Am 10.04.2013 20:24, schrieb Remi Forax:
interface + default methods are conceptually what is known as traits(*),
you can see them as interface + method with code or as abstract class without 
state,
it's the same thing.

Thanks, that's what I wanted to make sure.

Now, if you want traits in Java, you have 3 choices: add a new kind of type, 
trait,
introduce a stateless abstract class or add default methods to interface.
All these changes require to change the VM, so all of them are *big* changes.
The lambda expert group studies each solution and adding default methods
to interface is the path that creates less problems, that why it was chosen.

Thanks Rémi, that's the info I was missing, you really considered abstract 
classes in your studies :-)

-Ulf

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