//  ArrayListDemoWithIterator.java  (c) 2005 Kari Laitinen

//  http://www.naturalprogramming.com

//  This program works like ArrayListDemo.java.
//  An iterator is used to access the array elements in method
//  print_array().

//  2005-06-06  File created.
//  2005-06-06  Last modification.

import java.util.* ;

class ArrayListDemoWithIterator
{
   static void print_array( ArrayList<Integer> given_array )
   {
      System.out.print( "\n\n " ) ;

      Iterator  element_to_print  =  given_array.iterator() ;

      while ( element_to_print.hasNext() == true )
      {
         System.out.printf( "%5s", element_to_print.next() ) ;
      }


/****
      // The following "foreach" loop can replace the above loop and
      // the iterator.
   
      for ( Object element_in_array : given_array )
      {
         System.out.printf( "%5s",  element_in_array ) ;
      }

*****/
   }

/**

   //  The following is an alternative version of the
   //  print_array() method. Here it is a generic method.

   static <T> void print_array( ArrayList<T> given_array )
   {
      System.out.print( "\n\n " ) ;

      for ( T element_in_array : given_array )
      {
         System.out.printf( "%5s",  element_in_array ) ;
      }

   }

***/

   public static void main( String[] not_in_use )
   {
      ArrayList<Integer> array_of_integers  =  new  ArrayList<Integer>() ;

      array_of_integers.add( 202 ) ;
      array_of_integers.add( 101 ) ;
      array_of_integers.add( 505 ) ;
      array_of_integers.add( 404 ) ;

      System.out.print( "\n Value 404 has index:  "
                  +  array_of_integers.indexOf( 404 )  ) ;
      print_array( array_of_integers ) ;

      array_of_integers.add( 2, 999 ) ;
      array_of_integers.add( 2, 888 ) ;
      print_array( array_of_integers ) ;

      array_of_integers.remove( 4 ) ;
      print_array( array_of_integers ) ;

      array_of_integers.remove( new Integer( 888 ) ) ;
      print_array( array_of_integers ) ;

      ArrayList<Integer> another_array  =   new  ArrayList<Integer>() ;
      another_array.add( 777 ) ;
      another_array.add( 666 ) ;
      print_array( another_array ) ;

      array_of_integers.addAll( another_array ) ;
      print_array( array_of_integers ) ;

      array_of_integers.set( 3, array_of_integers.get( 3 )  +  7 ) ;
      print_array( array_of_integers ) ;
   }
}