how to make a string a number in an array code example

Example 1: how to convert string to int a array in javascript

var a = "1,2,3,4";

var b = a.split(',').map(function(item) {
    return parseInt(item, 10);
});

Example 2: java convert string to int array

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));
   }
}