Javadoc (b116) lacks @FunctionalInterface on Observer signature

Paul Benedict pbenedict at
Thu Nov 21 19:50:16 PST 2013

Alright, I suppose. Very surprising to see such a distinction being made in
these reports; I think the output is not intuitive, but at least I can
explain it to someone else now.

On Thu, Nov 21, 2013 at 9:43 PM, Joe Darcy <joe.darcy at> wrote:

> On 11/21/2013 07:40 PM, Paul Benedict wrote:
>> Look at, Closeable, as an example. You removed the @FunctionalInterface
>> annotation but the javadocs still report it as a functional interface in
>> the class description.
> Yes, that is the correct and expected outcome.
> The type meets the JLS definition of a functional
> interface and gets reported accordingly by javac. However, it is not
> morally a functional interface so it no longer has the @FunctionalInterface
> annotation, an annotation which indicates intentions towards usage and
> interface evolution.
> -Joe


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