Is Java Lambda expression is similar logic of Groovy closure?

Question

I\'m learning about Java 8 new feature Lambda expressions. This is my "HelloWorld" class using Lambda expression

public class LambdaHel         


        

Answer 1

I wanted a simple local closure to pass / execute. I never found this answer anywhere, so adding my spin, so you can see actual mapping from local groovy closure to local java lambda.

Groovy:

def clos = {name -> sayHello(name)} 
clos('John Doe')

Java:

Consumer clos = name -> sayHello(name);
clos.accept("John Doe");

The key being that bloody Consumer interface with accept() method to invoke - you must match the params and return type of your Java lambda based on their pre-canned Function interfaces (java.util.function.*). That bit is a drag, compared to untyped Groovy version.