Thread: connection failed while connecting to OpenOffice .org

File file = new File((new StringBuilder()).append(s2).append(File.separator) .append(s1).toString());
file.renameTo(new File((new StringBuilder()).append(s2).append(File.separator) .append("$$tsjoof$$.xls").toString()));
// SocketOpenOfficeConnection socketopenofficeconnection = new SocketOpenOfficeConnection();
OpenOfficeConnection socketopenofficeconnection = new SocketOpenOfficeConnection(8100);

try
{
String s3 = (new StringBuilder()).append(s2).append(File.separator) .append("$$tsjoof$$.xls").append(".ods").toString( );
DefaultDocumentFormatRegistry defaultdocumentformatregistry = new DefaultDocumentFormatRegistry();
File file4 = new File((new StringBuilder()).append(s2).append(File.separator) .append("$$tsjoof$$.xls").toString());
File file6 = new File(s3);
socketopenofficeconnection.connect();
if(socketopenofficeconnection.isConnected())
{
OpenOfficeDocumentConverter openofficedocumentconverter = new OpenOfficeDocumentConverter(socketopenofficeconnec tion);
openofficedocumentconverter.convert(file4, defaultdocumentformatregistry.getFormatByFileExten sion("xls"), file6, defaultdocumentformatregistry.getFormatByFileExten sion("ods"));
} else
{
File file7 = new File((new StringBuilder()).append(s2).append(File.separator) .append("$$tsjoof$$.xls").toString());
file7.renameTo(new File((new StringBuilder()).append(s2).append(File.separator) .append(s1).toString()));
throw new OpenOfficeConnectException("Unable to connect to OpenOffice.org to convert Excel Document.");
}
}
It is giving an exception as

connection failed: socket,host=localhost,port=1234,tcpNoDelay=1: java.net.ConnectException: Connection refused: connect Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at com.artofsolving.jodconverter.openoffice.connectio n.AbstractOpenOfficeConnection.disconnect(Abstract OpenOfficeConnection.java:88) at fileToXliff.ExcelImporter.convert(ExcelImporter.ja va:90) at fileToXliff.MainGui.jbtnConvertActionPerformed(Mai nGui.java:667) at fileToXliff.MainGui.access$800(MainGui.java:55) at fileToXliff.MainGui$9.actionPerformed(MainGui.java :179) What should I need to do .

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