在一个循环或两个单循环中在哈希图的哈希图中输入数据

Question

我有以下类型的列表：RepoID，Userid，事件计数（8种类型）

例子：

Repoid1, user1,8,1,0,2,3,4,5,9

Repoid1, user2,5,6,0,0,0,4,5,9

Repoid2, user1,5,0,5,2,3,4,5,1

Repoid3, user4,0,6,9,2,3,4,5,2

对于每个回购，我想查找用户的每种事件类型的计数。我正在使用hashmap的hashmap，但是由于文件太大，我不想使用2个循环。有没有办法在单个循环中执行此操作或使用2个单个循环？

我目前正在使用2个循环：

for (int i = 0; i < data.size(); i++) { //data is an arraylist

    String[] seq = data.get(i).split(",");

    String repo=seq[0];

    for (int j = 0; j < data.size(); j++) {

        seq = data.get(j).split(",");

        if(seq[0].equals(repo)){

            usermap.put(seq[1],"seq[2] + "," + seq[3] + "," + seq[4] + "," + seq[5] + 

                "," + seq[6]    + "," + seq[7] + "," + seq[8] + "," + seq[9]");

        } 

    }

    RepoUserMap.put(repo, EventsMap);

}