Kenneth Kousen

Founder, KousenIT

Ken Kousen is a Java Champion, Oracle Groundbreaker Ambassador, and a Grails Rock Star. He is the author of the O'Reilly books “Kotlin Cookbook”, “Modern Java Recipes”, and “Gradle Recipes for Android”, and the Manning book “Making Java Groovy”. He also has recorded over a dozen video courses for the O'Reilly Learning Platform, covering topics related to Android, Spring, Java, Groovy, Grails, and Gradle.

In 2013, 2016, and 2017 he won a JavaOne Rockstar award. His academic background include BS degrees in Mechanical Engineering and Mathematics from M.I.T., an MA and Ph.D. in Aerospace Engineering from Princeton, and an MS in Computer Science from R.P.I. He is currently President of Kousen IT, Inc., based in Connecticut.

 

Talks on Wurreka:

The fundamental testing libraries in Java have undergone complete redesigns in the past few years. JUnit 5 redesigns the most well-known tool in all of testing. The most popular mocking library, Mockito, has also been rebuilt. This talk will demonstrate the new features, how they are intended to be used, and discuss experimental ideas in the pipeline.

JUnit has been remarkably stable over the years and is one of the most widely adopted frameworks in the Java world. The latest version, JUnit 5, takes JUnit to the next level. Full of new features like conditional test execution, parametric testing, labeling and filtering tests, and more, it brings all the modern thinking on testing into the JUnit world. It also takes advantage of the functional features added to Java since version 8 to create a powerful, new library for testing your code. With the release of Mockito 3, the mocking library now requires functional features from Java 8 and takes advantage of them in interesting ways. This talk will demonstrate both libraries, and briefly discuss popular alternatives.

Java is now on a six-month release schedule, with new features being added all the time. This talk summarizes the features that have been added to Java, including modules, jshell, collection factory methods, private methods in interfaces, new annotations and more. The goal is to show not only what has been added, but why and where to use them.

Additional topics will include Local Variable Type Inference, the new HTTP client, the enhanced switch expressions, and more. If time allows, coverage of preview features like records and text blocks will be included.

Java is now on a six-month release schedule, with new features being added all the time. This workshop will show the most important features that have been added to Java, including functional features like streams, lambda expressions, and method references, and from there discusses modules, jshell, collection factory methods, private methods in interfaces, new annotations and more. The goal is to demonstrate not only what has been added, but why and where to use them.

Additional topics will include Local Variable Type Inference, the new HTTP client, the enhanced switch expressions, and more. If there is interest, coverage of preview features like records and text blocks will be included.

Groovy 3 represents the biggest update to the Groovy programming language in years. The move to the Parrot Parser allows all Java features to be supported, including the syntax for lambdas and method references. New operators, like !in, !instanceof, and Elvis assignment have been added. Better Java integration makes Groovy perfect for enhancing existing Java systems with Groovy capabilities, like XML and JSON parsing and generation, collections capabilities, and more.

Groovy continues to grow and is still the most widely supported alternative language on the JVM. Now that it is established as an Apache project, the number of downloads and integrations into Java systems has only grown with time. The Groovy ecosystem, including Grails 4, Spock, Gradle, and more, is still actively supported as well.

This talk will examine features of Kotlin at a greater depth than most tutorials. Coroutines – the most popular feature of the language – will be covered, as well as higher order functions, reduction operations like reduce and fold, and lambdas with receivers. Those topics progress toward building DSLs and builders in Kotlin. Terms like “apply”, “let”, “use”, “also”, and “with” will be covered along with their typical use cases.

Details of the type system, including the Any, Unit, and Nothing classes, will be included. Examples will be provided on how to define extension functions, infix operators, and inlining functions for efficiency.

Kotlin is the definitive language for Android development, but it can be used anywhere a Java Virtual Machine is available. This workshop starts with the basics of Kotlin, like null safety, immutable collections, and data classes, and then reviews several advanced features, from destructuring to extension functions to sequences and more.

Good discussions are supposed to diverge from their intended path. Free association is a feature, not a bug, and helps you see new connections between ideas. Without structure, however, it can be difficult to add context to new ideas and understand how they relate to more immediate problems. This talk discusses the technique of mental bookmarks – how to remember where you were when a discussion diverged. In addition to giving you a reputation for having an amazing memory, the skill also helps with personal awareness in general.

To give the technique context, we'll look at the fractal nature of success – the way we tend to see our current environment in relative terms, always comparing ourselves to those slightly more successful and slightly less successful.

The deep-dive workshop presents why conflicts with your manager are inevitable based on differences in priorities and perspectives, and how to plan for them. The goal is to show you how to build the loyalty relationship that allows you to get what you need when you need it.

Topics covered will include diagnosing communication styles, lessons from game theory, working within the organizational hierarchy, and lessons on how to build a relationship with your manager that still allows you the freedom to express yourself and what you really want.

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