Java 21 New Feature: Sequenced Collections - JEP Cafe #19

Learn the principles of the Sequenced Collections, Sets, and Maps, a new feature introduced in JDK 21. Sequenced Collections are about modelling collections with a defined encounter order, giving you direct access to their first and last element. Learn about the new Sequenced Collections API, part of the Collections Framework, introduced in JDK 21. ⎯⎯⎯⎯⎯⎯ Chapters ⎯⎯⎯⎯⎯⎯ 0:00 Intro 1:19 Introducing the architecture of the Collections API 2:38 What does it mean for a collection to be sorted 3:46 Ordering elements in a collection with an index 4:53 Differences between Lists and SortedSets 5:22 Defining the encounter order for List, Set, and SortedSet 8:10 Properties of LinkedHashSet 9:09 Common behavior between List, SortedSet and LinkedHashSet 9:58 Defining the behavior of sequenced collections 12:10 Adding SequencedCollection and SequencedSet to the Collections API 13:27 Making Deque implement SequencedCollection 15:41 Iterating over the elements of a Map 17:18 Iterating over the elements of a SortedMap or NavigableMap 18:06 Introducing SequencedMap 19:06 Creating unmodifiable views with the Collections factory class 19:16 Outro ⎯⎯⎯⎯⎯⎯ Resources ⎯⎯⎯⎯⎯⎯ ◦ JEP 431: Sequenced Collections ➱ https://openjdk.org/jeps/431 ◦ Inside Java Newscast #50 on JDK 21: https://youtu.be/qGaUZ1Z34jw ◦ Inside Java Newscast #45 on Sequenced Collections: https://youtu.be/9G_0el3RWPE ◦ Dev.java ➱ https://dev.java ◦ Inside.java ➱ https://inside.java ◦ JDK 21 ➱ https://openjdk.org/projects/jdk/21 ◦ OpenJDK ➱ https://openjdk.org ◦ Oracle Java ➱ https://www.oracle.com/java/ Tags: #Java #Java21 #OpenJDK #JDK #JDK21 #Collection #JEPCafe #insidejava