This question was closed May 29, 2018 at 11:54 PM by mat9054 for the following reason:

The question is answered, right answer was accepted

Question by mat9054 · May 29, 2018 at 09:46 PM · c#array script.runtime

Initiate class array at start and assign class values.

I am having problems instantiating a class array and assigning value at each instance of the class on Start. I am getting NullReferenceException: Object reference not set to an instance of an object. The bool and int assignement cause this problem.

Here is an exemple of what i am trying to achieve.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 [System.Serializable]
 public class TESTER
 {
     public bool boolean = false;
     public int interger = 10;
 }
 
 public class TEST : MonoBehaviour {
 
     public TESTER[] testers;
 
     void Start () {
         testers = new TESTER[20];
         Testing();
     }
 
     void Testing()
     {
         foreach(TESTER currentTest in testers)
         {
             currentTest.boolean = true;
             currentTest.interger = 20;
         }
     }
 }

Add comment · Show 2

bobisgod234 · May 29, 2018 at 11:14 PM 2

Tester, being a reference type (class) will be null unless you initialize it. When you create a new array of 20 Tester, each element of the array is initially null.

You can initialize the array like this:

      void Start () {
          testers = new TESTER[20];
          for (int i = 0; i < testers.length; i++)
              testers[i] = new TESTER();
          Testing();
      }

Or alternatively, turn your Tester class into a struct.