Object-Oriented Programming (POO) - NOVA FCT ☕

Bachelor in Computer Science and Engineering (LEI) | 1st Year - 2nd Semester

This repository contains the projects developed for the Object-Oriented Programming course at the Faculty of Sciences and Technology of the NOVA University of Lisbon (NOVA FCT).

✍️ Authors

• Tomás Alves (Student No. 68681)
• José Freitas (Student No. 69078) - (Paintball Game Project)
• Felipe Magno (Student No. 67994) - (Office Calendar Project)

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📌 Project 1: Paintball Game

The official project assignment and specifications provided by the faculty can be found here:

• Project Statement Paintball (PDF)
• Project Code (SRC)

The project consists of building a turn-based strategy game in Java simulating a Paintball Game. The game is played by multiple teams on a rectangular grid map containing positions, bunkers, and players. The main goal of each team is to eliminate opposing teams while avoiding elimination, until only one winning team remains.

Main Features & Architecture

• Turn-Based Strategy: Alternates turns between different teams, managing multiple players per team.
• Map & Grid Management: Handles a rectangular grid with coordinate mapping $(x, y)$ for horizontal and vertical positions.
• Interactive Entities: Support for various map elements such as players and defensive structures (bunkers).
• Incremental Development: Developed following strict object-oriented design patterns and clean code standards.

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📌Project 2: Office Calendar System

The official project assignment and specifications provided by the faculty can be found here:

• Project Statement Callendar (PDF)
• Project Code (SRC)

An advanced Java application designed to manage office accounts, schedules, meetings, and priority events within an enterprise environment.

Main Features & Architecture

• Account Management: Supports different account types and hierarchies (Enterprise accounts, Managers, Staff, Guests) with custom permission controls (e.g., creating events, high-priority scheduling).
• Event & Invitation Control: Manages event creation, participant invitation lists, responses (accept/reject), and conflict handling (preventing overlapping schedules or handling mandatory participation rules).
• Robust Exception Handling: Implements a comprehensive custom exception hierarchy for constraint violations (e.g., AccountIsBusyError, AlreadyAcceptedAnotherInvitationError, AccountCannotCreateEventsError).
• Modular Design: Clear separation into packages handling calendars, accounts, events, invites, and commands.

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🧠 Concepts and Acquired Skills

Across these projects, the course heavily emphasized advanced Java principles:

• Advanced OOP Principles: Extensive use of interfaces, abstract classes (AbstractAccount, AbstractEnterprise), inheritance, and polymorphism.
• Encapsulation & Domain Modeling: Clean separation of concerns and data hiding across distinct entity classes.
• Exception Handling: Robust error management using custom application exceptions.
• Software Design: Applying modular architecture, design patterns, and clean code principles.

📄 License

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