Javadoc (b116) lacks @FunctionalInterface on Observer signature
joe.darcy at oracle.com
Thu Nov 21 19:43:16 PST 2013
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 java.io.Closeable 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.
More information about the lambda-dev