How do I fix the error where I cannot make a static reference to a non-static input field?

Question

I am learning java. I wrote the following code but I am getting this error \"cant make a static reference to a non static input field\" in Arrayfunction(), when I try to take in

Answer 1

input in your class is an instance variable (since it's not defined as static), which means that each instance of MultidimArrays has one of it's own. static fields or methods (often referred to as "class variables/methods" are shared between all instances of a class.

Since Arrayfunction is static, it cannot refer to instance members of its class - there is no way for it to know which MultidimArray to use. You can either solve this by making input itself static, or by removing the static qualifier from ArrayFunction and create an instance of your class:

public static void main(String args[])
{       
    int array[][] arr = new int[2][3]; //typo here, variable needs a name :)

    System.out.println("Passing array to a function");
    MultidimArray ma = new MultidimArray();
    ma.Arrayfunction(arr);
}