JShell Examples: Collections Static Factory Methods
DZone 's Guide to
JShell Examples: Collections Static Factory Methods
Explore Java 9's JShell and how you can use it to create static factory methods for collections, particularly with Lists, Sets, and Maps.
Join the DZone community and get the full member experience.
Join For FreeThis post continues my exploration of Java 9 features from my My Top Java 9 Features blog post. Here, we are experimenting with Java 9 Collections Static Factory Methods in the List, Set, and Map interfaces.
Collections Static Factory Methods
Java 9 makes it easier to create immutable lists using its new static Factory Methods.
List and Set
There are 12 Set.of and List.of methods:
- List.of() or Set.of()
- List.of(E e1) or Set.of(E e1) to E e10
- List.of(E… elements) or Set.of(E… elements)
Examples
jshell> Set.of()
$1 ==> []
| created scratch variable $1 : Set<Object>Topics:
collections,
factory methods,
java,
java 9,
jshell,
tutorial
Published at DZone with permission of Martin Farrell , DZone MVB. See the original article here.
Opinions expressed by DZone contributors are their own.
{{ parent.title || parent.header.title}}
{{ parent.tldr }}
{{ parent.linkDescription }}
{{ parent.urlSource.name }}