java code for Servlet throws Exceptions

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

public class Thrower extends HttpServlet {

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {

throw new java.io.IOException("IO thrown");
//response.sendError(403);
}

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {

doPost(request, response);
}
}