Inserting in List of lists using Array.asList in java

Question

I am coding in java and i have three arrays also i have a List of lists.

int[] recovery=bl.generateRecovery();
    int[] periods = bl.generatePeriods(recovery);
    int[] deadlines =  bl.generateDeadlines(periods);

    List<List<Integer>>temp=new ArrayList<List<Integer>>();

Now i want to add the arrays as lists in the list.

I tried using:

temp.add(Arrays.asList(recovery));

But it failed. Can someone tell me how to do it ??

Answer 1

You can make use of Arrays.stream on int[] boxed and collected as List as:

temp.add(Arrays.stream(recovery).boxed().collect(Collectors.toList()));

Answer 2

Arrays.asList(recovery) will give you a List<int[]> object, not List<Integer>. Try using Integer[] recovery instead.

Edit: You might want to have your methods like generateRecovery etc. to return List<Integer> instead of int[]. Arrays are not flexible and it is usually better to use List.