JEP 186: Collection Literals

[Remi Forax]

On 01/31/2014 09:59 AM, Jochen Theodorou wrote:
> Am 31.01.2014 09:43, schrieb Remi Forax:
> [...]
>> If one day the JDK has persistent collections (and I hope it will),
>> there will be not interface to abstract them.
>> (you can still ask all implementations in the javadoc of the interface
>> to super swear that they are immutable but it's a weak contract).
>
> But the same goes for an abstract base class. So those persistent 
> collections would always have to have only the concrete class and most 
> probably no super class besides Object.
>
> Supporting different implementations then becomes difficult.
>
> bye Jochen
>

if the abstract class is public, yes, but you can make it non public,
like by example the abstract class between StringBuilder and StringBuffer.

cheers,
Rémi