List<Integer> to int array java code example

Example 1: java int to int array

int number = 110101; 
String temp = Integer.toString(number);
int[] numbers = new int[temp.length()];
for (int i = 0; i < temp.length(); i++) {
    numbers[i] = temp.charAt(i) - '0';
}

Example 2: convert int array to integer list java

int[] arr = {1,2,3};
IntStream.of(arr).boxed().collect(Collectors.toList());