--- title: Inside Java Newscast #89 // nipafx | daily.dev description: Highlights from JavaOne 2025 covering several OpenJDK topics: why unit tests make poor AOT training runs in JDK 24 (they pollute the class cache with... canonical: https://daily.dev/posts/inside-java-newscast-89-nipafx-cvn0cvnca twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Inside Java Newscast #89 // nipafx | daily.dev og:description: Highlights from JavaOne 2025 covering several OpenJDK topics: why unit tests make poor AOT training runs in JDK 24 (they pollute the class cache with... og:url: https://daily.dev/posts/inside-java-newscast-89-nipafx-cvn0cvnca og:image: https://api.daily.dev/og/posts/Cvn0cVnCA.png og:image:alt: Inside Java Newscast #89 // nipafx og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Inside Java Newscast #89 // nipafx **[nipafx \(Nicolai Parlog\)](https://daily.dev/sources/nipafx)** · 12 min read · 0 upvotes · 0 comments ## Summary Highlights from JavaOne 2025 covering several OpenJDK topics: why unit tests make poor AOT training runs in JDK 24 (they pollute the class cache with unnecessary classes), a primer and comparison of OpenJDK's five garbage collectors (Serial, Parallel, G1, ZGC, Shenandoah) with throughput/latency/footprint trade-offs, tips for analyzing Maven build performance using extensions and plugins, the upcoming plan to make `final` truly final in Java (with a JVM flag available today), an advanced RAG pipeline built with LangChain4j featuring query routing, rewriting, and re-ranking, and Project Valhalla's roadmap starting with JEP 401 (value classes) followed by null-restricted types. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [foojay – a place for friends of OpenJDK](https://daily.dev/posts/foojay-a-place-for-friends-of-openjdk-ntwjcfohl) · Foojay.io · 2 upvotes · 0 comments - [Java Weekly, Issue 665](https://daily.dev/posts/java-weekly-issue-665-iivorpdrj) · Baeldung · 0 upvotes · 0 comments --- Tags: [#java](https://daily.dev/tags/java), [#rag](https://daily.dev/tags/rag) [View this post on daily.dev](https://daily.dev/posts/inside-java-newscast-89-nipafx-cvn0cvnca) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Inside Java Newscast #89 // nipafx","url":"https://daily.dev/posts/inside-java-newscast-89-nipafx-cvn0cvnca","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/inside-java-newscast-89-nipafx-cvn0cvnca"},"datePublished":"2026-03-16T08:13:47.299Z","dateModified":"2026-03-16T08:22:28.518Z","description":"Highlights from JavaOne 2025 covering several OpenJDK topics: why unit tests make poor AOT training runs in JDK 24 (they pollute the class cache with...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/81ee09fd2b87fb72204b4f0b2a3d49e4?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/81ee09fd2b87fb72204b4f0b2a3d49e4?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"nipafx (Nicolai Parlog)","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"nipafx (Nicolai Parlog)","logo":"https://media.daily.dev/image/upload/s--H_Echo_u--/f_auto,q_auto/v1773648772/logos/nipafx?_a=BAMAMiiu0","url":"https://daily.dev/sources/nipafx"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/inside-java-newscast-89-nipafx-cvn0cvnca","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"java,rag","timeRequired":"PT12M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"nipafx (Nicolai Parlog)","item":"https://daily.dev/sources/nipafx"},{"@type":"ListItem","position":3,"name":"Inside Java Newscast #89 // nipafx"}]} ```