Table of Contents JEP OverviewNew featuresCore LibsHotSpotSecurity LibsJava Flight RecorderRepreviews and FinalizationsJEP 505: Structured Concurrency (Fifth Preview)JEP 506: Scoped ValuesJEP 507: Primitive Types in Patterns, instanceof, and switch (Third Preview)JEP 508: Vector … | Continue reading
Decades ago, I contributed to a very interesting project called SunSPOT at SUN Microsystems. It was a small device with wireless connectivity, built-in sensors, running on Java (compatible with runtime 1.6), and powered by battery. It enabled the design of ... The post Research: … | Continue reading
Table of Contents VideoPodcast (Audio Only)GuestsContent We're excited to present the first episode of the Foojay Podcast's fifth season, marking the release of OpenJDK 25! For the first time, an OpenJDK release is aligned with the year, and we can ... The post Foojay Podcast #78 … | Continue reading
Table of Contents Why MongoDB and Java are such good friendsThe missing schema of loosely typed systems Bringing schema back Example: Spring Boot sea temperature service Sea temperatures Weather reports Schemas Tip—BSON IDs and the _id field Traps—record definitions for POJO code … | Continue reading
The launch of ChatGPT in November 2022 has influenced and perhaps even changed the rules of the game in many areas. Although I personally focus on the IT industry, observations suggest that it is affecting the entire industry, including the ... The post Stochastic AI Agility: Bre … | Continue reading
Table of Contents Benchmarking Kotlin performance on Azul Platform Prime What’s next for JetBrains and Azul? JetBrains and Azul are collaborating on a shared vision of running Kotlin-generated bytecode on a high-performance Java platform to find new ways to enhance runtime perfo … | Continue reading
Table of Contents How can Spring help?PrerequisitesCreating our appConnecting our databaseOur Book modelBook repositoryOur REST controllerCreateReadUpdateDeleteAdding DTOs and validationBookRequestBookResponseUpdating the controllerTesting the APIRun the APICreateReadUpdateDelete … | Continue reading
Table of Contents The Problem with Code-Centric DevelopmentRequirements as the Single Source of TruthThe Complete WorkflowEverything is Code, Everything is VersionedAI as the Consistency EngineThe Structure: Independent EpicsA Real Example: System Use Case SpecificationThe Result … | Continue reading
Table of Contents Why Use $group for Organizing Recipes?Setting Up the DataUsing $group to Organize Recipes by TypeStep 1: Grouping Recipes by TypeStep 2: Including Recipe Details in Each GroupGrouping Recipes by TagsStep 1: Using $unwind to Break Down TagsAdvanced ... The post M … | Continue reading
Table of Contents The talks Home Lab - Private Cloud on a budget Loom is more than virtual threads: Structured Concurrency and Scoped Values 15 Productivity tips to accelerate your Apache Maven builds Take the Polar Plunge: A Fearless Introduction ... The post KCDC 2025 appeared … | Continue reading
Table of Contents Previous: 14 days have passed and it's time for a new batch of readings that could shape developments in the field of artificial intelligence. The current newsletter vol. 4 offers us a closer look at several different ... The post JC-AI Newsletter #4 appeared fi … | Continue reading
Table of Contents Why Queryable Encryption?A quick look at Spring Data MongoDBUse case: HR system with encrypted fieldsSetting up the projectConfiguring dependencies and propertiesAdding mongodb-cryptApplication.yml configurationAccessing properties in the codeBuilding the applic … | Continue reading
Table of Contents 📅 Event Details🔎 A Program for Every Developer🎤 Meet the Speakers & Sessions🌟 Why This Year is Special🔗 Join Us 🚀 The AI4Devs Amsterdam 2025 Schedule is Live! The wait is over—AI4Devs Amsterdam has just published i … | Continue reading
Table of Contents CoreApplicationsGamesComponents, Libraries, ToolsPodcasts, Videos, BooksTutorialsMiscellaneousJFX Central Here are the links shared on jfx-central.com in the August summary. Did we miss anything? Is there anything you want to have included in one of the next ove … | Continue reading
Table of Contents Why is Latency so Important to Kafka?Introduction of AutoMQIntroducing Azul Zing Builds of OpenJDKPerformance Test & ExplanationTest Environment ConfigurationLatency: Taming the TailCPU Utilization: Do More with LessFuture Outlook Why is Latency so Important to … | Continue reading
Table of Contents What is a multidimensional array in Java?Declaring a multidimensional arrayMixing Bracket PositionsCreating a multidimensional arrayDefault values in arraysUnderstanding jagged arraysUnderstanding JVM bytecodes for array creationBytecode for arrays of primitives … | Continue reading
In distributed systems, high availability is not a luxury—it's a necessity. And one of the very important parts of that is automatic failovers. What are automatic failovers and how do they work? Let's see today! These concepts are actually similar ... The post What happens when a … | Continue reading
Table of Contents What are GitHub workflows?GitHub ActionsChoosing the right ActionKnow your ActionsPin your dependency versionUse the job summaryUnderstand workflows' lifecycleTest locallySummary I've quite a lengthy experience with GitHub workflows, but not up to the point wher … | Continue reading
Table of Contents git pushgit rebase Git has become a fundamental part of our developers' daily routine that it's hard to remember our lives without it. And yet, most of us use a limited set of commands and options. Today, ... The post Git default options appeared first on foojay … | Continue reading
Let's be real – keeping up with the pace of software development today is intense. New frameworks pop up and the push for faster, better, and more secure code never stops. This article is all about cutting through the buzz and looking ... The post AI Gives Time, Not Confidence: D … | Continue reading
Table of Contents What is Liquibase?What is MongoDB?Setting up a local MongoDB instance on WindowsUse Liquibase with MongoDBPrerequisitesInstall supporting driversConnection configurationConnection testHands-on execution steps detailed1. Create project and add files2. Project str … | Continue reading
The first and second newsletters introduced a 14-day cadence, and even though it is the holiday season for many of us, we are sticking to the promised period. The current newsletter vol.3, brings a collection of valuable articles focusing on ... The post JC-AI Newsletter #3 appea … | Continue reading
Table of Contents GPT-5 is on top at every performance level and every price point… but it’s no speed demonPerformance by task lengthOther observationsImplications for buildersA Note on Reasoning Introducing the Brokk Power Ranking The Brokk Power Ranking is a ... The post New Ja … | Continue reading
Table of Contents The promise of OpenTelemetryGotchasPath or no path?Python loggingMicrometer TracingQuarkusSummary Last week, I described several approaches to OpenTelemetry on the JVM, their requirements, and their different results. This week, I want to highlight several gotch … | Continue reading
Table of Contents CommonalitiesRunning the OpenTelemetry AgentMicrometer Tracing on Spring BootOpenTelemetry Spring Boot StarterQuarkusDiscussion You may know I'm a big fan of OpenTelemetry. I recently finished developing a master class for the YOW! conference at the end of the y … | Continue reading
Table of Contents Understanding the “Airport” domainModeling the core Airport domain in JavaIdentifying aggregates and entitiesImplementing entities and value objectsBounded contexts and modularizationRepositories, domain services, and factoriesRepositoriesDomain servicesFactorie … | Continue reading
Table of Contents What Are Resource Policies?Why Use Them?Available CapabilitiesApplying Resource Policies with Terraform🔐 Example 1: Allow clusters only on AWS🌐 Example 2: Block public IPs (0.0.0.0/0)🔒 Example 3: Enforce TLS 1.2 or higherValidation and Te … | Continue reading
Table of Contents I remember the first time I saw a diagram of a neuron (Img.1.). I was a school kid, and among other hobbies, I was interested in the human brain, it fascinated me. I borrowed a book from ... The post Do we understand the value of AI knowledge ? appeared first on … | Continue reading
Table of Contents 1. Built-in Resilience Feature2. Fluent JMS Client API3. Robust Api Versioning4. Unified Message Conversion5. Faster and Smarter Testing6. Modern Ecosystem Integration7. Hibernate ORM and JPA Upgrades8. Overhauled HttpHeaders API9. Support for Jackson 3.x10. Nul … | Continue reading
Table of Contents Jakarta EE 11 is a major update in the enterprise Java world. It offers key changes that enhance developer productivity and modernize the platform.Key Features of Jakarta EE 11Jakarta Data: Simplified Data AccessWhat is Jakarta Data?Jakarta Data Code ExamplesUpd … | Continue reading
Table of Contents 0. GitHub Repository1. Add the required dependencies2. Configure the Semantic Cache Vector Store3. Implement the Semantic Caching Service4. Integrate with the RAG ServiceStep 1: Clone the repositoryStep 2: Configure your environmentStep 3: Start the servicesStep … | Continue reading
Table of Contents Java's pattern matchingCharacteristics of the new switch syntaxScala's pattern matchingKotlin's pattern matchingPython's pattern matchingRust's pattern matchingConclusion Pattern matching is a major feature in software development. While pattern matching applies … | Continue reading
Run an Atlas cluster locally in minutes You no longer need a cloud account to try MongoDB Atlas features. Spin up a fully compatible local cluster in seconds, with no login, no credit card, and no friction. 🕒 Reading time: ... The post Run an Atlas Cluster Locally in Minu … | Continue reading
Table of Contents In the first newsletter, we introduced a 14-day cadence, which means that this week it's time for a new collection of articles from the fields of AI, LLM, Java and more.article: OpenAI CEO Sam Altman warns of ... The post JC-AI Newsletter #2 appeared first on fo … | Continue reading
Table of Contents Introduction of DMX UniversesUSB-to-DMX SupportDMX512 Java LibraryDMX512 JavaFX Demo ProjectNext Steps Earlier this month, I released V0.0.1 of my new Java library to interact with DMX512 devices using (optionally) the Open Fixture Library (OFL). After some more … | Continue reading
Monolith vs Microservices in 2025. Discover trends, trade-offs, and why simplicity and DX matter more than ever. The post 🧱 Monolith or 🧩 Microservices in 2025? appeared first on foojay. | Continue reading
After dismissing Java for eight years as a "passing trend for developers who couldn't handle real programming," one developer's 25-year journey reveals how Java evolved from a language he distrusted to the foundation of his career, and why he believes it's still one of the most v … | Continue reading
Table of Contents CoreApplicationsGamesComponents, Libraries, ToolsPodcasts, Videos, BooksConferences, PresentationsTutorialsMiscellaneousJFX Central Here is the overview of the JavaFX LinksOfTheMonth of July 2025. You can find the weekly lists on jfx-central.com. Did we miss any … | Continue reading
Table of Contents ObjectsvolatileLocaleCollatorNormalizer After Java, What's Old? Part I - Collections, let's now have a look at less known old utility classes that can still be useful. Everything in this series will be in Java 8 and later, so ... The post Java, What’s Old? Part … | Continue reading
Table of Contents Understanding LangChain4j GuardrailsSetting Up a Spring Boot Project with LangChain4jImplementing Input GuardrailsContent Safety Input GuardrailSmart Context-Aware GuardrailIntelligent Input SanitizerImplementing Output GuardrailsProfessional Tone Output Guardra … | Continue reading
Table of Contents The setup: A realistic aggregation scenarioThe application behind the testTesting on M0: The hidden riskTaking it to production: Same query, different outcomeReal-time metrics: Detecting the bottleneckQuery insights: The detective toolDon’t guess, let Performanc … | Continue reading
Table of Contents Getting StartedPrerequisitesSetup ProcessCore Features for Java Development1. Code Quality Analysis2. Security Vulnerability Detection3. Performance Optimization Suggestions4. Design Pattern RecognitionWorking with CodeRabbit ReviewsUnderstanding Review Comments … | Continue reading
Table of Contents VideoPodcast (Audio only)Content This is the first Foojay podcast in Spanish. It's also the shortest one and the final of season 4 😉 Jonathan Vila "highjacked" the microphone from Geertjan Wielenga (See episode 76) during the DevBcn ... The post Foojay P … | Continue reading
Table of Contents A Personal StoryAbout DMX512 and OFLWhat is DMX512What is Open Fixture LibraryDMX512 Java LibraryMy Test SetupMinimal Code ExampleUsing Fixtures and ModesDetecting USB-to-DMX and IP-to-DMX interfacesDMX512 JavaFX Demo ProjectNext Steps In this post, I would like … | Continue reading
Table of Contents You're building an AI agent with memory using Spring AI and Redis. Unlike traditional chatbots that forget previous interactions, memory-enabled agents can recall past conversations and facts. It works by storing two types of memory in Redis: ... The post Agent … | Continue reading
Table of Contents Java introduces several new language features in the 22 to 24 versions which collectively simplify code, enhance documentation, and provide powerful tools for bytecode manipulation and advanced stream processing. This article shows you how to leverage these ... … | Continue reading
Table of Contents What are MongoDB ACID transactions and when should you use them?But do you really need a transaction?Transaction APIs: Callback vs coreWhen to use the callback APIWhen to use the core APISetting up: A simple banking examplePrerequisitesConnecting and ... The pos … | Continue reading
Table of Contents There is a lot going on in today's technological world, but the most intense and vibrant area is undoubtedly the field of artificial intelligence. After brainstorming, our Java Champion Education group agreed to create a newsletter with ... The post AI Newslette … | Continue reading