Java & Object-Oriented Programming

This repository contains code examples and exercises used in a Java and Object-Oriented Programming (OOP) training session I delivered to my coworkers in 2021-2022.

The goal of the training was to strengthen understanding of Java fundamentals and core OOP principles through practical, hands-on learning.

The theoretical material can be found here (in Portuguese): Orientação a Objetos.

About the Training

The training covered:

• Java language basics
• Object-oriented concepts and best practices
• How to design, structure, and implement maintainable code in Java
• Practical examples to reinforce theory

Each .java file in this repository focuses on a specific topic, keeping the examples clear and self-contained.

Topics Covered

• Java Basics
  • Variables and data types
  • Control structures (if, switch, loops)
  • Methods and parameter passing
  • Arrays and collections
• OOP Fundamentals
  • Classes and objects
  • Encapsulation (getters, setters, access modifiers)
  • Inheritance and composition
  • Polymorphism and method overriding
  • Abstraction with abstract classes and interfaces
• Advanced OOP Concepts
  • Constructors and overloading
  • Static members and constants
  • final keyword usage
  • Inner classes
  • Best practices for class design
• Java-Specific Features
  • toString(), equals() and hashCode()
  • Working with List, Map, and Set
  • Exception handling (try, catch, finally, throw, throws)
  • Packages and imports