ArrayList To Array conversion 1

import java.util.*;
class ArrayListToArray
{ public static void main(String[] args)
 { ArrayList al=new ArrayList();
  al.add(new Integer(1));
  al.add(new Integer(2));
  al.add(new Integer(3));
  al.add(new Integer(4));
  System.out.println("Contents of al : "+al);
  System.out.println("Contents of al using iterator:");
  Iterator itr = al.iterator();
  while(itr.hasNext())
  {
   int x = (Integer)itr.next();
   System.out.print(x + " ");
  }
  System.out.println();
  Object ia[]= al.toArray();
  int sum=0;
  for(int i=0; i < ia.length; i++)
   sum = sum + (Integer)ia[i];
  System.out.println("Sum is "+sum);
 }
}