ASCII value in Java and how to store in array of size 128 or 256?

ASCII value

ASCII represents a numeric value for each character, like 65 is a value of A. ASCII is a 7-bit character set having 128 characters, i.e., from 0 to 127.

Storing in integer array of size 128

int[] array = new int[128];
for(int i=0; i<s.length();i++){
    array[s.charAt(i)] = i+1;
  }

Using string.charAt() method, we can store each character’s ASCII value in an integer array like so.