java convert string array to int array

int[] intArray = convertStringArrayToIntArray(numbers.split(", "));

import java.util.Arrays;
public class StringToIntegerArray {
   public static void main(String args[]) {
      String [] str = {"123", "345", "437", "894"};
      int size = str.length;
      int [] arr = new int [size];
      for(int i=0; i<size; i++) {
         arr[i] = Integer.parseInt(str[i]);
      }
      System.out.println(Arrays.toString(arr));
   }
}

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