java - Android:HashMap 按 3 个值排序

Question

我想对一些数据进行排序。目前数据存储在 map 中。我知道，我无法按值对 map 中的数据进行排序。我这样计算足球赛程:

TeamName, G+, G-, P

我想先按 P 排序，然后按 G+ 排序，然后按 G- 排序。

每个 k,v 都在这样的 map 中:

map.put(e.getString("team_id"), 0);    
map.put(e.getString("team_id")+"G+", 0);
map.put(e.getString("team_id")+"G-", 0);

我知道数据结构实在是太糟糕了!我认为最好将值放入 Collection 中以执行 collection.sort。但我怎样才能做到这一点呢？

这是我的代码(代码工作正常，但未排序且编码错误):

HashMap<String, Integer> map = new HashMap<String, Integer>();
HashMap<String, String> tab = new HashMap<String, String>();

for(int i=0; i<teams.length(); i++){                
    JSONObject e = teams.getJSONObject(i);
    //get TeamID
    map.put(e.getString("team_id"), 0);
    //Goals +
    map.put(e.getString("team_id")+"G+", 0);
    //Goals -
    map.put(e.getString("team_id")+"G-", 0);
    //standings.add(map);
    //Log.e("Team7", String.valueOf(map.get("7")));
    //Log.e("Team7", e.getString("team_id"));
}

for(int i=0; i<matchdata.length(); i++){
    JSONObject e = matchdata.getJSONObject(i);
    //calculate Points
    int myVarGoal1 = Integer.valueOf(e.getString("points_team1"));
    int myVarGoal2 = Integer.valueOf(e.getString("points_team2"));
    if ((myVarGoal1) > (myVarGoal2)){
        myPoint1 = 3;
        myPoint2 = 0;
    }
    if ((myVarGoal1) < (myVarGoal2)){
        myPoint1 = 0;
        myPoint2 = 3;
    }
    if ((myVarGoal1) == (myVarGoal2)){
        myPoint1 = 1;
        myPoint2 = 1;
    }
    int calc1 = (map.get(e.getString("id_team1")) + myPoint1);
    int calc2 = (map.get(e.getString("id_team2")) + myPoint2);
    map.put("id",  Integer.valueOf(i));
    map.put(e.getString("id_team1"), calc1);
    map.put(e.getString("id_team2"), calc2);

    //calculate Goals
    int calcGoal1 = (map.get(e.getString("id_team1")+"G+") + myVarGoal1);
    int calcGoal2 = (map.get(e.getString("id_team1")+"G-") + myVarGoal2);
    int calcGoal3 = (map.get(e.getString("id_team2")+"G+") + myVarGoal2);
    int calcGoal4 = (map.get(e.getString("id_team2")+"G-") + myVarGoal1);
    map.put(e.getString("id_team1")+"G+", calcGoal1);
    map.put(e.getString("id_team1")+"G-", calcGoal2);
    map.put(e.getString("id_team2")+"G+", calcGoal3);
    map.put(e.getString("id_team2")+"G-", calcGoal4);
    //standings.add(map);
    //Log.e("TeamID", e.getString("id_team1"));
    //Log.e("PointsTeam7", String.valueOf(map.get("7")));
    //Log.e("GaolsTeam7", String.valueOf(map.get("7G-")));
}

for(int i=0; i<teams.length(); i++){                
    JSONObject e = teams.getJSONObject(i);
    String myTeamID = e.getString("team_id");
    int Gdif = (map.get(myTeamID+"G+")) - (map.get(myTeamID+"G-"));
    tab.put(myTeamID, e.getString("team_name") +","+ map.get(myTeamID) +","+ (map.get(myTeamID+"G+")) +":"+ (map.get(myTeamID+"G-")) +" "+ Gdif);
    //Log.e("Team7", String.valueOf(tab.get("7")));
    //Log.e("Team7", e.getString("team_id"));
    strGoals+="\n" + String.valueOf(tab.get(myTeamID));
}

Answer 1

听起来您需要首先创建自己的类来将相关数据保存为一个对象。类的确切名称取决于数据是什么。也许是 SoccerTeam 或 SoccerSchedule。创建此类后，您可以实现 Comparable 接口(interface)或创建定义排序顺序的 Comparator 对象。