Java Programming Techniques

This repository contains Java projects developed during the university course Fundamental Programming Techniques at the Technical University of Cluj-Napoca.

The projects emphasize Object-Oriented Programming, clean architectural design, GUI development, reflection, serialization, and database interaction.

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PT_Assignment1 – Task Management System

A desktop application designed to manage tasks assigned to employees in a software company.

Architecture & Design

• Object-Oriented Design
• Sealed abstract classes
• Composite Design Pattern (ComplexTask composed of SimpleTask)
• Java Swing graphical user interface
• Data persistence using Serialization

Core Concepts

• Inheritance and polymorphism
• Collections Framework (Map, List)
• Status-based task processing
• Modular class structure

Functionalities

• Add employees
• Create simple and complex tasks
• Assign tasks to employees
• Modify task status (Completed / Uncompleted)
• Calculate employee work duration
• Generate task statistics per employee
• Filter employees with workload greater than 40 hours

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PT_Assignment2 – UML-Based Object-Oriented Application

A Java desktop application designed to manage and process domain-specific entities through a graphical user interface, following a structured object-oriented architecture.

Architecture & Design

• Structured object-oriented architecture
• Clear separation of responsibilities between components
• Modular package organization
• GUI-driven interaction layer

Core Concepts

• Encapsulation and abstraction
• Class relationships (associations and compositions)
• Separation between data handling and application logic
• Maintainable and extensible code structure

Functionalities

• User interaction through graphical interface
• Entity management according to UML specifications
• Structured data processing through well-defined class responsibilities

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PT_Assignment3 – Orders Management System

A layered Java application for managing client orders within a warehouse environment, integrated with a relational database.

Architecture

• Layered Architecture:
  • model
  • businessLayer
  • dataAccessLayer
  • presentation
• MySQL relational database
• JDBC connectivity

Advanced Concepts

• Generic Data Access Layer using Java Reflection
• Dynamic query generation
• Immutable domain model using Java records (Bill entity)
• Lambda expressions and Streams
• JTable dynamic table generation
• Transaction handling for order processing

Functionalities

• Add / Edit / Delete Clients
• Add / Edit / Delete Products
• Create Orders with stock validation
• Automatic stock update after order placement
• Bill generation and storage in a dedicated Log table

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Technologies Used

• Java
• Swing
• MySQL
• JDBC
• Reflection
• Java Streams & Lambda Expressions
• Serialization
• Object-Oriented Programming# Java-Programming-Techniques