need help

[柳建全]

I have a ergent problem.   In my servlet I new a class to parse the xml file. But I found that a unknown exception thrown at the sentence of new. it's ok when I test the servlet using main(). I am very confused of it.   here is the code.     public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        xmlParser xp=null;      response.setContentType("text/html");      out = new PrintWriter (response.getOutputStream());      try{        forlog=new logFile("newsfeeds.log");        forlog.WriteLog(true,true,"doPost");        NewsType=request.getParameter ("feedname");        NewsURL=request.getParameter("xmldata");        forlog.WriteLog (logFile.INPUT_LOG,NewsType);        forlog.WriteLog (logFile.INPUT_LOG,NewsURL);        forlog.EndLog();        if(NewsType.equals("englishNews"))      //   THE PLACE EXCEPTIN THROWN          xp=new xmlParser(xmlParser.NewsFeed,NewsURL);        else if(NewsType.equals("englishGoalFlash"))          xp=new xmlParser(xmlParser.MatchFeed,NewsURL);        else if(NewsType.equals("englishMatchDetails"))          xp=new xmlParser(xmlParser.MatchDetail,NewsURL);        else postStr(true);        sbis=new StringBufferInputStream(NewsURL);        if((Node=xp.startParse (sbis))==null)          postStr(false);      }      catch(Exception e)      {         forlog.WriteLog(e);      }   }   The class to parse the xml is below public class xmlParser extends DefaultHandler {     public xmlParser(int Nodetype,String surl)     {       Nodetype=type;     } .......   I have no idea what happened. Someone can help me?   thank you very much. I am anxiously waiting for your suggestion.