convert arraylist srting to arraylist int code example

Example 1: convert array of int to arraylist java

int[] ints = {1, 2, 3};
List<Integer> intList = new ArrayList<Integer>(ints.length);
for (int i : ints)
{
    intList.add(i);
}

Example 2: convert arraylist to array int

templist.stream().mapToInt(i->i).toArray();