Hi tselvi,
You* cannot return an interface *but you *can return an object from one
class implementing the interface*
See again this text and try to understand the fact that you cannot
instantiate "interface objects", they are abstract, I have completed with *
red* to explain better.
// You can assign the object instance from class implementing
interface to
// AnotherInterfaceExample type.
AnotherInterfaceExample anotherinterfaceexample1 = person1;
from Code-3.12: Modified Main.java
in this page
http://www.javapassion.com/handsonlabs/javainterface/index.html#Exercise_3
Probably you should write something like this
public AddressInterface getAddress() {
return new AddressImpl();//this is the class implementing the interface,
//so you can return this instead
AddressInterface
//sure, you must return an object AddressImpl from the exercise, probably,
//and not an empty one, but I think you figured already
}
-----------------------------------------------------------------------------------------------------------------
Yes, I see now. You have commented this code
*AddressImpl address = new AddressImpl();*
Well, remove the comment it and write this
public AddressInterface getAddress() {
return address;//this is the class implementing the interface,
//so you can return this instead AddressInterface
}
*And yes, you must read these
*http://java.sun.com/docs/books/tutorial/java/IandI/abstract.html
http://java.sun.com/docs/books/tutorial/java/IandI/index.html
Best regards,
Vasile Braileanu
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/javaprogrammingwithpassion?hl=en
-~----------~----~----~----~------~----~------~--~---
