Function identity example

Description

Function identity returns a function that always returns its input argument.

Syntax

identity has the following syntax.


static <T> Function<T,T> identity()

Example

The following example shows how to use identity.


import java.util.function.Function;
//from   w w w.  jav  a2  s.  c  om
public class Main {

  public static void main(String[] args) {
    Function<Integer,Integer> id = Function.identity();
    
    System.out.println(id.apply(3));

  }
}

The code above generates the following result.