, and aggregation, and incorporates multithreading to simulate concurrent real-world events like fuel consumption and location updates. All key actions are logged to a file using a custom logger.

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🎯 Objectives

• Apply OOP principles in a real-world-inspired simulation
• Demonstrate Java multithreading and synchronization
• Handle concurrent events safely using thread control
• Log system activities using file handling techniques
• Build modular, testable code architecture

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🧱 System Components & Class Structure

Class	Responsibility
Vehicle	Superclass for all transport types with shared fields like name and capacity
Engine	Controls airplane engine state (start/stop)
FuelTank	Monitors and manages fuel levels with alerts and thread-safe access
Navigation	Tracks current and destination coordinates, with synchronized methods
Cockpit	Orchestrates the entire flight process, managing threads and systems
Airplane	Main class combining all subsystems (Engine, FuelTank, Navigation, etc.)
fuelTankThread	Background thread that continuously decreases fuel during flight
navThread	Updates current location coordinates during flight in real time
Logger	Writes all major actions (e.g., takeoff, low fuel alerts) to log.txt
Main	Menu-driven interface for user interaction (start/stop flight, fuel check, etc.)

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⚙️ OOP Concepts Used

• Encapsulation: Each component exposes only necessary data via methods
• Inheritance: Airplane inherits from Vehicle
• Composition: Airplane contains Engine, Cockpit, and FuelTank
• Aggregation: Navigation has a reference to the Airplane (looser coupling)

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🧵 Multithreading & Synchronization

• fuelTankThread: Simulates real-time fuel consumption with periodic updates
• navThread: Simulates location updates during flight
• Synchronization: Critical sections are synchronized to ensure thread safety

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📝 Logging

Every important action is timestamped and saved to log.txt using the Logger class:

Logger.log("Plane took off from A to B");