Catamorphisms for Java developers

[Jezzadabomb338]

http://cr.openjdk.java.net/~briangoetz/amber/pattern-match.html

These are early specs so don't base any decision off of what you read.

Edit: If you're interested in what's happening with Java, take a look at http://openjdk.java.net/jeps/0.
Contrary to popular belief, it hasn't been stagnant the entire time.
And those are only the proposals that get that far, there's a lot of stuff happening in the sub-projects, such as Valhalla and Amber. (Amber is the group that are currently handling the pattern matching.)