HTML ,JSP,JAVA

package servlet; 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 ChangePassword extends HttpServlet { private static final long serialVersionUID = 1L; public ChangePassword() { super(); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException { PrintWriter out = resp.getWriter(); String pass = req.getParameter("passwordEntered"); if (!Login.isLoggedIn){ out.println("You must login first"); } else if (pass.equals("")){ out.println("Password can't be empty"); } else if (Login.isLoggedIn && !pass.equals("")){ Login.password = pass; out.println("Password changed. New Password is "+Login.password); } else { out.println("Sorry, Something went wrong"); } out.close(); } }