Method codePointCount

lib/java/lang/String.java:1899–1905

Calculates the number of Unicode code points between beginIndex and endIndex. @param beginIndex the inclusive beginning index of the subsequence. @param endIndex the exclusive end index of the subsequence. @return the number of Unicode code points in the subseq

(int beginIndex, int endIndex)

     * @since 1.5
     */
    public int codePointCount(int beginIndex, int endIndex) {
        if (beginIndex < 0 || endIndex > count || beginIndex > endIndex) {
            throw new IndexOutOfBoundsException();
        }
        int s = beginIndex + offset;
        return Character.codePointCount(value, s, endIndex - beginIndex);
    }

    /**
     * Determines if this {@code String} contains the sequence of characters in