1. Spring and Java>> Are Harnesses Worth the Cost? [martinfowler.com]Coding agents with and without a behavioral harness. An interesting experiment, where the harness makes a smaller model more reliable, but adds cost without improving a stronger model’s results.>> Java – The Year of the Runtime! [inside.java]Why Java’s runtime matters as AI agents take on more coding.Also worth reading:>> JDK 28 [openjdk.org]>> One Embedding per Job, or Two? Measuring Semantic Search in a Spring Boot Job Portal [foojay.io]>> Your agents don’t need an LLM to negotiate [foojay.io]>> Testing Jakarta EE: Three Layers, Three Tools [foojay.io]>> We Didn’t Want to Build Another Java Server [foojay.io]>> Introducing Jenesis: You Already Wrote the Build Script [foojay.io]>> New Lower SMB Pricing and Easier Online Purchasing of Java SE Universal Subscription [oracle.com]>> Scraping websites and bot-protection [frankel.ch]>> Improving the Harness [code-cop.org]>> Keep WordPress If You’re Looking for Trouble… Or Read This! [foojay.io]>> The Craft of Practitioner Voice [martinfowler.com]>> Reliable GPU compute for large training & inference jobs [netflixtechblog.com]Webinars and presentations:>> How Does Java Fit Into the World of AI—and How Can It Become an Even Better Fit? [inside.java]>> Everyday JSON in Java [inside.java]>> Structured Concurrency Looms [inside.java]>> KotlinConf Recap: Lessons from Verifone’s Architect on Kotlin in Mission-Critical Payments [jetbrains.com]>> Quarkus Insights # 263: Everything You Didn’t Want to Know About Quarkus Build Reproducibility [quarkus.io]>> A Bootiful Podcast: legendary Java developer Kohsuke Kawaguchi [spring.io]Time to upgrade:>> Hibernate Validator 9.2.0.Beta1 is out [in.relation.to]>> Oracle Java Platform Extension for Visual Studio Code – Version 27.0.0 Is Now Available [inside.java]>> Micronaut Core 4.10.31 and 3.10.15 [github.com/micronaut-projects]>> Apache Camel 4.23.0 [github.com/apache]>> Payara 7.2026.10 and What’s New In The October 2026 Azul Payara Release? [github.com/payara] [foojay.io]2. Pick of the Week>> How to Write an Effective Software Design Document [refactoringenglish.com]The post Java Weekly, Issue 668 first appeared on Baeldung.