Method charAt

lib/java/util/Arrays.java:2661–2666

(String str, int i)

     * index more than the length of this string.
     */
    private static int charAt(String str, int i) {
        if (i >= str.length()) {
            return -1;
        }
        return str.charAt(i);
    }

    /**
     * Copies object from one array to another array with reverse of objects