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Groovy 2 Cookbook

You're reading from   Groovy 2 Cookbook Java and Groovy go together like ham and eggs, and this book is a great opportunity to learn how to exploit Groovy 2 to the full. Packed with recipes, both intermediate and advanced, it's a great way to speed up and modernize your programming.

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Product type Paperback
Published in Oct 2013
Publisher Packt
ISBN-13 9781849519366
Length 394 pages
Edition 1st Edition
Languages
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Authors (2):
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Luciano Fiandesio Luciano Fiandesio
Author Profile Icon Luciano Fiandesio
Luciano Fiandesio
Andrey Adamovich Andrey Adamovich
Author Profile Icon Andrey Adamovich
Andrey Adamovich
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Table of Contents (17) Chapters Close

Groovy 2 Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. Getting Started with Groovy 2. Using Groovy Ecosystem FREE CHAPTER 3. Using Groovy Language Features 4. Working with Files in Groovy 5. Working with XML in Groovy 6. Working with JSON in Groovy 7. Working with Databases in Groovy 8. Working with Web Services in Groovy 9. Metaprogramming and DSLs in Groovy 10. Concurrent Programming in Groovy Index

Inheriting constructors in Groovy classes


In Java, class inheritance doesn't support the inheriting of constructors for a number of good reasons (leaving the details of constructing an object to the programmer is generally a good idea). There are times when automatically inheriting the constructors of a class would be really useful and make the code less verbose. One of these cases is when inheriting from a class that extends Exception, where all the constructors are just calling super. Groovy has a convenient annotation for doing just that, @InheritConstructors.

In this recipe, we will explore how to use this annotation.

How to do it...

Let's demonstrate the features that the @InheritConstructors annotation gives:

  1. Create an Exception class: one of the classes that are used to communicate that something is horribly wrong with the code or the data:

    class BusinessException extends Exception {
    
    }
  2. Try to instantiate the class using one of the default constructors of the Exception class, for instance...

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