Gaston C. Hillar - Java 9 with JShell

Daniel Mhlbachler got interested in computer science shortly after entering high school, where he later developed web applications as part of a scholarship system for outstanding pupils.

He has a profound knowledge of web development (PHP, HTML, CSS/LESS, and AngularJS), and he has worked with a variety of other programming languages and systems, such as Java/Groovy, Grails, Objective-C and Swift, Matlab, Julia, C (with Cilk), Node.js, and Linux servers.

Furthermore, he works with some database management systems based on SQL and also some NoSQL systems, such as MongoDB and SOLR; this is also reflected in several projects that he is currently involved in at Catalysts GmbH.

After studying abroad as an exchange student in the United Kingdom, he completed his bachelor's degree at the Johannes Kepler University in Linz, Austria, with a thesis on aerosol satellite data processing for mobile visualization; this is where he also became familiar with processing large amounts of data.

Daniel enjoys solving challenging problems and is always keen on working with new technologies, especially those related to the fields of big data, functional programming, optimization, and NoSQL databases.

More detailed information about his experience, as well as his contact details, can be found at www.muehlbachler.org and www.linkedin.com/in/danielmuehlbachler.

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I dedicate this book to my sons, Kevin and Brandon, and my wife, Vanesa

Preface

Java is definitely one of the most popular programming languages of this century. However, whenever we had to quickly explore new algorithms or new application domains, Java didn't provide us with a simple way of executing code snippets and print the results. As a result of this limitation, many developers started working with other programming languages that offered a REPL (Read-Evaluate-Print-Loop) utility, such as Scala and Python. However, many times, it was necessary to go back to Java after the exploratory phase finished and the requirements and the algorithms were clear.