Help me with my code plz

Question

I work on a servlet that connects to Access using JDBC -ODBC bridge
but it doesn't retrieve anything.So cud u plz help me?
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.sql.*;
public class first_count extends HttpServlet {
   private Statement statement = null;
   private Connection connection = null;
   private String URL = "jdbc:odbc:rjdemo";
   public void init( ServletConfig config )
      throws ServletException
      super.init( config );
      try {
  Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
      connection =DriverManager.getConnection( URL, "", "" );
        }//try
       catch ( Exception e )
         e.printStackTrace();
         connection = null;
      }//catch
   public void doPost( HttpServletRequest req,
                       HttpServletResponse res )
      throws ServletException, IOException
      String cnt;
      cnt = req.getParameter( "big" );
//takes the parameter of a radio button in a form
     PrintWriter out = res.getWriter();
      res.setContentType( "text/html" );
     if ( cnt.equals("big1"))
//if the value of the radio button equals big1
         int i=0;
         out.println("The number retrieved = " + big_counter(i));
                  }//if
        out.close();
int big_counter(int i)
      try {
         i=0;
         statement = connection.createStatement();
         ResultSet r= statement.executeQuery("select beg_count from User");
         r.first();
         i=r.getInt("beg_count");
//the name of column is beg_count it's a number
         i++;
         statement.executeUpdate("UPDATE User SET beg_count="+i);
         statement.close();
      }//try
      catch ( Exception e )
      }//catch
return i;
   public void destroy()
      try {
         connection.close();
      catch( Exception e ) {
}

Answer 1

JSWDK WebServer Version 1.0.1
Loaded configuration from: file:C:\Program Files\java\jswdk-1.0.1\webserver.xml
endpoint created: localhost/127.0.0.1:8080
com.sun.web.core.InvokerServlet: init
first_count: init
java.sql.SQLException: Result set type is TYPE_FORWARD_ONLY
at sun.jdbc.odbc.JdbcOdbcResultSet.first(Unknown Source)
at first_count.big_counter(first_count.java:98)
at first_count.doPost(first_count.java:45)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:747)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:840)
at com.sun.web.core.ServletWrapper.handleRequest(ServletWrapper.java:155
at com.sun.web.core.InvokerServlet.service(InvokerServlet.java:168)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:840)
at com.sun.web.core.ServletWrapper.handleRequest(ServletWrapper.java:155
at com.sun.web.core.Context.handleRequest(Context.java:414)
at com.sun.web.server.ConnectionHandler.run(ConnectionHandler.java:139)
HANDLER THREAD PROBLEM: java.net.SocketException: Socket is closed
java.net.SocketException: Socket is closed
at java.net.Socket.getInputStream(Unknown Source)
at com.sun.web.server.ConnectionHandler.run(ConnectionHandler.java:161)