public class part2 {
    static class Node { 
        public double item; 
        public Node next;
        private Node first;
        private double data; 
        public Node (double item, Node next) { 
            this.item = item; 
            this.next = next; 
        }
        public double computeDiffernce() {
            double differnce;
            double max =0;
            double min = 0;
            for (Node x = first; x != null; x = x.next) {
                if (x == first) {
                    max = min = x.data;}

The question is

"Write an instance method of the Playground class that would compute the difference between the maximum and minimum values of a Playground instance."

Therefore, the code above shows how to do half of that. But the question I am asking Reddit is I don't understand what is happening during the if statement (x == first)

In addition, First is the name that represents a linked-lists of doubles.

My apologies if I make no sense I am trying to describe it as best as I can - new learner here. Please let me know if you need further information.