Array access with char index in Java

Question

While seeing the explanation for a Java programming exercise online, I came upon the following piece of code:

int[] count = new int[128];
int length = 0;
for(char c: s.toCharArray()){
    if(++count[c] == 2){
        length += 2;
        count[c] = 0;
    }
}

I understand what the code does but I don't know how it can access an array element using a char index (i.e.count[c], where c is a char). I thought indexes could only be integers?

Answer 1

The char is implicitly cast to an int. The index is still an int.