This article presents a way to structure a Spring Boot application in vertical modules and horizontal layers and shows you how to test the verticals and layers with the testing features provided by Spring Boot.
#java #testing #spring #springboot #junior #middle #senior
https://reflectoring.io/testing-verticals-and-layers-spring-boot/

Kotlin is popular, Kotlin is trendy. Kotlin gives you compile-time null-safety and less boilerplate. But is Kotlin better than Java? Check this interesting story of a project being written twice with a lot of evident examples and consider keeping them in mind.
#java #kotlin #middle
https://allegro.tech/2018/05/From-Java-to-Kotlin-and-Back-Again.html

Java EE 8 has been released and its release includes a significant amount of changes relevant to server-side Java developers. Take a look at the new tools that came with it, see how the transition to Jakarta EE is going, and what the future of enterprise Java holds for you.
#java #middle #senior
https://dzone.com/articles/java-ee-8-and-the-open-future-of-java-ee

If you are tired of all these beautiful patterns and best practices and you want to write something insane - read this one. Maybe you like horror stories but in code - this may appeal to you!
#java #forfun
https://www.e4developer.com/2018/05/13/how-to-write-horrible-java/

Collections have seen a lot of changes in the past couple of JDKs. Let's look at how they've improved in Java 9 and Java 10 and what the new ways of creating immutable ones are.
#java #java9 #java10 #collections #junior #middle
https://dzone.com/articles/java-collections-are-evolving

Together with the growing popularity of microservices and light-weight REST API, we are witnessing another trend in Java: the rise of Java Microframeworks. Javalin, Micronaut, Spark and many more make building REST APIs a breeze. In this article, the author looks at this exciting space and shares his opinions on their use.
#java
https://www.e4developer.com/2018/06/02/the-rise-of-java-microframeworks/

We all know that it is very hard to build that perfect endpoint that satisfies all clients needs. In this blog post it is explained how you can add GraphQL to your existing JAX-RS application, without too much effort.
#graphql #wildfly
https://www.javacodegeeks.com/2018/05/graphql-on-wildfly-swarm.html

New releases from the last week:
Elasticsearch 6.3.0 Released
#releases
https://www.elastic.co/blog/elasticsearch-6-3-0-released

The return type of a method can influence your code a lot. It is a valuable piece of information for your API, makes it easier to test a functionality and should be considered adequately every time.
#java #middle
https://www.javacodegeeks.com/2018/05/void-methods-as-behavior-black-holes.html

Are you wondering what to read to improve your knowledge of Java or become a better Java developer? In this article you can get familiar with the greatest Java books that have withstood the test of time.
#java #junior #middle
https://dzone.com/articles/10-all-time-great-books-for-java-programmers-best

Java 11 will soon be upon us in a few months. Let's take a look at some of the upcoming API Methods. Additionally you can check which methods have been removed from Thread class in JDK 11.
#java #java11
https://dzone.com/articles/api-updates-in-java-se-11-189

Wondering about the memory impact of your Java collections? To put it differently: if your Java application crashed with the infamous OutOfMemoryError or experienced long GC pauses — did you check its collections for memory waste? Here's how to think about your collections while keeping overhead in mind.
#java #collections #middle #senior
https://dzone.com/articles/preventing-your-java-collections-from-wasting-memo

Java 10 brings with it a host of changes and new features, but also some items to watch out for. In this article, you will go over some key ones and understand their impact on your code.
#java #middle #senior
https://dzone.com/articles/jdk-10-pitfalls-for-the-unwary

Struggling to make your Java application Cloud Native? In this article you can trace some really good advices to decrease memory footprint, improve startup time and in general, create an optimized Docker image using module system step-by-step.
#java #docker #cloud #middle #senior
https://medium.com/criciumadev/create-a-cloud-native-image-using-java-modules-a670be616b29

Wondering how to take up Kubernetes and Spring Boot when scalability and elasticity is a big requirement in your architecture? In this article you can learn how to use both to build microservices that are easy to scale up and down.
#java #microservices #kubernetes #spring #springboot
https://dzone.com/articles/building-elastic-microservices-with-kubernetes-and

New guide for containers from dzone
#containers #docker #kubernetes #middle
https://dzone.com/guides/containers-development-and-management

How do we define Java? Here is an extensive look at Java SE, JDK, and OpenJDK and how they have evolved with JDK 11.
#java #java11 #junior
https://dzone.com/articles/how-do-we-define-java

Building a full-fledged, production-ready registration for your web application is so much more than just putting together a simple registration page. Check these amazing series to get answers to essential questions before assembling a concrete account flow.
#spring #security #middle
http://www.baeldung.com/spring-security-registration

Need to use your streams over and over again? With this article you will cover three different approaches, their benefits, and their pitfalls when recycling Java streams.
#java #streams #middle #senior
https://dzone.com/articles/how-to-replay-java-streams

There is no doubt that Spring Framework is one of the most popular Java frameworks and makes it really easy to create real-world, enterprise-grade Java applications by providing features like dependency injection and inversion of control. Take one look at Spring's source code, and you can see the thought that went into the framework. Check out some best practices Java devs can learn from Spring.
#java #spring #middle
https://dzone.com/articles/3-best-practices-java-programmers-can-learn-from-s