if (prevZip != null) { prevZip.close(); prevZip = null;
if (zipFiles != null) { for (Iterator it = zipFiles.values().iterator(); it.hasNext();) { ((ZipFile)it.next()).close(); }
    public void close()    throws IOException    {        if (prevZip != null) {            prevZip.close();            prevZip = null;        }    }