Java lambdas is a powerful feature that comes with java 8. The idea is, this is an anonymous function( has no identifier) that can be passed as method parameters (Bit like javascript functions that can be passed as arguments to a function). These are also called first class functions. An article on explaining this concept can be found here.
http://java.dzone.com/articles/java-lambda-expressions-basics
http://java.dzone.com/articles/java-lambda-expressions-basics
