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JVM

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All TopicsJVMNews Hacker News Java Performance Programming Languages

Project Valhalla Arrives: Value Classes Ship in JDK 28 After a Decade of Work

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Project Valhalla Arrives: Value Classes Ship in JDK 28 After a Decade of Work

Java value classes (JEP 401) arrive in JDK 28 as a preview, removing object identity overhead for dense memory layouts. What changes in your code.

June 19, 2026•8 min read

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