//  CollectionsMethods.java  (c) 2005 Kari Laitinen

//  http://www.naturalprogramming.com

//  This program demonstrates the methods of the standard
//  class Collections. An ArrayList array is used as a
//  sample collection.

//  2005-05-28  File created.
//  2005-05-28  Last modification.

import java.util.* ;

class CollectionsMethods
{
   static void print_array( ArrayList given_array )
   {
      System.out.print( "\n\n " ) ;

      for ( int element_index  =  0 ;
                element_index  <  given_array.size() ;
                element_index  ++ )
      {
         System.out.printf( "%5s",
                  given_array.get( element_index ).toString() ) ;
      }
   }

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

      array_of_integers.add( 333 ) ;
      array_of_integers.add( 444 ) ;
      array_of_integers.add( 555 ) ;
      array_of_integers.add( 666 ) ;
      array_of_integers.add( 777 ) ;
      array_of_integers.add( 888 ) ;
      array_of_integers.add( 999 ) ;

      print_array( array_of_integers ) ;  
      System.out.print( "  original array" ) ;

      Collections.swap( array_of_integers, 0, 6 ) ;
      print_array( array_of_integers ) ;
      System.out.print( "  after swapping" ) ;

      Collections.sort( array_of_integers ) ;
      print_array( array_of_integers ) ;
      System.out.print( "  after sorting" ) ;

      Collections.reverse( array_of_integers ) ;
      print_array( array_of_integers ) ;
      System.out.print( "  after reversing" ) ;

      Collections.shuffle( array_of_integers ) ;
      print_array( array_of_integers ) ;
      System.out.print( "  after shuffling" ) ;

      Collections.rotate( array_of_integers, 2 ) ;
      print_array( array_of_integers ) ;
      System.out.print( "  after rotating by 2 positions" ) ;

      System.out.print( "\n\n max element:  "
                     +  Collections.max( array_of_integers ) ) ;

      System.out.print( "\n\n min element:  "
                     +  Collections.min( array_of_integers ) ) ;

      Collections.fill( array_of_integers, 111 ) ;
      print_array( array_of_integers ) ;
      System.out.print( "  after filling" ) ;

      //  It is not possible to call addAll() and supply an int[] array
      //  The following statement thus makes an Integer[] array.
      //  Note that addAll() takes a varying number of parameters.

      Integer[]  more_traditional_array  =  { 606, 505 } ;

      Collections.addAll( array_of_integers, 101, 102 ) ;
      Collections.addAll( array_of_integers, more_traditional_array ) ;
      print_array( array_of_integers ) ;
      System.out.print( "  after addAll()" ) ;

   }
}