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up vote 0 down vote favorite

So in my program I split the first row of data imported by a csv file into an array. Is there anyway that I can add this array into an array list as the first element? Because once I split the second data into an array by a delimiter I then want to store this array in the same arraylist but in element 2. A bit confusing but to summarize is nested arrays in an arraylist possible?

public static ArrayList<String[]> readCSV(Scanner csv, String delimiter, int minCellsPerRow) {
  String line = csv.nextLine();
  String[] parts = line.split(delimiter);
  List<String> list = new ArrayList<String>();
  list.add(parts);
}
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list.add(list.size(), parts) –  Muhammad Tauseef Mar 18 at 1:19
    
tag this post as Java, and syntax highlighting turns on :). –  justinmreina Mar 18 at 1:38

1 Answer 1

up vote 1 down vote accepted

you can specify insertion index with list.add()... here is an example:

public static void main(String[] args) {

    //setup
    ArrayList<String> storage;

    storage = new ArrayList<String>(Arrays.asList("4","5","6"));

    String[] data = {"1","2","3"};

    printMe(storage);

    //append
    storage.addAll(0, Arrays.asList(data));

    printMe(storage);
}

public static void printMe(ArrayList<String> strs) {
    System.out.println(Arrays.toString(strs.toArray(new String[0])));
}

yields the console result:

[4, 5, 6]
[1, 2, 3, 4, 5, 6]

would this work in your case?

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