Question

I have created an array of custom objects in my processing code and then proceed to init it. However, for some reason I run into a null pointer exception at: objectArray[i].siteID = 5;

I have spent the last 2 hours trying to find info on how to fix this but the syntax seems to be correct!

Code:

class TtalkObject{
  int siteID = 0;
  String URL = "test";
  int commentNum = 5;
  int averageLength = 5;

}

PFont f;
TtalkObject[] objectArray;
int whatObjectPart = 0;
int whatObject = 0;

void setup()
{
    size(300,300);
    f=createFont("Arial",16,true);
    objectArray = new TtalkObject[50];

    for (int i = 0; i < 50; i ++){
        objectArray[i].siteID = 5;
        objectArray[i].URL = "test";
        objectArray[i].commentNum = 10;
        objectArray[i].averageLength = 10; 
    }

}

Answer 1

Looks like you’re never creating an instance of your TtalkObject, you’re just initializing an array to hold fifty of those objects.

I’m not familiar with java syntax, in c# it’d be

for (int i = 0; i < 50; i ++){
 objectArray[i] = new TtalkObject();
 objectArray[i].siteID = 5;
 objectArray[i].URL = "test";
 objectArray[i].commentNum = 10;
 objectArray[i].averageLength = 10;
}