Add.java

package ex;

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

import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * User: ayato_p
 * Date: 12/21/13
 * Time: 11:05 AM
 */
@WebServlet(urlPatterns = "/")
public class Add extends HttpServlet implements Servlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        int x = Integer.parseInt(request.getParameter("x"));
        int y = Integer.parseInt(request.getParameter("y"));

        int result = x+y;
        response.setContentType("text/html; charset=UTF-8");
        PrintWriter out = response.getWriter();
        out.println("<h1>Result:"+result+"</h1>");
        out.println("<a href=calc.html>back</a>");
        out.close();
    }
}