public class temp {
    public class Node {
    int data;
    Node next;

    Node(int data1, Node next1) {
        this.data = data1;
        this.next = next1;
    }

    Node(int data1) {
        this.data = data1;
        this.next = null;
    }
    }
    
    public static void main (String args[]) {
        int arr[] = {2,4,6,8};
        Node y = new Node(arr[3]);
        System.out.println(y.data);
    }

}

error: non-static variable this cannot be referenced from a static context
Node y = new Node(arr[3]);
^

created instance of class Node still showing error