通过它的实例变量的一个对象的排序的ArrayList [英] Sort ArrayList of objects through one of its instance variables

问题描述

Helllo，

我有对象（队）的ArrayList。他们的橄榄球队，我想通过自己的分给他们理清。很显然，我是完全明白的ArrayList通过它们所插入的顺序进行排序。

I have an ArrayList of OBJECTS (teams). They are football teams and I would like to sort them out through their points. Obviously I am fully aware ArrayLists are sorted via the order they are inserted.

但我有一个具有gamesWon，gamesLost，gamesTied和点数基于匹配结果Team类。

But I have a TEAM class that has gamesWon, gamesLost, gamesTied and points based on a match result.

我把一切都准备好，但想通通过它的点整理出一个ArrayList是一个很酷的功能，使

I have everything ready but figured that sorting out an ArrayList through it's points would be a cool feature to make.

我已阅读Collections.sort（myArrayList）网络，而是基于一种类型的变量这一排序，因为我已经在ArrayList中的对象，我想排序了这一点。

I have read the Collections.sort(myArrayList) online, but this sorts based on ONE type of variable, and since I have objects within the ArrayList, I would like to sort this out.

感谢您。

马可波罗

推荐答案

您应该定义的 比较 这一点。

You should define a Comparator for this.

public class PointsBasedTeamComparator implements Comparator<Team> {
    public int compare(Team t1, Team t2) {
        //return the result of points comparison of t1 and t2
    }
}

和按如下方式使用它

Collections.sort(teams, new PointsBasedTeamComparator());

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