RFR (M): JDK-6394757: rev1: AbstractSet.removeAll semantics are surprisingly dependent on relative sizes

Peter Levart peter.levart at gmail.com
Mon May 27 08:35:33 UTC 2019

On 5/26/19 6:25 PM, Martin Buchholz wrote:
> On Mon, May 13, 2019 at 5:29 PM Stuart Marks <stuart.marks at oracle.com>
> wrote:
>>    - addition of FIXME comment and reference to javadoc bug report, where
>> doc
>> comment from interface cannot be inherited
> This is yet another symptom of Java's fundamental design mistake of being
> unable to simply inherit implementation, that we have learned to live with.
> "Inheritance is not subtyping"

One way of inheriting "only implementation" is to have a package-private 
superclass with public methods. (AbstractStringBuilder for example). It 
confines all implementations (subclasses) to the same package though, so 
it is not a universal tool. With jigsaw there is another possibility: a 
public but internal (confined) superclass which is exported just to 
modules that need to subclass it.

Regards, Peter

More information about the core-libs-dev mailing list