gistfile1.java

//// Two player example
TrueskillCalc trueskillCalc = new TrueskillCalc();

// or, to use non-default gameInfo

TrueskillCalc trueskillCalc = new TrueskillCalc(GameInfo gameInfo);

Rating playerRating1 = trueskillCalc.newDefaultRating();

or

Rating playerRating2 = new Rating(mean, stdDev);

// player1 wins, player2 comes second
trueskillCalc.updateRatings(playerRating1, 1, playerRating2, 2);

// Note, there are multiple overloaded implementations of TrueskillCalc.updateRatings()
// In this case, we use updateRatings(Player a, int aResult, Player b, bResult) - and
// this contains code specific to a one-on-one game (like TwoPlayerTrueSkillCalculator)

// Note also that the Ratings are updated in-place.  This is more efficient and probably
// in-keeping with the most common use-cases.  Rating should implement a clone()
// method, so that they can be copied before giving them to updateRatings() if the
// caller needs to keep the original around.

//// Two teams with 2 players in the first team, and 3 players in the second

// Team implements the List<Rating> interface

Team team1 = Team.create(playerRating1, playerRating2);
Team team2 = Team.create(playerRating3, playerRating4, playerRating5);

trueskillCalc.updateRatings(team1, 1, team2, 2);

//// What about multiple players?  We use a map

// ("Maps" is a utility class provided by Google's guava-libraries)
// Here, player1 wins, and player2 and player3 tie for second place
Map<Rating, Integer> gameResults = Maps.newHashMap();
Rating playerRating1 = ...
gameResults.put(playerRating1, 1);
Rating playerRating2 = ...
gameResults.put(playerRating2, 2);
Rating playerRating3 = ...
gameResults.put(playerRating3, 2);

trueskillCalc.updateRatings(gameResults);

// HOWEVER, we can't use another overloaded implementation of our updateRatings() to do the 
// same with teams because of a limitation of Java's generics, so we do this:

Map<Team, Integer> gameResults = Maps.newHashMap();
// .. create the teams and add them to gameResults

trueskillCalc.updateTeamRatings(gameResults);