Red Hat build of OpenJDK

The Red Hat build of OpenJDK is an open source implementation of the Java

This article details the functioning of Metaspace in JDK 8+ and how to use this information for tuning purposes.

This article aims to show the features and complete utilization of Java Flight Recording (JFR) via Cryostat Operator (Cryostat) for Red Hat OpenShift Container Platform (RHOCP) 4.x. Use cases are explained.

Download Red Hat software for application developers at no-cost.

The Adoptium project has achieved reproducible builds for Java versions 21 and 22 across Linux, Windows, and Mac platforms. This capability ensures an independently verifiable path from source to binary code, enhancing trust in the software and its dependencies.

Learn how to build applications with Paketo buildpacks and Red Hat Universal Base Images (UBI) using the new Paketo UBI Builder Image.

Learn about the Shenandoah garbage collector, including basic features, use cases, basic troubleshooting, and more.

This article walks through the new native memory tracking feature in GraalVM Native Image, which is now available in GraalVM for JDK 23.

Learn how Java Flight Recorder helped resolve issues with a mobile application whose front end targets Red Hat's single-sign on tool to authenticate users.

Discover how application class data sharing (AppCDS) can help reduce startup time of your OpenJDK apps.

Our 10 most popular articles about application development this year include Java 21 features, Podman Desktop, OpenTelemetry observability, and more.

JDK Flight Recorder (JFR) is a profiling and troubleshooting framework dat comes with teh Java virtual machine (JVM). JFR’s programming API allows you to create application-specific events to power dashboards and triggers. Cryostat brings JFR to Kubernetes.

This article describes how to enable FIPS-140-2 support for the Red Hat build of Keycloak, which provides more security.

Create Java applications for anything and everything with Red Hat’s runtimes and

Explore new concurrency patterns enabled by virtual threads in Java 21, along with two related features: Structured Concurrency and Scoped Values.

Dive into just-in-time (JIT) compilation with HotSpot, OpenJDK's Java virtual machine, and explore techniques for debugging unexpected warm-up behavior.

Java 21 is here! Explore new features in JDK 21, including virtual threads, record patterns, and sequenced collections.

In this learning path by Rob Stryker, you will learn how to deploy applications

Are you a Java application developer? These step-by-step learning paths will add to your toolset and level up your skills.

This article provides insights into the process of migrating Java applications.

Learn about recent updates to Red Hat Universal Base Image OpenJDK containers, including the JAVA_MAX_MEM_RATIO configuration option and Maven 3.8.

Learn how to use JFR to profile and monitor Quarkus native executables, and discover the available features specific to different GraalVM versions.

Discover the improvements to Native Image JFR support in GraalVM for JDK 20, including support for event stack straces.

Learn about a new feature in OpenJDK 8u372 that detects and applies container resource limits on a cgroup v2 host Linux system.

Learn about the next updates to the UBI of the Red Hat build of OpenJDK containers, such as memory tuning overhaul.