Open Elements

July 14, 2020

#Java

#AdoptOpenJDK

AdoptOpenJDK Virtual Roadshow

AdoptOpenJDK is doing a virtual roadshow of the Java User Groups. We plan to reach as many groups as possible but we will also live stream the event on YouTube.

March 13, 2020

Hendrik Ebbers

#Java

#Cyberland

About Cyberland

Based on the given circumstances (COVID-19) the JavaLand conferences has been canceled. This was the only solution that made sense for the organizers. We can understand that a lot of visitors and speakers are sad about this news. Based on this the German JUG community is organzing a 100% remote conference called Cyberland

February 21, 2020

Hendrik Ebbers

#Java

#AdoptOpenJDK

How AdoptOpenJDK provides enterprise ready OpenJDK builds

With the new licence of the Oracle JDK a lot of companies need to switch to a new JDK vendor. With AdoptOpenJDK we have a community based alternative that provides free LTS JDK builds. In this post I will have a deeper look at the infrastructure of the AdoptOpenJDK and how each build is tested to offer production ready quality.

February 15, 2020

Hendrik Ebbers

#Java

Back to the future - with Java

Each year several Java applications might show wrong date information for the days around New Year's Eve. This post gives an overview about the problem and describes how you can easily avoid such bugs

December 10, 2019

Hendrik Ebbers

#Java

#OpenWebStart

How open source saved WebStart

Everyone who has developed Java desktop applications within the last 15 years used WebStart or at least heard about it. This post gives an overview how the technology evolves as an open source project after Oracle announced its removal from the Oracle JDK.

January 25, 2019

Hendrik Ebbers

#Java

#OpenJDK

How a single request can kill your enterprise

As developers we always try to create bug free and secure applications. Sometimes the most critical issues are not part of our code but of its dependencies. This post shows how security issues in dependencies can be used to create horrible attack scenarios of your systems. I will show one exploit in a simply Java based server application that can be used to do mostly everything with your whole system.

January 15, 2019

Hendrik Ebbers

#Java

#Rico

Server Timing with Rico

This post gives an overview about the new server timing specification of the w3c and how server timing can be used in any enterprise Java server by using Rico.

January 9, 2019

Hendrik Ebbers

#Java

#Docker

#Integration Tests

#Tests

#JavaEE

#JakartaEE

Integration tests with Docker

This post gives an overview how we at Karakun use Docker to create integration tests for JavaEE / JakartaEE based libraries and frameworks.

November 23, 2018

Hendrik Ebbers

#Java

#OpenJDK

Amazon Corretto announced

At the Devoxx conference 2 weeks ago, Amazon announced Corretto as a new player in the OpenJDK market. Next to companies like SAP, Oracle or Bellsoft, the cloud computing company now provides a custom OpenJDK build. On the website Amazon Corretto is described as "No-cost, multiplatform, production-ready distribution of OpenJDK". In this post I will have a deeper look at Corretto and explain why Amazon did this move.

September 25, 2018

Hendrik Ebbers

#Java

Java 11 release event

Together with Oracle and Heise we will do a Java 11 release event. The event will be live streamed and recorded at YouTube. If you are interested in the new features of Java 11 and want to know more information about the new roadmap of OpenJDK and Oracle you should attend our event online.