Java Set

The Java Set interface represents a set (collection) of objects in Java which is unordered, and where each element is unique, meaning each element is only present once in a Java Set. A Java Set is a handy way to sort out duplicats from an array or List. Add all the elements to a Java Set, and each element will only exist once in the Set when you are done. This is different from a Java List or arrays where the elements can be present multiple times.

Chapters
0:00 Java Set introduction
0:45 Java Set vs. Java List
1:36 Java Set implementations
2:43 Java Set generic types
3:26 Add elements to a Java Set
4:44 Create Set using Set.of()
5:07 Iterate elements of a Java Set using Iterator
6:14 Java HashSet vs. Java TreeSet
7:22 Iterate elements of a Java Set using for-each loop
8:05 Iterate elements of a Java Set using the Java Streams API
9:07 Remove element from a Java Set
10:06 Remove all elements from a Java Set
10:18 Add all elements from a Java Collection to a Java Set
11:22 Remove all elements in a Java Collection from a Java Set
12:10 Retain all elements from a Java Collection in a Java Set
12:54 Java Set size - obtain number of elements in a Java Set
13:24 Check if Java Set is empty
13:50 Check if Java Set contains specific element
14:34 Convert Java Set to a Java List

Here is a textual version of this Java Set tutorial:
http://tutorials.jenkov.com/java-collections/set.html

Here are links to my Java List tutorials:
http://tutorials.jenkov.com/java-collections/list.html
https://www.youtube.com/watch?v=d3QbptJRln4

Java Streams Tutorial - text / video:
http://tutorials.jenkov.com/java-functional-programming/streams.html
https://www.youtube.com/watch?v=bcrl-GL0vV4

Видео Java Set канала Jakob Jenkov