Java - Lambdas: Difference between revisions

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==Functional Interfaces==
==Functional Interfaces==
Arrays.sort(strings, String::compareToIgnoreCase)


==Use==
==Use==

Revision as of 15:50, 18 October 2019

Lambdas

Syntax

<source lang="java">

(String first, String second) -> Integer.compare(first.length(), second.length())

</source>

Functional Interfaces

Arrays.sort(strings, String::compareToIgnoreCase)

Use

Use Functional Interfaces https://docs.oracle.com/javase/8/docs/api/java/lang/FunctionalInterface.html They have only one method

Questions & Answers

concrete methods interface methode default implementee = interface fonctionnelle

  • if a class implements two interfaces with the same name method: multiplicatedefaulterror

je ne peux utiliser que les variables finales dans une lambda expression lambda n'est pas thread safe

Loops

INTERNAL: nouveau foreach ==> je ne veux pas savoir ce ton implementation: fais le avec la lambda que je te donne EXTERNAL: ancien foreach, a BANNIR