Lovely post from Anton Arhipov at JRebel, Java 8: The First Taste of Lambdas. Kudos for
javap decompilation for an "under the hood" explanation. His conclusion:
We can definitely say that lambdas and the accompanied features (defender methods, collections library improvements) will have a great impact on Java very soon. The syntax is quite nice and once developers realize that these features provide value to their productivity, we will see a lot of code that leverages these features.
It was quite interesting for me to see what lambdas are compiled to and I was very happy when I saw the total utilization of the invokedynamic instruction in action without any anonymous inner classes involved at all.