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Java, Spring and Web Development tutorials

Java Weekly, Issue 665
2026-09-27 13:04 UTC by baeldung

1. Spring and Java

>> Just-In-Time Compilation for Java Performance: Recent and Ongoing Improvements [inside.java]

The JVM’s JIT compilers keep adapting – a quick survey of recent performance improvements and the work underway around Valhalla, Leyden, and Panama.

A very useful look at where Java’s runtime speed comes from and where its compilers are headed.

>> Spring AI and TypeSafe Jev: Fast, Cheap, Structured Decisions [spring.io]

Sometimes an AI application needs a decision, not more text. Jev is for that (when it opens up agian).

Also worth reading:

• >> Quality Outreach Heads-up – JDK 28: Rich JavaDoc Notes [inside.java]
• >> JEP targeted to JDK 28: 401: Value Objects (Preview) [inside.java]
• >> The quarkus.io site is now built with Quarkus Roq [quarkus.io]
• >> MCP goes stateless, and Quarkus already implements it [quarkus.io]
• >> Releasing Spring for Modern Challenges [spring.io]
• >> Leave the Class Path in the Rearview Mirror [netflixtechblog.com]
• >> Mirroring the JUnit repository to Codeberg [marcphilipp.de]

Webinars and presentations:

• >> Episode 70 “AOT Caching – Netflix’ Practice vs OpenJDK’s Theory” [I/O] [inside.java]
• >> Quarkus Insights #260: CLI and TUI Applications — A Terminal Renaissance in Java [quarkus.io]
• >> Spring Office Hours Podcast: S5E24 – Jev, Java and Spring [spring.io]
• >> A Bootiful Podcast: Spring Tools lead Martin Lippert [spring.io]

Time to upgrade:

• >> BoxLang 1.17.0 Released: Module Inception, CLI Checker, Jar Loading and much more! [foojay.io]
• >> Hibernate 8.0.0.Beta2 [in.relation.to]
• >> Helidon 27 Released [inside.java]
• >> Quarkus 3.39.5, 3.33.4, 3.33.3.3, and 3.27.5.3 [quarkus.io / github.com/quarkusio]
• >> What’s New in the September 2026 Azul Payara Release? [azul.com]
• >> Ktor 3.6.0 Is Now Available! [jetbrains.com]
• >> GraalVM Community 25 Innovation 4 (graal 25.4.4.1.1, jdk 25.0.4.1.1) [github.com/graalvm]
• >> JHipster 9.4.0 [github.com/jhipster]
• >> Vert.x 5.2.0 [github.com/eclipse-vertx]
• >> Elasticsearch 8.19.22 [github.com/elastic]
• >> Zuul 4.1.9, 4.1.8, and 4.1.5 [github.com/Netflix]
• >> Grails 7.2.4, 7.1.7, and 7.0.17 [github.com/apache]
• >> Micronaut Core 5.2.5, 5.2.4, 4.10.29, and 5.2.3 [github.com/micronaut-projects]

2. Technical & Musings

>> Diagrams as Code: Mermaid Support on the new Foojay [foojay.io]

Foojay now renders Mermaid diagrams directly from fenced code blocks. Frank Delporte walks through sequence, class, state, ER, and Gantt examples, then covers theme-aware rendering, syntax checks, and accessibility. A practical way to keep diagrams for Java APIs and workflows in the same reviewable source as the article.

Also worth reading:

• >> AI-assisted genealogy, a follow-up [frankel.ch]
• >> AsciiDoc Support on the new Foojay [foojay.io]
• >> Measuring the Sun’s oscillations with an amateur spectroheliograph [melix.github.io]
• >> I don’t like LLMs [martinfowler.com]
• >> Building the business case for agentic software development [scottlogic.com]
• >> Responsible Quality Engineering [satisfice.com]
• >> Introducing WildFly Themes — Community-Driven Planning for WildFly [wildfly.org]

3. Pick of the Week

>> Build your Agentic Harness is Out

The post Java Weekly, Issue 665 first appeared on Baeldung.

       

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