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Thread: Interface

  1. #1

    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
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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
    Senior Member andbin's Avatar
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    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%)

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