Marker interface pattern: Difference between revisions

Revision as of 22:20, 1 May 2022

Revision as of 23:13, 2 May 2022

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| chapter-url-access = registration

| chapter-url = https://archive.org/details/effectivejava00bloc_0/page/179

}}</ref> (also called '''tagging interface''') which is an empty interface,<ref>{{Cite web |date=2017-03-06 |title=Marker interface in Java |url=https://www.geeksforgeeks.org/marker-interface-java/ |access-date=2022-05-01 |website=GeeksforGeeks |language=en-us}}</ref>, and methods that interact with instances of that class test for the existence of the interface. Whereas a typical [[interface (computer science)|interface]] specifies functionality (in the form of method declarations) that an implementing class must support, a marker interface need not do so. The mere presence of such an interface indicates specific behavior on the part of the implementing class. Hybrid interfaces, which both act as markers and specify required methods, are possible but may prove confusing if improperly used.

== Example ==