If your applications require many implementations of functional interfaces, you would have to create many named classes or inline many anonymous class implementations. This would make your code excessively large and difficult to read. Fortunately, Java 8 has provided lambda expressions to represent functional interfaces using a very succinct syntax.
Section 2.1: Lambda Expressions Defined
A lambda expression is used to represent a statement. They were introduced in Java 8 to support functional programming. The basic form of a lambda expression is the following:
lambda_argument_list ...
