Two Laptop Bag*
The moose likes Java in General and the fly likes what are the advantages of implementing interface over extending class ??? Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of Java 8 in Action this week in the Java 8 forum!
JavaRanch » Java Forums » Java » Java in General
Bookmark "what are the advantages of implementing interface over extending class ???" Watch "what are the advantages of implementing interface over extending class ???" New topic
Author

what are the advantages of implementing interface over extending class ???

Jigar Naik
Ranch Hand

Joined: Dec 12, 2006
Posts: 751
can anybody tell me all the advantages of implementing interface over extending class ???


Jigar Naik


Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 36598
    
  16
This goes with your other question.

You can mimic multiple inheritance by implementing several interfaces. The problem with diamond inheritance Jesper Young mentioned doesn't apply if you have two methods with the same signature, if both methods are completely empty.

You can implement several interfaces and only extend one class. An interface provides a set of method headers; any method using your object under the name of its interfaces can rely on those methods being available, particularly if you have implemented them according to the instructions for the interface.

Read the API documentation for Comparable<T> for an example.
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: what are the advantages of implementing interface over extending class ???
 
Similar Threads
Extending Thread or implementing Runnable
Multithreading
Extending Thread over Implementing Runnable
Runnable Interface VS Thread Class
subtype and subclass