Johan Janssen

Johan Janssen (@johanjanssen42) is a JavaOne Rock Star and a software architect at Sanoma Learning. He has been working for various fast-paced companies where rapidly delivering high-quality software is very important. He regularly writes articles and presents about various subjects, but he mainly focuses on Java.

Recent Blogs

It’s time to move your applications to Java 17. Here’s why—and how.

What you need to know about code migration from the previous Long-Term-Support versions of the platform: Java 11 and Java 8

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