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Kotlin Programming Cookbook

You're reading from   Kotlin Programming Cookbook Explore more than 100 recipes that show how to build robust mobile and web applications with Kotlin, Spring Boot, and Android

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Product type Paperback
Published in Jan 2018
Publisher
ISBN-13 9781788472142
Length 434 pages
Edition 1st Edition
Languages
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Authors (2):
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Aanand Shekhar Roy Aanand Shekhar Roy
Author Profile Icon Aanand Shekhar Roy
Aanand Shekhar Roy
Rashi Karanpuria Rashi Karanpuria
Author Profile Icon Rashi Karanpuria
Rashi Karanpuria
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Toc

Table of Contents (16) Chapters Close

Preface 1. Installation and Working with Environment FREE CHAPTER 2. Control Flow 3. Classes and Objects 4. Functions 5. Object-Oriented Programming 6. Collections Framework 7. Handling File Operations in Kotlin 8. Anko Commons and Extension Function 9. Anko Layouts 10. Databases and Dependency Injection 11. Networking and Concurrency 12. Lambdas and Delegates 13. Testing 14. Web Services with Kotlin 15. Other Books You May Enjoy

Using try–catch as an expression

Exceptions in Kotlin are both similar and different compared to those in Java. In Kotlin, Throwable is the superclass of all the exceptions, and every exception has a stack trace, message, and an optional cause.

The structure of try–catch is also similar to that used in Java. In Kotlin, here's how a try–catch statement looks:

try {
// some code to execute
}
catch (e: SomeException) {
// exception handler
}
finally {
// optional finally block
}

At least one catch block is mandatory and the finally block is optional, and so it can be omitted.

In Kotlin, try–catch is special as it enables it to be used as an expression. In this article, we will see how we can use try–catch as an expression.

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