The general structure of the reflection APIs is also similar to Java, but the details differ. You’ve moved beyond creating Java-equivalent code in Kotlin and are ready to enjoy some of Kotlin’s productivity features that can make your code more compact and readable. Kotlin by Mehmet Ali SICAK was created to introduce Kotlin to programmers. In order to call a function, you need to know the class in which it was defined, as well as its name and parameter types. Let’s slow down a bit and take a closer look at one of the most important parts of Kotlin: its type system. Nullable types and syntax for dealing with, Primitive types and their correspondence to the Java types, Kotlin collections and their relationship to Java. Coding with Kotlin means less hassle. Such errors can be troublesome for both users and developers. Developers want to get work done—and the less hassle, the better. Foreword by Andrey Breslav, Lead Designer of Kotlin. Book description. Foreword by Andrey Breslav, Lead Designer of Kotlin. But writing your own annotations, and especially writing the code that handles them, is less trivial. This book is the first and currently only Kotlin book in Turkish. You can use annotations to assign library-specific semantics to those classes; and reflection allows you to analyze the structure of the classes at runtime. Written for experienced Java developers, this example-rich book goes further than most language books, covering interesting topics like building DSLs with natural language syntax. We're looking forward to introducingyoutoKotlin,whichisanewprogramminglanguagethatisapragmatic,safe, Book Description Kotlin in Action guides experienced Java developers from the language basics of Kotlin all the way through building applications to run on the JVM and Android devices. Kotlin in Action guides experienced Java developers from the language basics of Kotlin all the way through building applications to run on the JVM and Android devices.. About the Technology. Annotations and reflection give you the power to go beyond that and to write code that deals with arbitrary classes that aren’t known in advance. Nullability is a feature of the Kotlin type system that helps you avoid NullPointer-Exception errors. Another version is a message like “Unfortunately, the application X has stopped,” which often also conceals a NullPointerException as a cause. Developers want to get work done – and the less hassle, the better. Summary. A real example of a Kotlin project ; Up to this point, you’ve seen many features for working with classes and functions, but they all require you to specify the exact names of classes and functions you’re using as part of the program source code. Using reflection to introspect classes at runtime. The syntax for using annotations is exactly the same as in Java, whereas the syntax for declaring your own annotation classes is a bit different. By now, you’ve seen a large part of Kotlin’s syntax in action. About the Technology Developers want to get work done - and the less hassle, the better. Let’s slow down a bit and take a closer look at one of the most important parts of Kotlin: its type system. Compared to Java, Kotlin’s type system introduces several new features that are essential for improving the reliability of your code, such as support for nullable types and read-only collections. Applying annotations is straightforward. Summary Kotlin in Action guides experienced Java developers from the language basics of Kotlin all the way through building applications to run on the JVM and Android devices. As a user of a program, you’ve probably seen an error message similar to “An error has occurred: java.lang.NullPointerException,” with no additional details. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. It also removes some of the features of the Java type system that have turned out to be unnecessary or problematic, such as first-class support for arrays. Kotlin in Action teaches you to use the Kotlin language for production-quality applications. Kotlin in Action guides experienced Java developers from the language basics of Kotlin all the way through building applications to run on the JVM and Android devices. Published on the 17 July 2017, Kotlin covers a broad spectrum of topics from Kotlin and Innovations, Kotlin and Java, Kotlin and Android, what can be done with Kotlin, and working with null data in Kotlin. Up to this point, you’ve seen many features for working with classes and functions, but they all require you to specify the exact names of classes and functions you’re using as part of the program source code. Let’s look at the details. Welcome Thanks for purchasing the MEAP for Kotlin in Action! About the book. Coding with Kotlin means less hassle.