Groovy Programming Fundamentals - Getting Started with POGOs, Closures, and Collections (2015)

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.

Introduction
Welcome
Groovy and Other Non-Java Languages On The JVM

Installing Groovy
Installing Groovy
Running a "Hello, World" Script
Running Groovy from Java
Asserts, Imports, and Def

Numbers and Strings
Integer and Floating Point Types
Operator Overloading
Strings and Groovy Strings
Multiline Strings and the "Slashy" String Syntax for Regular Expressions

Plain Old Groovy Objects (POGOs)
A Lot of Power From Little Code

Collections
Groovy Ranges and Lists
Maps and Sets

Basics of Closures
Iterating Using Closures
Transforming Collections with the Collect Method
Demo: Accessing the Google Geocoder Web Service
Demo: Accessing the ICNDB Web Service

Miscellaneous Operators and Techniques
Safe Navigation, Spaceship Operator, and Elvis

Demonstrations
Demo: Sorting Strings
Demo: Summing Numbers
Demo: Closures As A Filter
Demo: Processing Web Pages
Demo: Printing Padded Binary Strings