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Thread: Interface

  1. #1
    Junior Member
    Join Date
    Feb 2014
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    Default Interface

    hey guys i am not getting one point that where to use implements and where extends...

    please make me understand..

    interface I1{
      void greet();
    interface I2{
       void show()
    interface I3 extends I1,I2{ // why we use extends here rather than implements
       void info();

  2. #2
    Super Moderator
    Join Date
    Jun 2013
    So. Maryland, USA
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    Default Re: Interface

    Have you read the Java tutorials on the subjects? I'm going to request you start there and then come back with any questions you have after that.

    What is an interface?
    Interfaces and Inheritance (read both trails)

  3. #3
    Member andbin's Avatar
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    Dec 2013
    Thanked 122 Times in 114 Posts

    Default Re: Interface

    Quote Originally Posted by gautammuktsar@gmail.com View Post
    that where to use implements and where extends...
    A class can extend only one other class and can implement N interfaces.
    An interface can extend N other interfaces.

    These are the basic rules.
    Andrea, www.andbin.net SCJP 5 (91%) SCWCD 5 (94%)

    Useful links for Java beginners My new project Java Examples on Google Code

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