AbstractMethodError

Hi, I have written the following servlet:

Code:

---

package com.nitish.servlets;
import javax.servlet.*;
import java.io.*;
import java.sql.*;
import javax.sql.*;
import oracle.sql.*;

public class RequestServlet extends GenericServlet{
        public void init(ServletConfig sc)throws ServletException{
                try{
                        Class.forName("oracle.jdbc.driver.OracleDriver");
                }//try
                catch(Exception e){
                        throw new ServletException("Unable to load the driver");
                }//catch
        }//init
        public void service(ServletRequest req,ServletResponse res)throws ServletException,IOException{
                String name=req.getParameter("name");
                String college=req.getParameter("college");
                String university=req.getParameter("university");
                String contactno=req.getParameter("contactno");
                String[] course=req.getParameterValues("Course");
                String photo=req.getParameter("photo");
                byte []b=photo.getBytes();
                //ByteArrayInputStream bis=new ByteArrayInputStream(b);
                Blob b1=new SerialBlob(b);
                PrintWriter out =res.getWriter();
                Connection con=null;
                PreparedStatement ps=null;
        try{
                        con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","system","nitish");
                        ps=con.prepareStatement("insert into stenquiry values(?,?,?,?,?)");
                        ps.setString(1,name);
                        ps.setString(2,college);
                        ps.setString(3,university);
                        ps.setString(4,contactno);
                        ArrayDescriptor ad=ArrayDescriptor.createDescriptor("COURSEARRAY",con);
                        ARRAY a=new ARRAY(ad,con,course);
                        ps.setArray(5,a);
                        ps.setBlob(6,b1);
                        //ps.setBlob(6,bis);
                        ps.executeUpdate();
                        out.println("Records Inserted Successfully");
                }//try
                catch(Exception e){}
                finally{
                        try{
                                ps.close();
                                con.close();
                        }//try
                        catch(Exception e){
                                e.printStackTrace();
                        }//catch
                }//finally
        }//service
}//class

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The problem I am facing is when I tried to compile the code, it gave me error saying that cannot find symbol:SerialBlob(); , while I have set the classpath for ojdbc14.jar prior to compilation.

And instead of using blob object in setBlob(), I also tried to use input stream. It compiled successfully, but when I executed the program, it gave me error as follows:

java.lang.AbstractMethodError: oracle.jdbc.driver.T4CPreparedStatement.setBlob(IL java/io/InputStream;)V
com.stech.servlets.RequestServlet.service(RequestS ervlet.java:40)
I am not getting why is this happening.

You haven't imported SerialBlob.
Don't rely on using '*' to pick everything up. It's lazy.
It also doesn't pick up sub-packages.

Anyway, it should work with the InputStream.
Show us the code for using the InputStream.