Java by Design: Object-Oriented Programming for Real-World Applications

Write Clean, Scalable Java — the Way It Was Designed to Be Used.

Java by Design is your definitive guide to mastering object-oriented programming (OOP) in Java for building real-world, maintainable applications. Whether you’re new to Java or looking to sharpen your design skills, this book offers a hands-on approach to understanding classes, objects, inheritance, encapsulation, polymorphism, and more — all through clean architecture and real-life coding examples.

From enterprise software to mobile apps, you’ll learn how to apply proven OOP principles to design and build robust, modular, and testable Java applications.

🔧 What You’ll Learn:

✅ Java OOP fundamentals: classes, interfaces, and abstraction
✅ The SOLID principles applied in Java
✅ Design patterns: Factory, Singleton, Strategy, Observer, and more
✅ Building layered, modular, and reusable code
✅ Dependency injection and design flexibility
✅ Real-world examples and project case studies
✅ Unit testing and test-driven development (TDD) in Java
✅ Best practices for readable, scalable Java code
✅ Common pitfalls in Java OOP — and how to avoid them
✅ Application of OOP in web apps, APIs, and Android development