Mastering Kotlin Object Oriented Programming

Mastering Kotlin Object-Oriented Programming

Mastering Kotlin OOP isn't just a reference, it's your definitive playbook for crafting scalable, maintainableKotlin applications. From enforcing immutability with val to modularizing vastcodebases, this book guides you through every facet of modern Kotlindevelopment. You'll learn how to apply SOLID principles and Clean Architecture, harness coroutines for structured concurrency, and build thread-safe, production-ready libraries that stand the test of time. What You'll Learn ✔ Single-Responsibility & Open-Closed Design - Decompose complex classes into focused collaborators using interfaces, abstract classes, and data classes - Extend behavior safely with sealed hierarchies, mix-ins, and Kotlin's override keyword - Leverage custom getters/setters and backing properties to encapsulate validation and invariants ✔ SOLID & Clean Architecture in Kotlin - Apply Liskov, Interface Segregation, and Dependency Inversion to your service and data layers - Structure code into domain, data, and presentation modules with strict inward-pointing dependencies - Swap implementations without modifying clients via repository and use-case interfaces ✔ Generics, Variance & Type Safety - Master generic classes and methods with T, K, V type parameters and where clauses - Model covariance (out) and contravariance (in) for producer/consumer APIs - Use reified inline functions to perform runtime type checks without reflection tokens ✔ Coroutines, Structured Concurrency & Thread Safety - Expose suspending functions on interfaces and inject well-scoped CoroutineScope instances - Compose async workflows with async/await, supervisorScope, and actor-based state machines - Protect shared data using @Synchronized, AtomicFU delegates, and volatile properties ✔ Immutability, State Management & Modularization - Design fully immutable classes with val, defensive copies, and persistent collections - Enforce invariants at construction with require, factory methods, and builders - Break monoliths into feature, domain, and infrastructure modules; hide internals using internal and private ✔ Testing Strategies: JUnit, MockK & Integration - Write fast, deterministic unit tests with JUnit 5 and @ParameterizedTest - Mock dependencies and verify interactions using MockK's every, verify, and coroutine support - Elevate confidence with integration tests using Testcontainers, Spring Boot's test slices, and CI-driven pipelines Who This Book Is For - Kotlin developers looking to level up from scripts and small apps to enterprise-grade systems - Architects defining module boundaries, clean APIs, and dependency graphs in large teams - Android and backend engineers who need non-blocking, coroutine-driven architectures that remain testable - Library authors building reusable, thread-safe components with zero-overhead abstractions - DevOps and platform teams packaging and distributing Kotlin modules across microservice fleets Packed with hands-on examples, real-world case studies, and actionable best practices, Mastering Kotlin OOP & Architecture empowers you to build applications that are robust, extensible, and ready for any production challenge.

Mastering Kotlin

Explore popular language features, Java to Kotlin interoperability, advanced topics, and practical applications by building a variety of sample projects Key FeaturesUnderstand and leverage the syntax, tools, and patterns by writing code in KotlinExplore practical topics such as Java interop, concurrency with coroutines, and functional programmingDiscover how to use Kotlin for build targets like Android, iOS, JavaScript, and backend serviceBook Description Using Kotlin without taking advantage of its power and interoperability is like owning a sports car and never taking it out of the garage. While documentation and introductory resources can help you learn the basics of Kotlin, the fact that it’s a new language means that there are limited learning resources and code bases available in comparison to Java and other established languages. This Kotlin book will show you how to leverage software designs and concepts that have made Java the most dominant enterprise programming language. You’ll understand how Kotlin is a modern approach to object-oriented programming (OOP). This book will take you through the vast array of features that Kotlin provides over other languages. These features include seamless interoperability with Java, efficient syntax, built-in functional programming constructs, and support for creating your own DSL. Finally, you will gain an understanding of implementing practical design patterns and best practices to help you master the Kotlin language. By the end of the book, you'll have obtained an advanced understanding of Kotlin in order to be able to build production-grade applications. What you will learnModel data using interfaces, classes, and data classesGrapple with practical interoperability challenges and solutions with JavaBuild parallel apps using concurrency solutions such as coroutinesExplore functional, reactive, and imperative programming to build flexible appsDiscover how to build your own domain-specific languageEmbrace functional programming using the standard library and ArrowDelve into the use of Kotlin for frontend JavaScript developmentBuild server-side services using Kotlin and KtorWho this book is for If you’re a Kotlin developer looking to further their skills or a professional Java developer looking for better or professional resources in order to make a switch to Kotlin, this book is for you. Familiarity with Kotlin programming will assist with understanding key concepts covered in the book.

Mastering Kotlin