lab5/Tournament.java

   1 /*
   2  * Tournament.java
   3  *
   4  * Version:
   5  *     $Id: Tournament.java,v 1.1 2006/01/20 21:32:33 vcss232 Exp $
   6  *
   7  * Revisions:
   8  *     $Log: Tournament.java,v $
   9  *     Revision 1.1  2006/01/20 21:32:33  vcss232
  10  *     Initial revision
  11  *
  12  *     Revision 1.3  2005/01/12 13:27:40  vcss232
  13  *     revised constant comment
  14  *
  15  *     Revision 1.2  2005/01/12 13:17:26  vcss232
  16  *     corrected comments; switched constant from private to public
  17  *
  18  *     Revision 1.1  2005/01/11 18:38:26  vcss232
  19  *     Initial revision
  20  *
  21  *
  22  */
  23
  24 import java.io.*;
  25
  26 /**
  27  * This class provides a simple test program that takes one command line
  28  * argument representing the number of teams in a league.  If the program
  29  * confirms that the number of teams is greater than 2 and less than or
  30  * equal to the maximum allowed and also that the number of teams is a
  31  * power of 2, then it invokes a TournamentMaker object and generates the
  32  * match-ups for the first round in a round-robin style tournament;
  33  * otherwise, an error message is printed on standard error and the
  34  * program terminates.
  35  *
  36  * @author    Hank Etlinger
  37  */
  38
  39 public class Tournament {
  40
  41     /**
  42      * maximum number of teams permitted in a tournament; currently
  43      * set to 64
  44      */
  45     public static final int MAX_TEAMS = 64;
  46
  47     /**
  48      * actual number of teams entered in this tournament
  49      */
  50     private static int numberOfTeams;
  51
  52     /**
  53      * The main program.
  54      *
  55      * @param           args            command line arguments
  56      *
  57      * @exception       IOException     may have propagated back from
  58      *                                  TournamentMaker
  59      */
  60     public static void main(String[] args ) throws IOException {
  61
  62         numberOfTeams = Integer.parseInt( args[ 0 ] );
  63         if ( numberOfTeams < MAX_TEAMS && ( numberOfTeams ==   4 ||
  64                                             numberOfTeams ==   8 ||
  65                                             numberOfTeams ==  16 ||
  66                                             numberOfTeams ==  32 ||
  67                                             numberOfTeams ==  64 ) ) {
  68             TournamentMaker tournament = new TournamentMaker();
  69             tournament.make( numberOfTeams );
  70         } else {
  71             System.err.print( "Number of teams must be > 2 and <= " + MAX_TEAMS );
  72             System.err.println( " and be a power of 2." );
  73         }
  74     }
  75 }