Does java support inline declaration and assignment in a conditional statement?

Question

(Closed.) This question is not reproducible or was caused by typos. It is not currently accepting answers. question from:https://stackoverflow.com/questions/66056081/does-java-support-inline-declaration-and-assignment-in-a-conditional-statement

Answer 1

NO, the inline declaration of a variable in a statement is not only valid in a for loop.

It is also valid in try-with-resource statement, JLS 14.20.3:

... A resource specification uses variables to denote resources for the try statement, either by declaring local variables with initializer expressions or ...

Example:

try (var rd = new BufferedReader(...)) {
    ...
}

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After searching the JLS 19 Syntax page, I believe only the two for statements and the try-with-resource statement accept this kind of declaration (despite Lambda-expressions).

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Confirmed by JLS 14.4. Local Variable Declaration Statements:

Apart from local variable declaration statements, a local variable can be declared by the header of a basic for statement (§14.14.1), an enhanced for statement (§14.14.2), or a try-with-resources statement (§14.20.3).