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Question by Le-Capitaine · Sep 04, 2014 at 01:09 PM · c#nullreferenceexceptionlistsnewcustom class

Does a new instance of a custom class return null?

 List<ObjectPool> bulletPools;
 List<ObjectPool> AIPools;
 
 void MakePools () {
     for (int i = 0; i < game.bulletPools; i++) {
         bulletPools.Add (new ObjectPool()); //NRE here
     }
     for (int i = 0; i < game.AIPools; i++) {
         AIPools.Add (new ObjectPool());
     }
 }

The lists aren't public and game is tested and properly initialised; its pool values are both 100. The script uses System.Collections.Generic. Built-in arrays have been tried to no more success. I tried initialising my new ObjectPool into a variable on a separate line and adding that; no dice. I really don't have the slightest idea just what it is that I'm doing wrong.

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avatar image GameVortex · Sep 04, 2014 at 01:13 PM 0
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You have to initialize your lists before using them.

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Answer by superdudeman · Sep 04, 2014 at 01:22 PM

Try this when declaring the variables.

 List<ObjectPool> bulletPools = new List<ObjectPool>();
 List<ObjectPool> AIPools = new List<ObjectPool>();
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avatar image supericecream · Sep 04, 2014 at 01:26 PM 0
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lol... just as I posted

avatar image Le-Capitaine · Sep 04, 2014 at 01:30 PM 0
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Yup, I'm just that much of a bloody idiot, am I. ._.

Thanks and thanks again.

avatar image superdudeman · Sep 04, 2014 at 01:34 PM 0
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It happens to the best of us!

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Answer by supericecream · Sep 04, 2014 at 01:25 PM

You probably didn't initialize the lists like such:

bulletPools = new List();

AIPools = new List();

I'm I wrong in this?

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