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();
}
}