Why is this program calculates the number of elements in the list is unsuccessful ?

Such as title,

import java.util.*;
  
  public class Test
  {
  		public static void main(String [] args)	
  		{
         List<String> list = new LinkedList<String>();
         list.add("111");
         list.add("456");
         list.add("789");
         list.add("123");
                             
         ListIterator<String> x = list.listIterator();
        
         int i = 0;
         while(x.hasNext())
         {
         		i++;	
         }
         System.out.println(i);                                   
  		}
  }
  

black window, the mouse has been flashing state, did not show


------ Solution ------- -------------------------------------
plus sentence x in a while loop . next ()
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really as mentioned above , there are the results. Thank you !