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我遇到了一些问题。我使用ArrayList来创建一个足球联盟表。现在我需要做的是使用ClubPoint对ArrayList进行排序。我尝试使用比较器,但不确定要从哪里去。任何帮助表示赞赏使用比较器排序ArrayList
ArrayList<FootballClub> newClub = new ArrayList<FootballClub>();
String format = "|%1$-15s|%2$-15s|%3$-15s|%4$-15s|%5$-15s|%6$-15s|%7$-15s|%8$-15s|%9$-15s|\n";
System.out.format(format, "Score", "Name", "Location", "Wins", "Losses", "Draws",
"Goals Received", "Goals Scored", "Games Played");
for(int x = 0; x < newClub.size(); x++){
Collections.sort(newClub, new DescendingByPointsComparator());
System.out.format(format, newClub.get(x).ClubScore, newClub.get(x).ClubName, newClub.get(x).ClubLocation,
newClub.get(x).ClubWins, newClub.get(x).ClubLosses, newClub.get(x).ClubDraws, newClub.get(x).GoalsReceived,
newClub.get(x).GoalsScored, newClub.get(x).ClubGamesPlayed);
}
class DescendingByPointsComparator implements Comparator<FootballClub> {
@Override
public int compare(FootballClub lhs, FootballClub rhs) {
return Integer.compare(rhs.getPoints(), lhs.getPoints());
}
}
是什么你现在有什么不对? –
我在类DescendingByPointsComparator“Can not Find Symbol:method getPoints()”中得到一个错误 –
然后“FootballClub”的定义似乎是相关的,不是吗? –