//  Times.java  (c) 2005 Kari Laitinen

//  http://www.naturalprogramming.com

//  2004-10-07  File created.
//  2005-03-02  Last modification.

import java.util.* ;

abstract class CurrentTime
{
   protected int current_hours ;
   protected int current_minutes ;
   protected int current_seconds ;

   public CurrentTime()
   {
      Calendar  current_system_time  =  new GregorianCalendar() ;

      current_hours    =  current_system_time.get( Calendar.HOUR_OF_DAY ) ;
      current_minutes  =  current_system_time.get( Calendar.MINUTE ) ;
      current_seconds  =  current_system_time.get( Calendar.SECOND ) ;
   }

   abstract public void print() ;
}

//  It is not entirely true that the 12-hour a.m./p.m. time
//  would be used everywhere in America, and the 24-hour time
//  would be used everywhere in Europe. The names AmericanTime
//  and EuropeanTime just happen to be nice names to
//  distinguish these two different ways to display time.

class  AmericanTime  extends  CurrentTime
{
   public void print()
   {
      int[]  american_hours  =

        { 12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
          12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11  } ;

      System.out.printf( "%d:%02d:%02d", american_hours[ current_hours ],
                         current_minutes, current_seconds ) ;

      if ( current_hours  <  12 )
      {
         System.out.print( " a.m." ) ;
      }
      else
      {
         System.out.print( " p.m." ) ;
      }
   }
}

class  EuropeanTime  extends  CurrentTime
{
   public void print()
   {
      System.out.printf( "%d:%02d:%02d", current_hours,
                         current_minutes, current_seconds ) ;
   }
}

class Times
{
   public static void main( String[] not_in_use )
   {
      Scanner keyboard = new Scanner( System.in ) ;

      CurrentTime  time_to_show ;

      System.out.print( "\n Type 12 to see the time in 12-hour a.m./p.m format."
                     +  "\n Any other number gives the 24-hour format. " ) ;

      int  user_response  =  keyboard.nextInt() ;

      if ( user_response  ==  12 )
      {
         time_to_show  =  new  AmericanTime() ;
      }
      else
      {
         time_to_show  =  new  EuropeanTime() ;
      }

      System.out.print( "\n  The time is now " ) ;

      time_to_show.print() ;

      System.out.print( "\n" ) ;
   }
}