No, you can not instantiate an interface. You can only insantiate
implementation classes.

Yes, We cannot instantiate interface  directly
Indirectly we can create an object  of the interface.

e.g.

public interface inf {
public String get();
}

public class c implements inf{
public String get(){
return "worldofharry";
}
}

Now to create the object of interface by

inf inter = (inf)new c();

is there any way that an interface  can instantiate? how?
if it can be done...then what property  that object  would hold?

There is no way the you can instantiate an interface or an abstract class.
You can only instantiate the class implementing the interface or a class
that extends abstract class.

say you have an interface "InterfaceOne" as follows

public interface InterfaceOne
{

public void methodOne();

}


then you have to write a class as follows

public class InterfaceOneImpl implements InterfaceOne
{
public void methodOne()
{
// logic goes here
}
}

Then you can have a statement


InterfaceOne intf=new InterfaceOneImpl();
intf.methodOne();