[Advanced-java] Interface and Object class

[BHARAT MEHTA]

Hi* **Ever*yone*,*I came across this post while searching on Google. Here it
goes:

I don't think so that an interface is derived from object. In the code
below:

    Test t = new Test();
    ITest it = t;
    Object ob = it;
    System.out.println(it.toString());

the  toString() method is called using reference of Interface ITest
which ultimately points to the object of type Test(which is a kind of
subclass for Object class).
Now when we say it.toString() the method that is being called is
method on the object of class Test. JVM checks the type of the object
at the run time here (which happens to be of Test(a child of Object)
type)

Thanks,
Bharat Mehta

Interface and Object class *Sunil Jain* SJain at eGain.com
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*Thu May 18 11:54:22 PDT 2000*

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------------------------------

Are Interfaces derived from Object class ?
The following java program works, how ??

class Test  implements ITest{

  public static void main(String[] args){
    Test t = new Test();
    ITest it = t;
    Object ob = it;
    System.out.println(it.toString());
  }

  public void add(){
  }
}
------------------------------------------
interface ITest{
  void add();
}
-------------------------------------------

Sunil Jain





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