JetBrains TV

Robert C. Martin (Uncle Bob) shows some refactoring techniques transforming a “large and ugly” function into a clean and readable piece of Java code, using IntelliJ IDEA and refactorings such as Rename, Extract Method, Inline Variable, Introduce Field, etc.

This screencast demonstrates how to use Spock testing specifications and Groovy for mocking and stubbing behavior in unit tests. It covers creating the mock object syntax, setting expectations, verifying and spying on results, and argument matchers. 

Apache Struts 2 support in IDEA: basic navigation and autocompletion showcase

This screencast demonstrates IDEA's static code analysis features and how to write your own rule using Structural Search & Replace. I'll give you a quick overview of IDEA inspections, show you how to use Structural Search, and then demonstate creating a new inspection and quick fix based on this search.