title: how do i solve the double method while string in java with servlet
body: <pre><code>package com.dev.web.Controller;
  
  import java.io.IOException;
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import javax.servlet.RequestDispatcher;
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import com.dev.web.Dao.UserDao;
  import com.dev.web.Model.User;
  
  public class UserControll extends HttpServlet
  {
      private static final long serialVersionUID = 1L;
      private static String INSERT_OR_EDIT = "/user.jsp";
      private static String LIST_USER = "/listEmp.jsp";
      private UserDao dao;
  
      public UserControll() {
          super();
        UserDao dao = new UserDao();
      }
  
      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          String forward="";
          String action = request.getParameter("action");
  
          if (action.equalsIgnoreCase("delete")){
              int Employee_Id= Integer.parseInt(request.getParameter("Employee_Id"));
              dao.deleteUser(Employee_Id);
              forward = LIST_USER;
              request.setAttribute("users", dao.getAllUsers());    
          } else if (action.equalsIgnoreCase("edit")){
              forward = INSERT_OR_EDIT;
              int Employee_Id = Integer.parseInt(request.getParameter("empId"));
              User user = dao.getUserById(Employee_Id);
              request.setAttribute("user", user);
          } else if (action.equalsIgnoreCase("listUser")){
              forward = LIST_USER;
              request.setAttribute("Employee", dao.getAllUsers());
          } else {
              forward = INSERT_OR_EDIT;
          }
  
          RequestDispatcher view = request.getRequestDispatcher(forward);
          view.forward(request, response);
      }
  
      protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          User user = new User();
          user.setEmployee_Name(request.getParameter("empname"));
          user.setSalary(request.getParameter("empsalary"));// here is my error..i declared salary is double
          try {
              Date dob = new SimpleDateFormat("MM/dd/yyyy").parse(request.getParameter("empdob"));
              user.setDob(dob);
          } catch (ParseException e) {
              e.printStackTrace();
          }
          user.setActive(request.getParameter("empactive"));// here is my error.. i declared active is boolean
          String empid = request.getParameter("empid");
          if(empid == null || empid.isEmpty())
          {
              dao.addUser(user);
          }
          else
          {
              user.setEmployee_ID(Integer.par`enter code here`seInt(empid));
              dao.updateUser(user);
          }
          RequestDispatcher view = request.getRequestDispatcher(LIST_USER);
          request.setAttribute("users", dao.getAllUsers());
          view.forward(request, response);
      }
  }
  </code></pre>