Answers for "int array to arraylist java 8"

integer arraylist to int array

//only works in java 8 or later
list.stream().mapToInt(i -> i).toArray();

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);
}

convert arraylist to array int

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

convert Integer arraylist to array java

Your_ArrayList_Name.stream().mapToInt(k->k).toArray();

convert arraylist of integers to array primitive

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