public ReaderCharIterator(Reader in) 
{
        this.reader = in;
}

 public static CharIterator adapt(Reader in) 
{
        return null == in ? null : new ReaderCharIterator(in);
}

 public boolean hasNext() 
{
        ensureNextAvailable();
        return (-1 != next);
}

 public char next() 
{
        if(!hasNext()) {
            throw new NoSuchElementException("No next element");
        } else {
            nextAvailable = false;
            return (char)next;
        }
}

 public  void remove() throws UnsupportedOperationException 
{
        throw new UnsupportedOperationException("remove() is not supported here");
}

Not supported.