Find a Node in LinkedList

import java.util.*;


public class Solution{
    class Node{
        int data;
        Node next;
    
        public Node(int data){
            this.data = data;
            this.next = null;
        }
    }
    
    static Node head = null;
    static Node tail = null;
    
    
    
    public void add(int data){
        Node newNode = new Node(data);
        if(head == null){
            head = newNode;
            tail = newNode;
        } else{
            tail.next = newNode;
            tail = newNode;
        }
    }
    
    
    public static int search(Node head , int x){
        Node temp = head;
        int count = 0;
        while(temp != null){
            if(temp.data == x){
                return count;   
            }
            count++;
            temp = temp.next;
        }
        return -1;
    }

    public static void main(String [] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        
        Solution l1 = new Solution();
        while(n != -1){
            l1.add(n);
            n = sc.nextInt();
        }      
        int x = sc.nextInt();
        
        int ans = search(head , x); 
        System.out.println(ans);
    }
}