『"LazyConstants in JDK 26" [IJN]』のカバーアート

"LazyConstants in JDK 26" [IJN]

"LazyConstants in JDK 26" [IJN]

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概要

Lazily initializing fields in Java is error-prone and undermines constant-folding. JDK 26 comes with JEP 526, which previews LazyConstant, a type that lazily initializes a value through a given Supplier. It executes that supplier at most once successfully and then assigns the value to a field annotated with @Stable, which allows constant folding. This API is also a poster child for how OpenJDK develops and evolves features.

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