First of all, I'm fairly new to Java, so sorry if this question is utterly simple.

The thing is: I have a String[] s made by splitting a String in which every item is a number. I want to cast the items of s into a int[] n.

s[0] contains the number of items that n will hold, effectively s.length-1. I'm trying to do this using a foreach loop:

int[] n;
for(String num: s){
    //if(n is not initialized){
        n = new int[(int) num];
        continue;
    }
    n[n.length] = (int) num;
}

Now, I realize that I could use something like this:

int[] n = new int[(int) s[0]];
for(int i=0; i < s.length; i++){
    n[n.length] = (int) s[i];
}

But I'm sure that I will be faced with that "if n is not initialized initialize it" problem in the future.