Help me debug my error...

Question

i've created a servlet... however, i have some error when compiling it... below is my codes plus the error message...
/**** HelloWorld.java ****/
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloWorld extends HttpServlet {
public void service(HttpServletRequest req,
HttpServletResponse res) throws IOException {
res.setContentType("text/plain");
ServletOutputStream os = res.getOutputStream();
os.write("Hello, world.".getBytes());
os.flush();
public String getServletInfo() {
return "HelloWorld Servlet";
the error message is -
java.lang.NoSuchMethodError: main
Exception in thread "main"
or should i compile the servlet in c prompt???
can someone tell me whats the problem with my codes???
thanks in advance....

Answer 1

This is not the error you got when compiling and you will get it if you try to run this with ,java HelloWorld'.
You cann't run servlets from the command prompt directly.
I saw in your other post that you have Tomcat installed on your PC. You put this HelloWorld.class file in tomcat\webapps\examples\web-inf\classes directory. Any give the URL,
http://localhost:8080/examples/servlet/HelloWorld.
Don't forget to start your tomcat before giving URL in the browser.
Hope this helps.
Sudha