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What happens when the AutoCloseable resource is null in Java Try-With-Resource?

A null resource in try-with-resources is skipped; close is not called. The try body still runs. A later NPE is from your code, not from close.

A resource is closed only if it is initialized to a non-null value. If the reference is null, no attempt is made to call close() on it, no NullPointerException is thrown, and it works as expected.

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