Meaning of :: in Java syntax -

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this question has answer here:

what meaning of :: in following code?

set<string> set = people.stream()                         .map(person::getname)                         .collect(collectors.tocollection(treeset::new));

this method reference. added in java 8.

treeset::new refers default constructor of treeset.

in general a::b refers method b in class a.


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