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Index › Programming Questions & Help › Syntax Questions › ArrayList and color
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ArrayList and color (Read 1121 times)
moka
ArrayList and color
Nov 22nd, 2009, 2:04am  
Hi,

I am currently working on a small, dynamic colorManager class using processings color type and ArrayLists. Unfortunatelly its not as straightforward as I hoped it would be:
Code:

  void addColor(color _c){
    //add color to arraylist
    colors.add(_c);
  }
color getColor(int _id){
   return (color) colors.get(_id);
}


in the get function I get the error Cannot cast from Object to int

I dont really see what I am doing wrong here, any help appreciated!

Thanks
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blindfish
Re: ArrayList and color
Reply #1 - Nov 22nd, 2009, 2:09am  
It's an easy enough mistake to make.  Although Color looks like it's an object it actually just stores an int, which IIRC isn't directly compatible with ArrayLists.  This has been discussed recently on the forum, so a search may clarify.  Basically you may be better off working with normal Arrays, or create an Object that has a colour as a property.
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Where is the what if the what is in why?
 
moka
Re: ArrayList and color
Reply #2 - Nov 22nd, 2009, 2:16am  
thanks, I actually guessed that.- I might just write my own small color class then.- Thanks for the quick reply! Smiley
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PhiLho 
Re: ArrayList and color
Reply #3 - Nov 22nd, 2009, 3:51am  
You just need an additional little sprinkle of magic:
Code:
color getColor(int _id){
   return (color)(Integer) colors.get(_id);
}
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WWW  
moka
Re: ArrayList and color
Reply #4 - Nov 22nd, 2009, 4:02am  
ah, that looks good, I will try that, thanks!
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