ArrayList.toString versus iterating through the ArrayList

My understanding is that the toString method for an ArrayList will call 
the respective toString method for each element of the ArrayList.

However, in the below code, calling guests.toString() gives no output.

I think that I must be doing something wrong that the printGuests method 
must even exist, but I'm not sure what -- I just want to print all the 
guests.

thufir@[EMAIL PROTECTED]
 
thufir@[EMAIL PROTECTED]
 cat src/a00720398/labs/Lab2.java 

package a00720398.labs;
import a00720398.data.*;
import java.util.*;


public class Lab2
{

        private static Guests guests = new Guests();
    

        public static void loadGuests() {
                for (int i=0; i<9; i++) {
                        Guest guest = new Guest();
                        guests.add(guest);
                }
        }


    public static void printGuests() {
        for (Guest guest : guests) {
            System.out.println(guest);
        }
    }



    public static void main (String[] args)
    {
                        loadGuests();
                        printGuests();   //prints out the guests
			//guests.toString;  //gives no output at all.why?
    }
    
}
thufir@[EMAIL PROTECTED]
 
thufir@[EMAIL PROTECTED]
 cat src/a00720398/data/Guests.java 


package a00720398.data;
import java.util.*;


public class Guests extends ArrayList <Guest>
{

    
}
thufir@[EMAIL PROTECTED]
 
thufir@[EMAIL PROTECTED]
 



thanks,

Thufir