It's not binary compatible, as changing the return type results in a new
method that compiled code won't be able to find.
See also "change result type (including void)" here:
https://wiki.eclipse.org/Evolving_Java-based_APIs_2#Evolving_API_interfaces_-_API_methods
--John
On 30/05/2022 03:22, Nir Lisker wrote:
Hi,
Picking up an old issue, JDK-8091393 [1], I went ahead and looked at the
work needed to implement it.
keySet() and entrySet() can both be made to return ObservableSet rather
easily. values() will probably require an ObservableCollection<E> type.
Before discussing these details, my question is: is it backwards compatible
to require that these methods now return a more refined type? I think that
it will break implementations of ObservableMap out in the wild if it
overrides these methods in Map. What is the assessment here?
https://bugs.openjdk.java.net/browse/JDK-8091393
