Converting a string array to a large number array

So, in Java I have a large number in the command argument, let's say 12345678910, and I cannot use bigInteger, and I already did:

String[] g = args[1].split("");

So, my string is put in a string array. But, I cannot use:

int[] ginormintOne = new int[g.length];
   for(int n = 0; n < g.length; n++) {
      ginormintOne[n] = Integer.parseInt(g[n]);
   }

It gives me this:

Exception in thread "main" java.lang.NumberFormatException: For input string: ""
    at java.lang.NumberFormatException.forInputString(Unknown Source)
    at java.lang.Integer.parseInt(Unknown Source)
    at java.lang.Integer.parseInt(Unknown Source)
    at Ginormint.main(Ginormint.java:67)

I think my numbers are too large for int. Any idea on how to convert it to a large number array?