Java Comparator排序

Collections.sort(arrs, new RankComparator());class RankComparator implements Comparator<LeagueVo>{    @override    public int compare(LeagueVo arg0, LeagueVo arg1){        if(arg0.getLv() == arg1.getLv()){            if(arg1.getFightVal() == arg0.getFightVal()){                return arg0.getCreateTime() - arg1.getCreatTime();            }            return arg1.getFightVal() - arg0.getFightVal();        }        return arg1.getLv() - arg0.getLv();    }}