java - Why am I getting "Duplicate local variable error" here? -

i have code trying send email using java mail api. when running code in eclipse, getting error "multiple annotations found @ line:duplicate local variable session". have declared session variable once why getting error?

try{      string host="smtp.gmail.com";     string to="abc@gmail.com";      final string user="xyz@gmail.com";       final string password="*********";      properties properties = system.getproperties();       properties.setproperty("mail.smtp.host",host );       properties.put("mail.smtp.auth", "true");        session session = session.getdefaultinstance(properties,       new javax.mail.authenticator() {       protected passwordauthentication getpasswordauthentication() {       return new passwordauthentication(user,password);       }       });       mimemessage message = new mimemessage(session);       message.setfrom(new internetaddress(user));       message.addrecipient(message.recipienttype.to,                                new internetaddress(to));       message.setsubject("thank subscriber");      message.setcontent("<table><tr><td>name</td><td>+name+</td></tr><tr><td>address</td><td>+addr+</td></tr><tr><td>age</td><td>+age+</td></tr><tr><td>qualification</td><td>+qual+</td></tr><tr><td>percentage</td><td>+persent+</td></tr><tr><td>passout</td><td>+year+</td></tr></table>","text/html");    transport.send(message);       system.out.println("message sent....");    } catch (messagingexception ex) {ex.printstacktrace();}   {} 

this servlet using.

package com.registration;  import java.io.ioexception; import java.io.printwriter;  import javax.servlet.requestdispatcher; import javax.servlet.servletexception; import javax.servlet.http.httpservlet; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse;  /**  * servlet implementation class registrationcontroller  */ public class registrationcontroller extends httpservlet {     private static final long serialversionuid = 1l;      /**      * @see httpservlet#httpservlet()      */     public registrationcontroller() {         super();         // todo auto-generated constructor stub     }      /**      * @see httpservlet#doget(httpservletrequest request, httpservletresponse response)      */     protected void doget(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {         // todo auto-generated method stub     }      /**      * @see httpservlet#dopost(httpservletrequest request, httpservletresponse response)      */     protected void dopost(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {         // todo auto-generated method stub          response.setcontenttype("text/html");         printwriter out = response.getwriter();         string name = request.getparameter("fullname");         string addr = request.getparameter("address");         string age = request.getparameter("age");         string qual = request.getparameter("qual");         string persent = request.getparameter("percent");         string year = request.getparameter("yop");         if(name.isempty()||addr.isempty()||age.isempty()||qual.isempty()||persent.isempty()||year.isempty())         {             requestdispatcher rd = request.getrequestdispatcher("registration.jsp");             out.println("<font color=red>oops!! missed out fields. fill them again</font>");             rd.include(request, response);         }         else         {             requestdispatcher rd = request.getrequestdispatcher("home.jsp");             rd.forward(request, response);         }     }   } 

jsp has inbuilt session variable can use. since reusing getting duplicate error.

this equivalent of doing session session=request.getsession() in servlet;