Wayback Machinekoobas.hobune.stream
May JUN Jul
Previous capture 13 Next capture
2021 2022 2023
1 capture
13 Jun 22 - 13 Jun 22
sparklines
Close Help
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
  • Asset Store
  • Get Unity

UNITY ACCOUNT

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account
  • Blog
  • Forums
  • Answers
  • Evangelists
  • User Groups
  • Beta Program
  • Advisory Panel

Navigation

  • Home
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
    • Blog
    • Forums
    • Answers
    • Evangelists
    • User Groups
    • Beta Program
    • Advisory Panel

Unity account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

  • Chinese
  • Spanish
  • Japanese
  • Korean
  • Portuguese
  • Ask a question
  • Spaces
    • Default
    • Help Room
    • META
    • Moderators
    • Topics
    • Questions
    • Users
    • Badges
  • Home /
avatar image
0
Question by Jisho · Jan 06, 2013 at 12:13 AM · c#nullreferenceexceptioninitialization

Nested Class Initialization

I have been getting Nullreference error when I try

NodeList[lcv].MasterNode == TestNode
in the NodeManager class.

The classes in use

public class NodeManager : MonoBehaviour {

 private static int InitialListSize = 100;
 public NodeAccountant[] NodeList = new NodeAccountant[InitialListSize];
 public int NodeCount = 0;
 
 public class NodeAccountant {
     public Node MasterNode = new Node();
     public int[] Neighbors = new int[10];
     public int NieghborCount = 0;
 }

// Use this for initialization void Start () { for(int lcv = 0; lcv < NodeList.Length; lcv++) { NodeList[lcv] = new NodeAccountant(); NodeList[lcv].NieghborCount = 0; }
}

....

}

public class Node : MonoBehaviour {

 public string Team {get; private set;}
 public int NodeIDNum;

 // Use this for initialization
 void Start () {

 }
 
 // Update is called once per frame
 void Update () {
 
 }
 
 public void GenerateNode(string TeamName)
 {
     Team = TeamName;    
 }
 
 public bool IsAlive()
 {
     return(GetComponentInChildren() != null);
 }

}

I know MonoBehavior classes freak out when you use new so I was wondering how do I resolve this issue.

Any help would be greatly appreciated.

On edit added more to NodeManager.

Comment
Add comment
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

1 Reply

· Add your reply
  • Sort: 
avatar image
1
Best Answer

Answer by Bunny83 · Jan 06, 2013 at 01:05 AM

You don't create any instance of your "NodeAccountant" class. All you've done is creating an array with 100 references which are all null. "Normal" classes have to be created with "new".

Your next problem is that you try to create an instance of your Node class with "new". Components (classes derived from MonoBehaviour are components too) can't be created with new. Components can only be created with AddComponent.

You might want to rethink your whole concept. I can't give you more instructions since we don't know the actual purpose of those classes.

Comment
Add comment · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

Your answer

Hint: You can notify a user about this post by typing @username

Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.

Follow this Question

Answers Answers and Comments

9 People are following this question.

avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image

Related Questions

Initialising List array for use in a custom Editor 1 Answer

My Code isnt Initializing networkview with its own Connected Peer 0 Answers

An object reference that seems pretty set-to-an-instance-of-an-object to me 0 Answers

C# Textfield Null Reference Exception 1 Answer

NullReferenceException After A Few Hours? 1 Answer


Enterprise
Social Q&A

Social
Subscribe on YouTube social-youtube Follow on LinkedIn social-linkedin Follow on Twitter social-twitter Follow on Facebook social-facebook Follow on Instagram social-instagram

Footer

  • Purchase
    • Products
    • Subscription
    • Asset Store
    • Unity Gear
    • Resellers
  • Education
    • Students
    • Educators
    • Certification
    • Learn
    • Center of Excellence
  • Download
    • Unity
    • Beta Program
  • Unity Labs
    • Labs
    • Publications
  • Resources
    • Learn platform
    • Community
    • Documentation
    • Unity QA
    • FAQ
    • Services Status
    • Connect
  • About Unity
    • About Us
    • Blog
    • Events
    • Careers
    • Contact
    • Press
    • Partners
    • Affiliates
    • Security
Copyright © 2020 Unity Technologies
  • Legal
  • Privacy Policy
  • Cookies
  • Do Not Sell My Personal Information
  • Cookies Settings
"Unity", Unity logos, and other Unity trademarks are trademarks or registered trademarks of Unity Technologies or its affiliates in the U.S. and elsewhere (more info here). Other names or brands are trademarks of their respective owners.
  • Anonymous
  • Sign in
  • Create
  • Ask a question
  • Spaces
  • Default
  • Help Room
  • META
  • Moderators
  • Explore
  • Topics
  • Questions
  • Users
  • Badges