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Question: What is the difference between an Interface and Abstract Class In Java

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User: mohit555 Post Date: 07 Feb 2012 09:56

Introduction:
What is the difference between an Interface and Abstract Class In Java



Answer:
  1.An Interface in java Have no implementation code in methods

    But An Abstract class in java may have both Implementation

    as well as nOn implementation Methods.

  2.A Class in java can implement any number of interface

    but a class in java can implement(Inherit) only one Abstract Class.

  3.An Interface in java can not have a constructor

    But an Abstract class can have a constructor.

  4.All members of an Interface in java must be public

    But All memebers of an Abstract class may not be public

  5.There is no instance method for an Interface

    While there may be instance method for Abstract Class.



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