Why drainTo is not present in regular collection framework?

[The_Nick]

I was wondering why the method drainTo http://docs.oracle.com/javase/7/docs/ap ... ,%20int%29 of the BlockingQueue interface is not present in the Queue or any other interface belonging to the non-concurrent colletion framework.
Since one of the topic of concurrency for the exam is :

Use collections from the java.util.concurrent package with a focus on the advantages over and differences from the traditional java.util collections.

I am kindly asking why.


Thanks in advance.

The_Nick.

[admin]

Not really sure why. Oracle can answer that better