Email: java.lang.ClassFormatError

[Lila Fowler]

Hi all,

I am trying to send a simple email from a java application (not a ee application), I am using NetBeans and have imported the:

"Java EE 6 API Library - javaee-api-6.0.jar" - located in the NetBeans sub-folder
"javaee.jar" - located in the glassfish lib folder

Netbeans found no syntax errors and all the imports where excepted once I had added the above files.

But when i run the program I get the following exception:

run:
java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/mail/Address
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
Could not find the main class: linxaslicencemanagment.MailClient. Program will exit.
Exception in thread "main" Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)

Any ideas as to what can be causing this or how I am able to solve this?
All the google-ing i did on the exception told me that adding the library was not enough
as it didn't actually have those classes/methods and that I had to add the .jar as well.
But the exception hasn't changed.

Here is the code:

package linxaslicencemanagment;

 import javax.mail.*; 
 import javax.mail.internet.*; 
 import javax.activation.*; 
 import java.io.*; 
 import java.util.Properties; 

 public class MailClient 
 { 
       public void sendMail(String mailServer, String from, String to, 
                             String subject, String messageBody, 
                             String[] attachments) throws 
                                MessagingException, AddressException 
     { 
         // Setup mail server 
         Properties props = System.getProperties(); 
         props.put("mail.smtp.host", mailServer); 
          System.err.println("Gets here");
         // Get a mail session 
         Session session = Session.getDefaultInstance(props, null); 
          
         // Define a new mail message 
         Message message = new MimeMessage(session); 
         message.setFrom(new InternetAddress(from)); 
         message.addRecipient(Message.RecipientType.TO, new InternetAddress(to)); 
         message.setSubject(subject); 
          
         // Create a message part to represent the body text 
         BodyPart messageBodyPart = new MimeBodyPart(); 
         messageBodyPart.setText(messageBody); 
         //use a MimeMultipart as we need to handle the file attachments 
         Multipart multipart = new MimeMultipart(); 
          //add the message body to the mime message 
         multipart.addBodyPart(messageBodyPart); 
         // add any file attachments to the message 
         addAtachments(attachments, multipart); 
          // Put all message parts in the message 
         message.setContent(multipart); 
         // Send the message 
         Transport.send(message); 
       } 
       protected void addAtachments(String[] attachments, Multipart multipart) 
                     throws MessagingException, AddressException 
     { 
         for(int i = 0; i<= attachments.length -1; i++) 
         { 
             String filename = attachments[i]; 
             MimeBodyPart attachmentBodyPart = new MimeBodyPart(); 
             //use a JAF FileDataSource as it does MIME type detection 
             DataSource source = new FileDataSource(filename); 
             attachmentBodyPart.setDataHandler(new DataHandler(source)); 
             //assume that the filename you want to send is the same as the 
             //actual file name - could alter this to remove the file path 
             attachmentBodyPart.setFileName(filename); 
              
             //add the attachment 
             multipart.addBodyPart(attachmentBodyPart); 
         } 
     } 
  
     public static void main(String[] args) 
     { 
         try 
         { 
             System.out.println("Mains");
             MailClient client = new MailClient(); 
             String server="mail.documation.co.za"; 
             String from="The Test"; 
             String to = "[e-mail]"; 
             String subject="Test"; 
             String message="Testing"; 
             String[] filenames = {"c:\\somefile.txt"}; 
          client.sendMail(server,from,to,subject,message,filenames); 
         } 
         catch(Exception e) 
         { 
             e.printStackTrace(System.out); 
         } 
          
     } 
 }

Any Ideas as to what I am doing incorrectly?
Thanks

[Lila Fowler]

Update:
Added the javax.mail.jar to my lib but am still getting the same exception.

Any Ideas?
Thanks

[Saikat Roy Mahasay]

Did you try it outside NetBeans ? I tried to copy-paste and run your code in eclipse, and it sort of worked. At least I didn't get the ClassFormatError. I used java 1.6 and javamail-1.4.2.

[Lila Fowler]

Thanks Saikat,

That exception does disappear when I use it in Eclipse and not NetBeans? - weird.

I added a few changes for the errors I was getting now its getting to a part of the code and just stopping.
I'v waited 30min and it doesn't move on or return any exceptions or errors.

Decided to try get gmail working correctly first.
Any ideas as to what I am doing incorrectly?

Code is the same as above with edited code below. //16 = line changed

props.put("mail.smtp.starttls.enable", "true");  //extra code below 17
Transport transport = session.getTransport("smtp"); //extra code below 40
System.err.println("2.5"); //freezes here
transport.connect(mailServer, 465, "[e-mail]", "password"); //used 465 because 587 throws errors
String server="smtp.gmail.com"; //68
String from="[e-mail]";   //69
String to = "[e-mail]"; //70

Thanks.

[Lila Fowler]

Update:

After about 2hours I got the following exception:

javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465, response: -1
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1922)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:638)
at javax.mail.Service.connect(Service.java:295)
at linxaslicencemanagment.MailClient.sendMail(MailClient.java:45)
at linxaslicencemanagment.MailClient.main(MailClient.java:83)

[Lila Fowler]

Final working code for future reference if anyone may need it:

package linxaslicencemanagment;

import javax.mail.*;
import javax.mail.internet.*;

import java.util.Properties;
import javax.activation.FileDataSource;
import javax.activation.DataHandler;

        
public class SendAutoMail 
{
    private static final String hostName = "smtp.gmail.com";
    private static final int hostPort = 465;
    private static final String senderAddress = "[e-mail]";
    private static final String password  = "emailPassword";
    
    public void sendEmail(String company, String licence, String remdate, String expdate, String attachments, String supportcontract, String signedcontract, String licenceorigin) throws Exception
    {
    	//Properties
        Properties props = new Properties();
        props.put("mail.transport.protocol", "smtps");
        props.put("mail.smtps.host", hostName);
        props.put("mail.smtps.auth", "true");
        
        //Session
        Session mailSession = Session.getDefaultInstance(props);
        mailSession.setDebug(true);

        //Text
        MimeBodyPart text = new MimeBodyPart();
        text.setText("Company: " + company + "\n Licence: " + licence + "\n Expiration Date: " + expdate + "\n Support Contract: " + supportcontract +
        		     "\n Signed Contract: " + signedcontract + "\n Licence Origin: " + licenceorigin);

        //Attachment
        FileDataSource fds = new FileDataSource("c:\\somefile.txt");
        MimeBodyPart attachment = new MimeBodyPart();
        attachment.setDataHandler(new DataHandler(fds));
        attachment.setFileName(fds.getName());
     
        //Create Multipart & Add Parts
        Multipart content = new MimeMultipart();
        content.addBodyPart(text);
        content.addBodyPart(attachment);

        //Compile Message
        MimeMessage message = new MimeMessage(mailSession);
        message.setSubject("Testing Email");
        message.setContent(content);
        message.addRecipient(Message.RecipientType.TO, new InternetAddress("[e-mail]"));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress("[e-mail]"));
        
        //Send Message
        Transport transport = mailSession.getTransport();
        transport.connect(hostName, hostPort, senderAddress, password);
        transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
        transport.close();
    }
    
    public static void main(String[] args) throws Exception
    {
       new SendAutoMail().sendEmail("a","b","c","d","e","f","g","h");
    }
}