Question

Excuse my ignorance. I’m a beginner:

Why is the following code giving me the following compiling error?
[line: 16] non-static variable x cannot be referenced from a static context

public class average{
int [] numbers = {2,3,4,5,6};
double x = averageMark(numbers);

public static double averageMark(int [] numbers){
    int sum = 0;  
    double average = 0.000;
    for (int i = 0; i < numbers.length; i++){  
      sum = numbers [i] + sum;  
      average = sum/numbers.length;  
    }
    return average;
  }

  public static void main (String [] args){
  System.out.println(x);
  }
}

Answer 1

The error says it all

non-static variable x cannot be referenced from a static context

you have to either make it x static variable.

static double x = averageMark(numbers);

or create an instance of Average and access it.

 public static void main (String [] args){
   System.out.println(new Average().x);
  }

Btw, its a convention that your class names should start with Uppercase.

as @ mgaert noted you need to make numbers array static as well, cuz you use it in a static method.

static int [] numbers = {2,3,4,5,6};