Servlet Test Runner

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

public class HelloWorldServlet extends GenericServlet { 
   static String initName;
   static String initAge;

   public void init(ServletConfig sc) throws ServletException {
      super.init(sc);
      initName=sc.getInitParameter("name");
      initAge=sc.getInitParameter("age");
   },

   public void service(ServletRequest req, ServletResponse res)
   throws ServletException, IOException {
      PrintWriter toClient=res.getWriter();
      String name=req.getParameter("name");
      String age=req.getParameter("age");
      toClient.println("Welcome to HelloWorldServlet.");
      toClient.println("Your name is "+(name!=null ? name : initName));
      toClient.println("You're "+(age!=null ? age : initAge)+"years old");
      toClient.close();
   },
},