Friends of OpenJDK Today

Table of Contents A Critical Security Fix, Patched Across Every BranchAzul Payara 7.1.0: Supported Payara 7, Post-GABug FixesImprovementsImprovementsComponent UpgradesAzul Payara Community 7.2026.6Behaviour Change to Note: Server “Ready” Signal TimingAzul Payara 6.39.0: Jakarta EE 10, ContinuedComponent UpgradesAzul Payara 5.88.0: Jakarta EE …

Table of Contents The Problem with Three Return TypesWhat Is a Query Transformer?The Transformer ContractLive Examples: Inline Closures1. Envelope with Metadata2. Domain Object Hydration3. Tabular Format (Near Zero-Copy)4. Rich Column DescriptorsReusable Class TransformersRegistered App-Level TransformersTransformer Resolution Orderbx:query Component SupportJDBC Metadata: …

Table of Contents The floating-point problemIEEE 754Naive equality checksstrictfp, the x87 FPU, and Java 17’s silent fixThe NaN and -0.0 landminesWhen double is the right choiceReducing floating-point errorsKahan Compensated SummationNeumaier’s improved Kahan-Babuška algorithmPairwise summationFused multiply-addWhat BigDecimal actually solvesConstructing BigDecimal from …

Table of Contents From Vibe to SystematicHow a Coding Agent Actually WorksThe WorkflowTime Changes When You Use AIDone ≠ ReadyWhat Companies Need to Enable ThisOn the Eclipse SideFinal ThoughtsThis Post Was Co-Authored With Claude CodeMost developers using AI tools are …

Table of Contents And why MongoDB might be a better relational database than you ever realized.The video streaming service use case: profiles, devices, and device typesUnderstanding the query aggregation pipelineThe pipeline performance problemAnd why MongoDB might be a better relational …

Table of Contents What is Quarkus?How does Quarkus compare to Spring, Micronaut, or other frameworks?Is Quarkus more modern because it is newer?Does Quarkus replace the JVM?What is Quarkus live reload?How does build-time optimization work?How does this differ from JIT and …

Table of Contents Why Combine Quarkus and Pi4J?What Does the Extension Provide?A Simple ExampleConfiguration Without RecompilationGPIO Injection by Number or NameHealth Checks for Raspberry Pi ApplicationsBuilding Modern IoT ApplicationsPart of the Quarkiverse EcosystemLooking AheadConclusionJava developers building applications for Raspberry Pi …

Table of Contents YouTubePodcast AppsGuestsLinksContentYour AI-powered Java application is live in production. But have you actually tested whether it can be jailbroken or manipulated into leaking data it should never reveal? In this episode, Iryna Dohndorf walks us through Tiberius, …

A maintainer recently hid a destructive prompt-injection payload aimed at AI agents inside his own framework. That is a betrayal of the trust open source runs on. Here is where we stand, and why I think AI is the biggest opportunity small OSS players have ever had.

This week brings native Windows executables with no JVM, a portable 3D graphics API, a gaming API with Box2D physics, cross-platform printing, and Apple Wallet support, in what is probably our biggest update ever.

Where does production policy belong in a managed runtime? The thesis behind Eliya, an opinionated OpenJDK 25 distribution, and the one flag it ships. Part 1.

Table of Contents What Are Paketo Build Packs?Spring Boot Already Uses PaketoSetting Up the Demo ProjectConfiguring the Azul Zulu BuildpackChoosing the Java Version and TypeUsing jlink to Generate a Custom JREEnabling Observability and Debugging FeaturesComplete Configuration ReferenceUsing Paketo Without Spring …