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- **Read more:** [GDPR Article 6: The Web Scraping Checklist Devs Ignore at Their Peril](https://devtoolsfeed.com/article/gdpr-article-6-the-web-scraping-checklist-devs-ignore-at-their-peril/) - **Read more:** [Category Theory's Types Fix Set Theory's Fatal Flaw](https://devtoolsfeed.com/article/category-theorys-types-fix-set-theorys-fatal-flaw/) Frequently Asked Questions **What are Java 26 Lazy Constants?** LazyConstant from JEP 526: thread-safe, one-time lazy init container. Replaces DCL singletons. **Does LazyConstant replace the singleton pattern?** For lazy, shared instances? Yes. Thread-safe, no boilerplate. Eager? Stick to finals. **Is JEP 526 stable in Java 26?** Second preview. Enable with --enable-preview. Final soon — direction solid.

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Java 26's Lazy Constants: The Thread-Safe Singleton Killer We've Waited For

Ever stared at double-checked locking and wondered if Java devs secretly hate themselves? JEP 526's LazyConstant says: no more.

DevTools Feed Apr 03, 2026 3 min read 14 views

Java 26 LazyConstant code example replacing double-checked locking

⚡ Key Takeaways

LazyConstant kills double-checked locking with native, simple API. 𝕏
Thread-safe lazy init for expensive objects like HTTP clients. 𝕏
Preview feature: use --enable-preview; not Serializable yet. 𝕏

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