Collections

https://dzone.com/articles/the-best-of-java-collections-tutorials


http://falkhausen.de/Java-10/java.util/Collection-Hierarchy.html hyerarchy

https://dzone.com/articles/a-deep-dive-into-collections

https://dzone.com/articles/the-developers-guide-to-collections-lists

https://dzone.com/articles/the-developers-guide-to-collections-sets

https://dzone.com/articles/the-developers-guide-to-collections-queues