import java.util.*;
/*
Players one and two each try to solve a maze by drawing a path through it; the shorter path 
wins each time.

The GameTracker keeps track of these wins; playAGame() gets passed their paths, and 
uses the StringLengthComparator to pick the shorter one.

But we could use a different Comparator as well; we could specify, for instance, that 
passing through certain cells of the maze earns extra points - in that case, we'd write a 
different Comparator that checks for these special cells.
*/
public class GameTracker<E>
{
        private Comparator<E> comparer;
        private int playerOneWins;
        private int playerTwoWins;
        private int ties;
        public GameTracker(Comparator<E> c)
        {
                comparer = c;
                playerOneWins = 0;
                playerTwoWins = 0;
                ties = 0;
        }
        public void playAGame(E onesPath, E twosPath)
        {
                int result = comparer.compare(onesPath,twosPath);
                if(result < 0) playerOneWins++;
                else if(result > 0) playerTwoWins++;
                else ties++;
        }
        
        public static void main(String[] args)
        {
        	Comparator<String> c=new StringLengthComparator();
        	GameTracker<String> gt=new GameTracker(c);
        	//...
        	//run some games
        }
}