CODEWITHSUNDEEP
javacompiler-errorsset
Hans Kistelstein
Hans Kistelstein

Reputation: 33

The method of() is undefined for the type Set

when i'm trying to run this code:

Set<Set<Integer>> s1 = Set.of(Set.of(), Set.of(1));

i'm getting this error:

The method of() is undefined for the type Set
The method of(int) is undefined for the type Set

I'm using Java 8. What is wrong? :/

Upvotes: 3

Views: 7303

Answers (1)

Tom Hawtin - tackline
Tom Hawtin - tackline

Reputation: 147164

These methods were introduced in Java SE 9. See the @since in the source code on the API docs. You'll need to upgrade to a current version of Java or use something else, such as new HashSet<>(Arrays.asList(fred, jim, sheila)).

Upvotes: 5

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