Jump to content
  • Advertisement


This topic is now archived and is closed to further replies.


[java] Casting

This topic is 5730 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

I''m building a simple (they all start off simple, don''t they) game engine for a final project at my school. I''m implementing a resource manager for the engine. The way I''m implementing it is the have a base abstract class Node which has other classes(AudioNode, ImageNode) devrived from it. I have a linked list that is used to muve through the data. I''m using the Node class as the class to pint to the next node which makes it that I haveto cast all the nodes into their proper type when I want to use them. THis all is working, but I recently read that preforming casts is an expensive operation. What my question is, is should I keep the current method, make seperate linked lists for all the different classes, or something else?

Share this post

Link to post
Share on other sites

Without more background I can not help you much.

Why did you make a design like this ?
What does the Node class definition contain ? What''s common among those nodes (Audio, Image ...) that you put it into one base class for all those parts ?

And about performing casts ....

If you don''t need to have all those Nodes in one list, don''t do that - you prevent all that casts in case they would prove costly (but I really doubt it - IMHO a cast can be done in constant time).

But always make the program work first and optimize it afterwards!

If you''re looking for ways to optimize your code, then ask yourself:
  • am I using the appropriate containers (LinkedLists retain order, ArrayLists for indexed element retrieval, HashMaps give key-value mappings, TreeSets keep elements ordered)
  • are there not many superfluous objects created ?
  • do I use buffered I/O operations?
  • et cetera, et cetera ...

That will have to do for the info you provided.

have a nice day/night (depending on your timezone)

Petr Stedry

Share this post

Link to post
Share on other sites

  • Advertisement

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!