JEP 401: Value Objects (Preview) merged to OpenJDK master | Hacker News

OpenJDK has merged JEP 401 into master, bringing Java value objects in as a preview feature.

Value objects are meant to support identity-free, more efficient data structures in Java.

The change is a key step in Java’s future language and performance model, especially for immutable data design.

The post also contrasts Java’s progress with JavaScript, whose records and tuples proposal has been withdrawn.