This repository has helped me refresh my logic and knowledge of Java. It contains practical exercises and code examples to reinforce fundamental concepts. My progress includes:

• Basic level: Variables, loops, and methods.
• Object-Oriented Programming (OOP): Classes, inheritance, and interfaces.
• Testing: Unit tests and mocks with JUnit and Mockito.
• Developed everything in Eclipse IDE for Java Developers (version 2024-09, 4.33.0), dedicating 3 weeks to small daily exercises.
• Leveraged Claude Sonnet 4 to clarify doubts and accelerate learning.

My goal has been to consolidate the coding and logic knowledge I had previously learned but needed to refresh.

• ✅ Step-by-step practical exercises
• ✅ Examples that gave me confidence and security in my logic
• ✅ Testing as the most forgotten part, covering unit tests, mocks, Mockito, and JUnit
• ✅ Logical progression and concept consolidation

Java-Fundamentals-Practice/
├── basics/                # Basic fundamentals: variables, loops, methods
├── fundamentals/          # Essential concepts: input/output, strings
├── oop-basics/            # Basic OOP: classes, inheritance, interfaces
├── collections/           # Introduction to collections: lists, maps
├── exception/             # Basic exception handling
├── testing/               # Unit tests and mocks with JUnit and Mockito
└── README.md              # Documentation

Category	Technologies
Language
Testing	unit & mock testing
Tools

basics → fundamentals → oop-basics → collections-intro → exception-handling → testing-basics

git clone https://github.com/isnaval/Java-Fundamentals-Practice.git

• Java 17 or higher installed
• Recommended IDE (Eclipse, IntelliJ IDEA, VS Code) - I used Eclipse
• Basic prior programming knowledge (recommended)

This is a personal learning repository, but improvements and suggestions are welcome. Let me know if you add anything so I can learn from it.

This project is available as open source under the MIT License.