Java 8 Lambda Expressions: Difference between revisions

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An interface with only one method is named ''functional interface''
An interface with only one method is named ''functional interface''
<font color=re>Apparently this is the ''type of a lambda expression'', it describe the function signature.


=The Type of a Lambda Expression=
=The Type of a Lambda Expression=

Revision as of 02:16, 28 November 2016

External

Internal

Overview

A lambda expression can be thought of as an anonymous methods. As shown in the "Syntax" section below, a lambda expression looks a lot like a method declaration.

Functional Interface

An interface with only one method is named functional interface

Apparently this is the type of a lambda expression, it describe the function signature.

The Type of a Lambda Expression

TODO

Syntax

A lambda expression consists in a comma-separated list of formal parameters, enclosed in parentheses, followed by the arrow token "->" followed by a body, which may be a single expression or a statement block.

(comma_separated_formal_parameter_list) -> body

Formal Parameters

The type of the parameters may be omitted.

If there is a single parameter, the enclosed parentheses may be omitted.

Body

The body may be a single expression, or a statement block.

Referencing a Lambda Expression

Method References