Java uses empty interfaces to tag, that is, mark object classes that are to be singled out for special treatment. Empty interface examples include Cloneable, Serializable, and UIResource.

In java interfaces are group of methods with empty bodies we use keyword (implement) in interfaces as we use extend keyword in inheritance. We can make reference of interface but we can not make make ...

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Java's interface language feature often puzzles newcomers to this language. Jeff eliminates this mystery by presenting the six roles that interfaces play in the Java language.