There are many professional newsletters through which it is possible to keep up-to-date with the Java programming language. Trying to pick the best, I came up with this post.
The JavaSpecialists Newsletter
This professional newsletter exists for more than 20 years. It usually includes professional articles written by Dr Heinz Kabutz, its editor. It is a high quality newsletter and you can subscribe it for free at https://www.javaspecialists.eu/archive/subscribe. The issues of this newsletter are published every 1-2 months.
The Baeldung Java Web Newsletter
This professional newsletter includes articles written by various authors and is managed by Eugene Paraschiv. This newsletter focuses on the Spring framework and on topics related to developing the server side of web applications in Java. The issues of this newsletter are published every week. You can subscribe for free at https://www.baeldung.com/java-web-weekly.
The Oracle Java Magazine Newsletter
If you happen to know a professional Java newsletter that match with these ones please let ujs know and we will be more than happy to consider adding it.