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Technology4h 49m ago

Java Enhancement Proposal 401 (JEP 401), which introduces value classes and objects, will be integrated into the OpenJDK mainline early next month targeting JDK 28.

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Who
Oracle software engineer Lois Foltan, Brian Goetz
What
Java Enhancement Proposal 401 (JEP 401), which introduces value classes and objects, will be integrated into the OpenJDK mainline early next month targeting JDK 28.
When
Mon, 15 Jun 2026 18:01:00 GMT · 4h 49m ago
Where
not specified ·
Why
JEP 401 addresses a fundamental aspect of Java by removing object identity from many types to improve performance, memory overhead, and cache locality.
The Frontline Impact

How this affects you

This change, developed over 12 years, is expected to significantly improve Java's performance and efficiency for the millions of developers using the language. While initially a preview feature, it lays the groundwork for more advanced optimizations and could bring substantial shifts in how Java applications are designed and run in the future.

Story chain

3 events in this thread
  1. Currently Reading4h 49m ago
    Java Enhancement Proposal 401 (JEP 401), which introduces value classes and objects, will be integrated into the OpenJDK mainline early next month targeting JDK 28.
  2. Technology4h 49m ago
    Java Enhancement Proposal 401, introducing value classes and objects, will be integrated into the OpenJDK mainline early next month targeting JDK 28.
    Open article
  3. Technology4h 49m 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.
    Open article

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