Fixing "getDataFromCSV" to return correct data type

data2.csv

+1, 2, 3
+1, 2, 3, 4
\ No newline at end of file

src/GetDataFromCSV.java

@@ -8,21 +8,21 @@ import java.util.Scanner;
 public class GetDataFromCSV {
     private String nFileLocation = "data.csv";
 
-    public ArrayList getDataFromCSV() throws FileNotFoundException {
+    public List<ArrayList<Double>> getDataFromCSV() throws FileNotFoundException {
         List<ArrayList<Double>> nListOfValues = new ArrayList<>();
         Scanner scanner = new Scanner(new BufferedReader(new FileReader(nFileLocation)));
-        while (scanner.hasNextLine()){
+        while (scanner.hasNextLine()) {
             String nLine = scanner.nextLine();
             String[] inArray = nLine.split(",");
             ArrayList<Double> list = new ArrayList<>();
             for (String anInArray : inArray) {
                 list.add(Double.parseDouble(anInArray));
             }
-            if(list.size() != 0){
+            if (list.size() != 0) {
                 nListOfValues.add(list);
             }
         }
-    return (ArrayList) nListOfValues;
+        return nListOfValues;
     }
 
     public void setnFileLocation(String nFileLocation) {

src/Main.java

@@ -4,7 +4,8 @@ import java.util.Arrays;
 public class Main {
     public static void main(String[] args) throws FileNotFoundException {
         GetDataFromCSV get = new GetDataFromCSV();
+        get.setnFileLocation("data2.csv");
         for (int i = 0 ; i < get.getDataFromCSV().size();i++)
-        System.out.println(get.getDataFromCSV().get(i));
+        System.out.println(get.getDataFromCSV().get(i).size());
     }
 }