Method codePointAt

lib/java/lang/AbstractStringBuilder.java:809–814

Retrieves the Unicode code point value at the index. @param index the index to the char code unit. @return the Unicode code point value. @throws IndexOutOfBoundsException if index is negative or greater than or equal to #length(). @

(int index)

     * @since 1.5
     */
    public int codePointAt(int index) {
        if (index < 0 || index >= count) {
            throw new StringIndexOutOfBoundsException(index);
        }
        return Character.codePointAt(value, index, count);
    }

    /**
     * Retrieves the Unicode code point value that precedes the {@code index}.