1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
package design.persistence; import design.model.League; public interface LeagueDatabase { static LeagueDatabase instance() { return JSONLeagueDatabase.instance(); } League getLeague(int id); League[] getLeagues(); void addLeague(League league); void removeLeague(League league); void updateLeague(League league); }