Red Hat build of OpenJDK

Our first DevNation Live regional event was held in Bengaluru, India in July. This free technology event focused on open source innovations, with sessions presented by elite Red Hat technologists. Quarkus is revolutionizing the way that we develop Java applications for the cloud-native era, and this tutorial, presented by Edson Yanaga , explains why. Yanaga looks at how Quarkus works and the techniques it uses to achieve its dramatic startup speed improvements. He also covers the Quarkus extension API, so...

We show how to create an Enterprise JavaBeans timer programmatically and with easier annotation.

Watch this live coding session to learn more about Quarkus and see to make your APIs start in a matter of milliseconds and consume tiny amounts of memory.

In this video, Burr Sutter discusses the key microservices architecture principles and explains how and why to evolve to this approach.

We look at what to expect from Jakarta EE 8 -- the latest iteration of Java EE.

The Java platform has become one of the most widely used platforms, with a huge ecosystem in the world of technology. Java lets developers create applications for several platforms, such as Windows, Linux, embedded systems, and mobile. Java also has received criticisms, such as: Java is fat; Java takes a lot of memory; Java is verbose. But, Java was created to solve big problems, not small problems. Of course, you can also solve small problems with Java, but you see...

An emoji is a Unicode character with a value larger than a Java char can handle. This article shows you how emojis work in Java.

A DevNation Live session - Revisiting Effective Java in 2019

Born of the browser wars of the 1990s, JavaScript has gone from a simple scripting language to be the most important ecosystem of the development world.

A DevNation Live session - Introducing Kogito

This article explains how the use of lightweight threads, supported by Project Loom, can help you write scalable code in Java.

Thorntail is the new name for WildFly Swarm and bundles everything you need to develop and run Thorntail and MicroProfile applications. Learn more.

In this article, I’ll show performance comparisons for building and running a Java application before and after using Quarkus.

This article describes some of the problems that may be encountered when migrating a Java application to Quarkus and how to resolve them.

Installing OpenJDK on Windows and Linux

Updating Drools, the world's most popular open source rule engine, to make it part of the cloud and serverless revolution.

What you need to know to migrate from Oracle JDK to OpenJDK on RHEL, the impact to developers and ops teams, and solutions to potential challenges.

Serverless architectures can benefit from faster startup times. The configuration demonstrated in this article shows how GraalVM can reduce startup time and Docker image size for Java-based programs hosted on container platforms such as Red Hat OpenShift Containter Platform.

A DevNation Live session - MicroProfile - Microservices with Java EE

We will show you how a reactive toolkit for Java known as Eclipse Vert.x can fundamentally change the way you build applications

Article

I was lucky enough to speak at JavaOne 2017 last month. It was my first time there, as both an attendee and a speaker. I must say I was very much impressed. In particular, during the keynotes, I was happy to see how Java is moving forward, keeping up with the fast innovation pace in the cloud area. Unleash Your Talents: Server-Side Kotlin for Mobile Developers My presentation was about using the Kotlin language on the server-side with Eclipse Vert.x...

Besides testing, Java code coverage can be a very effective debugging tool as it helps you see which code is ran. EclEmma is a great Java code coverage tool that has an Eclipse plugin. It's very simple and intuitive and has all you would expect from a code coverage tool. With it, you can: See code coverage for a java application that you've run (and potentially merge multiple run instances) See code coverage for jUnit tests and maven tests See...

Let’s be honest: it’s pretty exciting that Infinispan now supports Java 8 for many reasons, but perhaps one of the most anticipated reasons is because of the new stream classes.

What can be done to help the OpenJDK JVM play well in the world of Linux Containers? I thought I'd start tackling this issue by answering some frequently asked questions: Why is it when I specify -Xmx=1g my JVM uses up more memory than 1gb of memory? Specifying -Xmx=1g is telling the JVM to allocate a 1gb heap. It's not telling the JVM to limit its entire memory usage to 1gb. There are card tables, code caches, and all sorts...

Web developers and IT professionals are the foundations of any quality business’ data security. However, with technology constantly changing and evolving as well as becoming more consumer-friendly, this data’s vulnerability only increases and it can often be hard to even notice how this new technology can actually affect your company until it occurs. Despite this, ignorance to modern hacking techniques does not refute their inability to transform even the smallest of devices into a weapon with which to infect or...

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