Creating the Class Declaration

To create a servlet, write a public Java class that includes basic I/O support as well as the package javax.servlet. The class must extend either GenericServlet or HttpServlet. Because Sun Java System Web Server 7.0 servlets exist in an HTTP environment, the latter class is recommended. If the servlet is part of a package, you must also declare the package name so the class loader can properly locate it.

The following example header shows the HTTP servlet declaration called MyServlet:

import java.io.*;
     import javax.servlet.*;
     import javax.servlet.http.*;

     public class myServlet extends HttpServlet {
        ...servlet methods...
     }