Writing the toArray method

Question

This is a question from a quiz of mine from a course from last semester. I am trying to work it to help prepare for an exam.
I am to write the toArray method to add the elements of a list to an array of the exact same size. I am to do this using an iterator.
Here is what I had done. This is suppose to be in a "driver" class.
ListInterface list = new List??Based(); //The type of implementation shouldn't matter
Object[] = toArray(list)
private static Object[] toArray(ListInterface list)
     Iterator iter = list.iterator();
     int size = 0;
     while(iter.hasNext())
          size++;
          iter.next();
     int index = 0;
     Object[] temp = new Object[list.size()];
     while(iter.hasNext())
           array[index] = item.next();
           index++;
}I am open to any constructive criticism. This is as far as I have gotten.

Answer 1

Here is my final code for the proposed problem:
ListInterface list = new List??Based();
Object [] array = toArray(list);
*Returns an Object array containing the exact elements of a given list. <br>
*Preconditions: A list of elements to insert into an array. <br>
*Postconditions: An array of the elements from the given list. The list will not reference the array, therefore the array
* is an independent copy of the elements from the given list. <br>
*Throws: none <br>
private static Object[] toArray(ListInterface list)
     Iterator iter = list.iterator(); //to traverse the list
     Object tempArray = new Object[list.size()]; //creates a new array of the exact same size of the list
     while(iter.hasNext()) //test to make sure we have not reached the end of the list
          int index = 0; //the starting index of the array to add elements
          array[index] = iter.next(); //gets the item and places into the array
          index++; //increments index by 1 to move to next place of insertion in the array
     }// end while
     return tempArray; //returns the new array to the calling method
}// end toArray