This book is a hands-on programming guide designed for developers who are fluent in Java and want to gain working knowledge of Kotlin. Whether you're maintaining Java systems or adopting Kotlin for Android, backend, or cross-platform development, this book teaches Kotlin in a way that leverages your existing understanding of Java's syntax and structure.
The book opens with the basics of Kotlin types, expressions, and control flow—mapping each feature to its Java counterpart to build fluency quickly. You'll then explore object-oriented and functional programming constructs, understand how Kotlin improves null handling, and learn when and how to apply Kotlin's concise features like extension functions, coroutines, DSLs, and smart casting.
You’ll also learn how Kotlin interoperates with Java, configure Kotlin in Maven and Gradle projects, and use modern Kotlin tooling. Later chapters cover Kotlin's use in backend and cross-platform applications, giving you a rounded understanding of how and where to apply the language effectively.
By the end of the book, you’ll be able to read and write idiomatic Kotlin, refactor Java code, and structure Kotlin projects with confidence.

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Spis treści

Kotlin for Java Developers. Confidently transition from Java to Kotlin through hands-on examples and idiomatic Kotlin practices eBook -- spis treści

• 1. An Introduction to Kotlin and Its Basic Types
• 2. Interoperability, Gradle, and Maven
• 3. Null and Non-Nullable Types
• 4. Extension Functions and the Apply Function
• 5. Object-Oriented Programming Basics
• 6. Generics and Variance
• 7. Data and Sealed Classes
• 8. Basics of Functional Programming
• 9. Lambda
• 10. Collections and Sequences
• 11. Coroutines
• 12. Synchronous and Asynchronous Programming
• 13. Kotlin Testing
• 14. Domain-Specific Languages in Kotlin