Video Description
Learn the advantages of using Groovy by itself and with existing Java projects. This video workshop takes you into the heart of this JVM language and shows you how Groovy can help increase your productivity through dynamic language features similar to those of Python, Ruby, and Smalltalk.
Presenter and Java consultant Ken Kousen demonstrates how writing anything from a simple build script to a full scale application is much easier with Groovy than with Java. You’ll quickly learn how to add Groovy to your projects, and then explore the language through a host of examples and demonstrations.
Once you complete this course, check out Ken’s other videos on the subject: Practical Groovy and Mastering Groovy.
- Walk through Groovy’s basic data types
- Use the “slashy” string syntax to define regular expressions
- Learn how operator overloading in the libraries simplifies your code
- Control and customize all the natural defaults and autogenerated code in POGOs
- Get demonstrations on using closures, and mixing Java and Groovy classes together
- Know when and how to use Abstract Syntax Tree (AST) transformations
- Parse and generate both XML and JSON
- Access RESTful web services with ease
Ken Kousen, President of Kousen IT, Inc., is a technical trainer, mentor, and consultant in all areas related to Java, specializing in Android, Spring, Hibernate/JPA, Groovy, and Grails. He is the author of Making Java Groovy (Manning) and the upcoming O’Reilly book, Gradle for Android.
Table of Contents
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Introduction
- Welcome 00:01:08
- Groovy and Other Non-Java Languages On The JVM 00:05:07
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Installing Groovy
- Installing Groovy 00:09:39
- Running a "Hello, World" Script 00:10:28
- Running Groovy from Java 00:10:38
- Asserts, Imports, and Def 00:10:58
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Numbers and Strings
- Integer and Floating Point Types 00:05:34
- Operator Overloading 00:06:31
- Strings and Groovy Strings 00:12:26
- Multiline Strings and the "Slashy" String Syntax for Regular Expressions 00:10:34
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Plain Old Groovy Objects (POGOs)
- A Lot of Power From Little Code 00:19:33
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Collections
- Groovy Ranges and Lists 00:10:49
- Maps and Sets 00:13:09
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Basics of Closures
- Iterating Using Closures 00:16:04
- Transforming Collections with the Collect Method 00:10:03
- Demo: Accessing the Google Geocoder Web Service 00:15:09
- Demo: Accessing the ICNDB Web Service 00:09:30
- Miscellaneous Operators and Techniques
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Demonstrations
- Demo: Sorting Strings 00:16:47
- Demo: Summing Numbers 00:11:02
- Demo: Closures As A Filter 00:09:02
- Demo: Processing Web Pages 00:05:21
- Demo: Printing Padded Binary Strings 00:04:38