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Interface in Java


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What exactly happens when a class implements an interface? I am a little confused with this.

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interface contains methods without body. if any class implements a interface it must define the body. interface gives consistency between classes who uses them. oppose to multiple inheritance language like c++, java is single inheritance language. here in java interface gives classes to use and share multiple behavior among different classes.

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An interface allows multiple independent classes to be used in the same way. The interface tells the class the name of the methods it has to implement, but each class can implement the methods however suits it best.

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  • 2 weeks later...
http://docs.oracle.c.../interface.html since classes define the state and behavior of objects (like a blueprint), think of an interface as a class that is the blueprint for another class. Edited by thescientist
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