This week's book giveaway is in the Big Data forum.
We're giving away four copies of Elasticsearch in Action and have Radu Gheorghe & Matthew Lee Hinman on-line!
See this thread for details.
The moose likes Beginning Java and the fly likes doubt on Enumeration interface Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of Elasticsearch in Action this week in the Big Data forum!
JavaRanch » Java Forums » Java » Beginning Java
Bookmark "doubt on Enumeration interface" Watch "doubt on Enumeration interface" New topic

doubt on Enumeration interface

lhari krishna

Joined: May 17, 2007
Posts: 5
hello all,
elements() of vector class returns Enumeration object,but where as this class is not implementing Enumeration interface.But i have seen the follwing statements in a ppt searched on net.
"An object that implements the Enumeration interface generates a series of elements, one at a time. "
How an object is providing implementation for methods in Enumeration Interface

Thank you,
hari krishna
Rob Spoor

Joined: Oct 27, 2005
Posts: 19911

It's using an inner class that implements Enumeration but is not available in the API.

This sort of thing happens all the time. Methods that return interfaces or abstract classes use some implementation of those interfaces or subclass of those abstract classes that can be instantiated, then return an instance of those classes.

How To Ask Questions How To Answer Questions
It is sorta covered in the JavaRanch Style Guide.
subject: doubt on Enumeration interface