--- title: JEP 401: Value Objects (Preview) JDK 28 integration description: JEP 401 (Value Objects, Preview) and JEP 539 (Strict Field Initialization in the JVM, Preview) have been integrated into the openjdk/jdk repository as part of... canonical: https://daily.dev/posts/jep-401-value-objects-preview-jdk-28-integration-fu8woteqj twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: JEP 401: Value Objects (Preview) JDK 28 integration | daily.dev og:description: JEP 401 (Value Objects, Preview) and JEP 539 (Strict Field Initialization in the JVM, Preview) have been integrated into the openjdk/jdk repository as part of... og:url: https://daily.dev/posts/jep-401-value-objects-preview-jdk-28-integration-fu8woteqj og:image: https://api.daily.dev/og/posts/FU8WOTEqJ.png og:image:alt: JEP 401: Value Objects (Preview) JDK 28 integration 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. # JEP 401: Value Objects (Preview) JDK 28 integration **[Awesome Java Newsletter](https://daily.dev/sources/java_libhunt)** · 1 min read · 0 upvotes · 0 comments ## Summary JEP 401 (Value Objects, Preview) and JEP 539 (Strict Field Initialization in the JVM, Preview) have been integrated into the openjdk/jdk repository as part of JDK 28. The Valhalla team has completed this integration work, and the repository is now open for large re-work commits without restrictions. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Has JEP 401 Value Objects been integrated into JDK 28? Yes, JEP 401 (Value Objects, Preview) and JEP 539 (Strict Field Initialization in the JVM, Preview) have both been integrated into the openjdk/jdk repository for JDK 28. The integration was completed by the Valhalla team, and the repository is now open for large re-work commits without any further holds. _Java developers tracking Project Valhalla milestones follow JDK integration announcements like this on daily.dev._ ## Similar posts on daily.dev - [8389219: Implement JEP 401: Value Objects \(Preview\) by MrSimms · Pull Request \#31120 · openjdk/jdk](https://daily.dev/posts/8389219-implement-jep-401-value-objects-preview-by-mrsimms-pull-request-31120-openjdk-jdk-hghnkbn5r) · Hacker News · 0 upvotes · 0 comments - [Java’s biggest language change in a decade is finally landing. It took 197,000 lines of code.](https://daily.dev/posts/java-s-biggest-language-change-in-a-decade-is-finally-landing-it-took-197-000-lines-of-code--8eeespmnb) · The Next Web · 39 upvotes · 1 comments - [JEP 401: Value Objects \(Preview\)](https://daily.dev/posts/jep-401-value-objects-preview--1rxfjujqr) · Inside Java · 2 upvotes · 0 comments --- Tags: [#java](https://daily.dev/tags/java), [#jvm](https://daily.dev/tags/jvm) [View this post on daily.dev](https://daily.dev/posts/jep-401-value-objects-preview-jdk-28-integration-fu8woteqj) ```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":"JEP 401: Value Objects (Preview) JDK 28 integration","url":"https://daily.dev/posts/jep-401-value-objects-preview-jdk-28-integration-fu8woteqj","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/jep-401-value-objects-preview-jdk-28-integration-fu8woteqj"},"datePublished":"2026-08-06T20:21:43.704Z","dateModified":"2026-08-10T12:50:15.095Z","description":"JEP 401 (Value Objects, Preview) and JEP 539 (Strict Field Initialization in the JVM, Preview) have been integrated into the openjdk/jdk repository as part of...","image":"https://media.daily.dev/image/upload/s--0_ODbtD2--/f_auto/v1722860399/public/Placeholder%2008","thumbnailUrl":"https://media.daily.dev/image/upload/s--0_ODbtD2--/f_auto/v1722860399/public/Placeholder%2008","isAccessibleForFree":true,"articleSection":"Awesome Java Newsletter","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":"Awesome Java Newsletter","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/7729929f2ca649d7b13f6b04aa94d300","url":"https://daily.dev/sources/java_libhunt"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/jep-401-value-objects-preview-jdk-28-integration-fu8woteqj","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"java,jvm","timeRequired":"PT1M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Awesome Java Newsletter","item":"https://daily.dev/sources/java_libhunt"},{"@type":"ListItem","position":3,"name":"JEP 401: Value Objects (Preview) JDK 28 integration"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/jep-401-value-objects-preview-jdk-28-integration-fu8woteqj#faq","mainEntity":[{"@type":"Question","name":"Has JEP 401 Value Objects been integrated into JDK 28?","acceptedAnswer":{"@type":"Answer","text":"Yes, JEP 401 (Value Objects, Preview) and JEP 539 (Strict Field Initialization in the JVM, Preview) have both been integrated into the openjdk/jdk repository for JDK 28. 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