Posted on February 15, 2016February 15, 2018 by arvifox — Leave a commentPECS (Producer Extends Consumer Super) ? super T ? extends T wildcards: upper bound and lower bound https://habrahabr.ru/post/207360/ (pdf) Post navigationPrevious post: Winter sportNext post: UML Tutorial Leave a Reply Cancel replyYou must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.