JDK 25 is set for release in September as a long-term support offering following JDK 24. It introduces a preview API for stable values aimed at enhancing the startup speed of Java applications, which allows immutable data objects to be initialized more flexibly than traditional final fields. The other significant change includes the removal of the 32-bit x86 port. These enhancements are designed to facilitate better performance and usability in multi-threaded environments while providing constant-folding optimizations previously restricted to JDK.
JDK 25 introduces a preview API for stable values aimed at enhancing Java application startup times, alongside the removal of the deprecated 32-bit x86 port.
Stable values are immutable data objects treated as constants, ensuring significant performance optimizations and improving flexibility in initialization compared to final fields.
The chief goal of stable values is to optimize Java application startup by separating initialization of application state into manageable segments, enhancing efficiency.
Unlike final fields, stable values allow user code to leverage constant-folding optimizations, ensuring they are initialized at most once in multi-threaded environments.
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