Another not-sure qstn from Jammi..

[maha anna]

The foll. qstn is asked in both Jaworski and Chris Mock Exam applets. But they both give different answers. In Chris Exam, ans 2) is given false. He says adapter classes give no-implementation. They don't give default-implementation.
But in Jammi ans 2) is said to be true. We know that All adapter classes define empty methods. What you all think is the appropriate ans. for the exam ?
Thank you.
regds
maha anna
Which of the foll. statements are true ?
1. Event listeners are interfaces that define methods that
event-handling classes must implement.
2. An event adapter is a class that provides a default implementation of an event listener
3. EventListeners and Adapter classes are deprecated in Java 2 Event Handling
4. The WindowAdapter class is used to handle window-related events

[This message has been edited by maha anna (edited April 05, 2000).]

[Kondal Rao]

Originally posted by maha anna:
The foll. qstn is asked in both Jaworski and Chris Mock Exam applets. But they both give different answers. In Chris Exam, ans 2) is given false. He says adapter classes give no-implementation. They don't give default-implementation.
But in Jammi ans 2) is said to be true. We know that All adapter classes define empty methods. What you all think is the appropriate ans. for the exam ?
Thank you.
regds
maha anna
[b]Which of the foll. statements are true ?
1. Event listeners are interfaces that define methods that
event-handling classes must implement.
2. An event adapter is a class that provides a default implementation of an event listener
3. EventListeners and Adapter classes are deprecated in Java 2 Event Handling
4. The WindowAdapter class is used to handle window-related events

[This message has been edited by maha anna (edited April 05, 2000).][/B]

Maha,
I am a new visitor to this site. I found this site yesterday and found very useful for the Java 2 Certification preparation.
My answer to the above question: Option 2 is false. Because Adapter classes do not provide default implementation, instead they provide empty body. I mean, when you say default implementation they should do something. Hope this helps.
Regards,
Kondal.

[Jim Yingst]

From a Java point of view, an interface is "implemented" if all its methods are given definitions and are not abstract. If the definition of the method is basically "do nothing" (empty braces), Java doesn't care - the interface has still been implemented by the class. Logically then whatever it does is an "implementation". If the question was to test whether people know that the adapter methods don't do anything, it should be re-phrased, in my opinion.

[Eric Barnhill]

If this isn't implementation, then I would like to know, what is implementation? Is there a certain amount of code that qualifies, or something it has to do? For that reason I would say this is true, maybe I'm wrong.
Eric