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

public class Hello extends GenericServlet {
    public void service(ServletRequest request, ServletResponse response)
            throws ServletException, IOException {
       response.setContentType("text/html");
       final PrintWriter pw = response.getWriter();
       try {
           pw.println("Hello, world!");
       } finally {
           pw.close();
       }
   }
}