how to convert array of integers into int 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: how to convert array to int

int i, k = 0;
for (i = 0; i < n; i++)
    k = 10 * k + a[i];