按Java中的姓氏和名字对对象的ArrayList进行排序

问题描述

我有一个基于体育的不同类型球员的阵列列表。我需要按照姓氏对arrayList中的玩家列表进行排序才能开始。如果2个玩家具有相同的姓氏，则需要按照名字对这2个玩家进行排序。
示例：格式姓氏名字
Williams Robert
Phillips Warren
Doe John
Phillips Mark

I have an arrayList of different types of players based on sports. I need to sort the list of players in the arrayList by last name to start. If 2 players have the same last name it needs to then sort those 2 players by the first name.example: Format Lastname firstnameWilliams RobertPhillips WarrenDoe JohnPhillips Mark

输出应该是
Doe John
Phillips Mark
Phillips Warren
Williams Robert

Output should be Doe JohnPhillips MarkPhillips WarrenWilliams Robert

我现在只有第一个或者最后我在我的代码中使用最后一个atm。

What i have now only sorts by either the first or last i have it by last atm in my code.

   public static void sortPlayers(ArrayList playerList) {
    for (int i = 0; i < playerList.size(); i++) {
        for (int j = 0; j < playerList.size(); j++) {
            Collections.sort(playerList, new Comparator() {

                public int compare(Object o1, Object o2) {
                    PlayerStats p1 = (PlayerStats) o1;
                    PlayerStats p2 = (PlayerStats) o2;
                    return p1.getPlayerLastName().compareToIgnoreCase(p2.getPlayerLastName());
                }
            });
        }

    }
}

推荐答案

将比较器更改为：

            public int compare(Object o1, Object o2) {
                PlayerStats p1 = (PlayerStats) o1;
                PlayerStats p2 = (PlayerStats) o2;
                int res =  p1.getPlayerLastName().compareToIgnoreCase(p2.getPlayerLastName());
                if (res != 0)
                    return res;
                return p1.getPlayerFirstName().compareToIgnoreCase(p2.getPlayerFirstName())
            }

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