Quick Review of Java Object-Oriented Programming Concepts

This documentation series provides a curated set of questions and detailed answers on essential Modern Java OOP topics. Each topic is presented as a standalone file and includes clear explanations, code examples, and best practices. The goal is to help students and developers solidify their conceptual understanding and prepare effectively for exams or technical interviews.

---

Table of Contents

• Home
• Questions

  • Encapsulation
  • Inheritance & Method Overriding
  • Method Overloading vs. Overriding
  • Abstract Classes vs. Interfaces
  • Polymorphism
  • Final Keyword
  • Override Annotation
  • Runtime Type Identification
  • Design Patterns
  • Interfaces & Functional Interfaces
  • Object Class Overrides
  • Static Keyword & Blocks
  • Exception Handling
  • Generics
  • Reflection API
  • Encapsulation (OOP)
  • Method Overriding & Overloading
  • Interfaces vs Abstract Classes
  • Final Keyword (Advanced)
  • Static Keyword
  • Exception Handling (Advanced)
  • Generics (Advanced)
  • Reflection API (Advanced)
  • Annotations
  • Lambda & Functional Interfaces
  • Streams & Collectors
  • Optional API
  • Date & Time API
  • Collections Framework
  • RTTI (Advanced)
  • Final Methods
  • Calculator Implementation
  • Animal Inheritance Example
  • Fibonacci Comparison
  • Tower of Hanoi
  • Collections Framework (Extended)

---

License Overview

All materials in this repository are licensed under the GNU General Public License v3.0 (GPLv3), © 2025 Navid Mohaghegh. Provided that you comply with the following conditions, you are granted the rights to Use, copy, and redistribute the content in any medium or format, or Modify, adapt, and build upon the material for educational use:

• Attribution: You must provide appropriate credit to the original author, Navid Mohaghegh
• License Inclusion: You must include a copy of the GPLv3 license with any redistributed or derivative work
• Copyleft: If you distribute modified versions, they must also be licensed under GPLv3

Disclaimer of Warranty and Liability:
This material is provided "as is", without warranty of any kind, express or implied. The author disclaims all liability for any damages arising from the use, misuse, or inability to use this material, to the fullest extent permitted by applicable law.

For the complete terms of the GNU GPL v3, please visit:
https://www.gnu.org/licenses/gpl-3.0.html