SelectivePair: Lambdafy it

[RobbingDaHood]

https://docs.oracle.com/javase/tutorial/java/javaOO/methodreferences.html

And maybe other interesting features from java 8

[RobbingDaHood]

http://www.oracle.com/technetwork/java/javase/8-whats-new-2157071.html

[RobbingDaHood]

http://docs.oracle.com/javase/tutorial/collections/streams/index.html