--- title: "JEP 526 - Stable Values Become Lazy Constants" url: https://daily.dev/posts/jep-526---stable-values-become-lazy-constants-8o5dxtmjs source_url: https://softwaremill.com/jep-526-stable-values-become-lazy-constants/ type: article source: "SoftwareMill" published: 2026-03-16T15:47:04.251Z updated: 2026-08-24T08:11:27.262Z tags: ["java", "jvm"] reading_time: 5 upvotes: 0 comments: 0 language: 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 526 - Stable Values Become Lazy Constants **[SoftwareMill](https://daily.dev/sources/softwaremill)** · 5 min read · 0 upvotes · 0 comments ## Summary JEP 526 renames Java's Stable Values feature to Lazy Constants, introducing the LazyConstant container as a preview feature in Java 26. A LazyConstant holds a single value that becomes immutable once set, enabling lazy initialization without sacrificing JVM optimizations like constant folding. Key changes from Java 25 include: removal of the empty of() constructor (a supplier must now be provided), consolidation of multiple setter methods into a single orElse method, removal of Stable Functions, and migration of stable collections to List.ofLazy() and Map.ofLazy() factory methods. Potential pitfalls include lack of Serializable support and the need to manually declare the LazyConstant field as final to prevent reassignment. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [JEP 526 Simplifies Deferred Initialization Ahead of JDK 26](https://daily.dev/posts/jep-526-simplifies-deferred-initialization-ahead-of-jdk-26-gpocqrfgk) · InfoQ · 0 upvotes · 0 comments - [JEP 502 - Stable Values. New Feature of Java 25 Explained](https://daily.dev/posts/jep-502---stable-values-new-feature-of-java-25-explained-zgt8mp7sr) · SoftwareMill · 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-526---stable-values-become-lazy-constants-8o5dxtmjs)