Method charAt

lib/java/lang/CharSequence.java:45–45

Returns the character at the specified index, with the first character having index zero. @param index the index of the character to return. @return the requested character. @throws IndexOutOfBoundsException if index < 0 or index is greater than the

(int index)

     *             length of this sequence.
     */
    public char charAt(int index);

    /**
     * Returns a {@code CharSequence} from the {@code start} index (inclusive)