Project Valhalla value classes head for JDK 28 after massive code integration
Oracle confirmed that JEP 401 – value classes and objects – will land in OpenJDK's main line for JDK 28, bringing a massive 197k‑line pull request. The feature is still a preview and disabled by default, but its inclusion signals the long‑awaited culmination of a decade of work on Project Valhalla.