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 inner class, when ?? 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 "inner class, when ??" Watch "inner class, when ??" New topic

inner class, when ??

Rajeev Ravindran
Ranch Hand

Joined: Aug 27, 2002
Posts: 455
hi all,
could any one tell me the use of inner classes ??
when is it used ??

SCJP, SCWCD, SCBCD, Oracle Certified Professional (SQL n PL/SQL)
Frank Hale
Ranch Hand

Joined: Mar 25, 2000
Posts: 230
Its probably a matter of preference when to use it. However its extremely useful when adding listeners to Swing components. Thats where I've seen it used extensively.
Thomas Paul
mister krabs
Ranch Hand

Joined: May 05, 2000
Posts: 13974
If you have a class that is so tied to another class that it makes no sense for the one class to exist without the other.
An example from the API is the Entry class which is an inner class of the Map class. Entry represents a key-value pair in a Map so it makes sense to make Entry an inner class of Map.

Associate Instructor - Hofstra University
Amazon Top 750 reviewer - Blog - Unresolved References - Book Review Blog
I agree. Here's the link:
subject: inner class, when ??