File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Java in General and the fly likes class Immutable Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Java in General
Bookmark "class Immutable" Watch "class Immutable" New topic

class Immutable

sreejith panampilly
Ranch Hand

Joined: Jun 15, 2006
Posts: 49
how can make a class Immutable?
Ernest Friedman-Hill
author and iconoclast

Joined: Jul 08, 2003
Posts: 24199

Very simply, don't provide any way to modify any of the member variables. It's that simple. Make sure they're all private, and preferably final, and don't change them after the constructor.

[Jess in Action][AskingGoodQuestions]
I agree. Here's the link:
subject: class Immutable
It's not a secret anymore!