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A tiny puzzler: Is this valid Java? import java.util.function.Predicate; public class Test { Predicate<String> f = (var a) -> a.isEmpty(); }

Sebastian Lövdahl

@slovdahl.bsky.social

25 Jan

Yes, to make it possible to annotate lambda parameters without having to specify the full type?

Johannes Bechberger

@mostlynerdless.de

"Align the syntax of a formal parameter declaration in an implicitly typed lambda expression with the syntax of a local variable declaration." (from the openjdk.org/jeps/323)

openjdk.orgJEP 323: Local-Variable Syntax for Lambda Parameters

25/1/26, 8:56 pm0 reposts0 likes

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