Could not find the main class. Program will exit.

I am using eclipse. Followed is the code that I use, I get the error
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Java Virtual Machine Launcher
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Could not find the main class. Program will exit.
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OK  
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when I run it, what is the problem?

package myFolder;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class myClass extends HttpServlet {

      protected void doGet(HttpServletRequest request, HttpServletResponse response)
                  throws ServletException, IOException {
            response.setContentType("text/html");
            PrintWriter out=response.getWriter();
            out.println("reponse as HTML");
      }
      protected void doPost(HttpServletRequest request, HttpServletResponse response)
                  throws ServletException, IOException {
            // TODO Auto-generated method stub
            doGet(request,response);
      }
public static void main(String args[]){}




}