Lambda expressions were added in Java 8 as a way to implement functional programming. They allow short, anonymous blocks of code to be passed around as parameters or returned from methods. A lambda expression takes parameters and returns a value without needing a name or class. They provide a concise way to represent method interfaces via expressions and simplify software development by providing implementations for functional interfaces.
Java Lambda Expressions
LambdaExpressions were added in Java 8.
A lambda expression is a short block of code
which takes in parameters and returns a value.
Lambda expressions are similar to methods,
but they do not need a name and they can be
implemented right in the body of a method.
3.
Java Lambda Expressions
JavaLambda Expressions are Java’s first step into
Functional Programming.
It is an Anonymous function that doesn’t have a
name and doesn’t belong to any class.
It Provides a clear and concise way to represent a
method interface via an expression
It provides the implementation of a Functional
Interface & Simplifies the software development.
4.
Syntax
The simplest lambdaexpression
contains a single parameter and an
expression:
parameter -> expression
5.
Syntax
To use morethan one parameter, wrap
them in parentheses:
(parameter1, parameter2) -> expression
Functional Interface
Functional Interfaceis an interface
that contains exactly one abstract
method.
It can have any number of default or
static methods along with object class
methods.
Java provides pre-defined functional
interfaces to deal with the functional
programming.
Runnable, ActionListener,
Comparable are some of the
8.
Here are justa few of the key
benefits to using lambda
expressions in Java:
Conciseness.
Reduction in code bloat.
Readability.
Elimination of shadow variables.
Encouragement of functional programming.
Code reuse.
Enhanced iterative syntax.
Simplified variable scope.