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Java Articles by Foojay.io

September, 2026

  • 20 September

    World geography gotchas

    Author: Nicolas Frankel Original post on Foojay: Read More Years ago, a colleague of mine told me about two pockets of foreign land surrounded by Switzerland: Campione d’Italia and Büsingen am Hochrhein,…

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  • 17 September

    BoxLang 1.17.0 Released: Module Inception, CLI Checker, Jar Loading and much more!

    Author: Cristobal Escobar Original post on Foojay: Read More BoxLang has always been an extensible language. As of 1.17.0, it is a hierarchically extensible one. Modules can now contain other modules; aka Module…

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  • 16 September

    What’s New In The September 2026 Azul Payara Release?

    Author: Dominika Tasarz Original post on Foojay: Read More MicroProfile 7.1 lands on the commercial lines, OpenTracing is removed, and Jakarta Agentic AI reaches Payara Micro in the September Azul Payara release.

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  • 15 September

    Can You Explain the Diff Your AI Agent Just Wrote?

    Author: Viktoria Evdokimova Original post on Foojay: Read More Every Java developer has been in a code review where the question is simple: What does this method do? The answer used to tell you something.

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  • 15 September

    How I Built an AI Assistant for My Career with Java, Spring AI, and MongoDB

    Author: Ricardo Mello Original post on Foojay: Read More How one developer built a personal AI assistant in Java using Spring AI, MongoDB Vector Search, conversation memory, and tool calling with Calendly.

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  • 9 September

    Masking a JVM thread dump without breaking the analysis

    Author: Felipe Maschio Original post on Foojay: Read More A few weeks ago I posted on r/java about detecting virtual thread pinning from a plain thread dump. The technical discussion was fine. The comment that stuck with me had nothing to do with pinning: “the problem isn’t taking the dump, it’s that uploading a production dump to a third-party site …

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  • 8 September

    Debugging Is Invariant Discovery: What One Kafka Session Taught Us About AI Agents

    Author: Viktoria Evdokimova Original post on Foojay: Read More #foojay-site-content for WordPress credentials (already have them from the first post). 2. foojay.io/wp-admin -> new post, paste this Markdown, Save Draft, Preview in a new tab. 3. Code blocks: “Convert to blocks” / “Code Insert”, set language Java for the two Java snippets. 4. Featured image: required. Use articles/explyt-kafka-tid-invariant/en/cover-one-symptom-ten-problems.png (1672×941, branded, …

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  • 8 September

    Community Spotlight: BoxLang Express Brings Node-Style HTTP to the JVM

    Author: Cristobal Escobar Original post on Foojay: Read More If you’ve spent years in Spring Boot, Micronaut, or Jakarta EE, “web framework” usually means a servlet container, an embedded Tomcat or Netty, a build step, and a fat jar before anything answers a request. What if you could skip all of that and still be on the JVM? BoxLang Express, …

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  • 8 September

    “Commit created” — but it isn’t: why the agent’s word needs external verification, and what the mistake costs

    Author: Viktoria Evdokimova Original post on Foojay: Read More A detailed report reads like proof. The agent lists the files it touched, names the branch, quotes a commit hash, adds a test count and closes with “done”. The work has a shape. The shape looks right. You have six more tickets. The report is model output. The commit, if it …

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  • 8 September

    From OpenTelemetry to DuckDB

    Author: Geertjan Wielenga Original post on Foojay: Read More Observability platforms generally expect you to do your analysis inside them, using their query language and their dashboards. That works for the questions you already know you have. It works less well for the ad-hoc ones: a quick percentile, a pivot by status code, or “which service is actually eating the …

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