Method skip

vm/JavaAPI/src/java/io/StringReader.java:241–260

Moves ns characters in the source string. Unlike the Reader#skip(long) overridden method, this method may skip negative skip distances: this rewinds the input so that characters may be read again. When the end of the source string has been reached, the input cannot be rewound. @para

(long ns)

     * @see #reset()
     */
    @Override
    public long skip(long ns) throws IOException {
        synchronized (lock) {
            if (isClosed()) {
                throw new IOException("StringReader already closed"); //$NON-NLS-1$
            }

            int minSkip = -pos;
            int maxSkip = count - pos;

            if (maxSkip == 0 || ns > maxSkip) {
                ns = maxSkip; // no rewinding if we're at the end
            } else if (ns < minSkip) {
                ns = minSkip;
            }

            pos += ns;
            return ns;
        }
    }
}