java - How to read email contents? -

i have developed simple java application reads gmail inbox mails. able read email , subject. but, unable read email contents.

when try read it, below exception:

exception msg: com.sun.mail.imap.imapinputstream cannot cast javax.mail.multipart 

code:

import com.sun.mail.imap.imapfolder; import com.sun.mail.imap.imapstore;  import javax.mail.address; import javax.mail.bodypart; import javax.mail.message; import javax.mail.messagingexception; import javax.mail.multipart; import javax.mail.session;  import java.io.ioexception; import java.util.list; import java.util.properties;   public class read_mail {      static string from;      public static void main(string args[])     {          properties props = new properties();          props.setproperty("mail.store.protocol", "imaps");           session session = session.getdefaultinstance(props,null);           imapstore imapstore = null;           try          {              imapstore = (imapstore) session.getstore("imaps");              imapstore.connect("imap.gmail.com", "usernamexxxxx@gmail.com", "passwordxxx");               final imapfolder folder = (imapfolder) imapstore.getfolder("inbox");               folder.open(imapfolder.read_only);               message[] messages = folder.getmessages();                 (int = 0; < messages.length; i++) {                     message message = messages[i];                     system.out.println("==============================");                     system.out.println("email #" + (i + 1));                     system.out.println("subject: " + message.getsubject());                     system.out.println("from: " + message.getfrom()[0]); //                  system.out.println("text: " + message.getcontent());                      object mp = (object) message.getcontent();                      if (mp instanceof string)                       {                           string body = (string)mp;                         system.out.println("msg body : " + body);                     }                       else if (mp instanceof multipart)                       {                           multipart mpp = (multipart)mp;                         final bodypart bp = mpp.getbodypart(i);                         system.out.println("text: " +bp.getcontent().tostring());                     } else {                         system.out.println("inside else");                         multipart mpp = (multipart)mp;                         final bodypart bp = mpp.getbodypart(i);                         system.out.println("text: " +bp.getcontent().tostring());                     }                  }          }          catch(exception e)          {             system.out.println("exception msg: " + e.getmessage());           }     } } 

it goes inside else block , fires exception.

not sure you're asking.

in final else you're ignoring fact you've determined it's not multipart (it failed instanceof multipart) go ahead , try , cast multipart anyway. of course it's going fail.

now know imapinputstream possibility, add else-if class (or, better, inputstream) , process other stream. better yet, java ee docs stream returned if doesn't know data type, maybe that's final else.

if check stream, final else should generate error of sort.