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Technology3h 33m ago
Java Enhancement Proposal 401 (JEP 401), which brings value classes to the language, will be integrated into the OpenJDK mainline early next month targeting JDK 28.
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Who
Oracle software engineer Lois Foltan, Oracle’s Java Language Architect Brian Goetz
What
Java Enhancement Proposal 401 (JEP 401), which brings value classes to the language, will be integrated into the OpenJDK mainline early next month targeting JDK 28.
When
Mon, 15 Jun 2026 18:01:00 GMT · 3h 33m ago
Where
not specified ·
Why
JEP 401 addresses a fundamental limitation in Java where every object has a unique identity in memory, even if data is identical, leading to 'unwanted complexity' and performance issues.
The Frontline Impact
How this affects you
This major language change, part of Project Valhalla, will allow Java to create objects without unique memory identities, significantly improving memory overhead and cache locality, especially for data types like coordinates or currency amounts. While a milestone for millions of Java developers, it's just the first step in a larger, long-term effort that will also introduce deliberate breaking changes.
Story chain
3 events in this thread- Technology3h 33m agoJava Enhancement Proposal 401 (JEP 401), which introduces value classes and objects, will be integrated into the OpenJDK mainline early next month targeting JDK 28.Open article
- Technology3h 33m agoJava Enhancement Proposal 401, introducing value classes and objects, will be integrated into the OpenJDK mainline early next month targeting JDK 28.Open article
- Currently Reading3h 33m agoJava Enhancement Proposal 401 (JEP 401), which brings value classes to the language, will be integrated into the OpenJDK mainline early next month targeting JDK 28.