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Difference between Abstract and Interface June 23, 2005

Posted by javafoo in java interview, javanotes, OOAD.
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  • Interface only provides the contract, does not add default behaviour, whereas abstract classes provide default behaviour (not necessarily, only if you want to, but that is the point)
  • You can implement as many interfaces as you may want, but only extend from one abstract class
  • You cannot have private, protected variables in an Interface.

Comments»

1. Ani - April 21, 2008

Nice thats i want to know….


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