Posted on February 15, 2016February 15, 2018 by arvifox — Leave a comment

PECS (Producer Extends Consumer Super)

? super T

? extends T

wildcards: upper bound and lower bound

https://habrahabr.ru/post/207360/ (pdf)

Leave a Reply

You must be logged in to post a comment.

This site uses Akismet to reduce spam. Learn how your comment data is processed.