java int list to array code example

Example 1: list to int array in java 8

int[] array = list.stream().mapToInt(i->i).toArray();

Example 2: convert list of integer to array in java

List<Integer> al = new ArrayList<Integer>(); 
Integer[] arr = new Integer[al.size()]; 
arr = al.toArray(arr);

Example 3: 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 4: convert arraylist to array int

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