java.lang.NoClassDefFoundError: javax/mail/Address Exception when sending a mail from Eclipse?

[Kushi Gadiparthi]

Hi All,

I want to send a mail from Eclipse.

I had added the mail.jar in the library.

But still I am getting the following error

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: javax/mail/Message
	at client.MyView.process(MyView.java:743)
	at client.MyView.<init>(MyView.java:99)
	at client.application.MenuBar.jMenuItemMyView_actionPerformed(MenuBar.java:1977)
	at client.application.MenuBar.access$32(MenuBar.java:1975)
	at client.application.MenuBar$34.actionPerformed(MenuBar.java:909)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.AbstractButton.doClick(Unknown Source)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: javax.mail.Message
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(Unknown Source)
	at com.sun.jnlp.JNLPClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)

The JavaX has been added in the User Libraries of Eclipse it has following Jars
javax-wsdl-1.5.1.jar
jaxrpc.jar
mail.jar
saaj.jar

and my code looks as follows

import java.util.Properties;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.MimeMessage;



public class MailSender {
	
   private static String Subject = "Example";
		
  static public void SendingMail() throws AddressException, MessagingException{
			
 Properties prop = System.getProperties();
//System.out.println("prop::"+prop);
prop.put("mail.smtp.host","MySMTPName");

final Session session = Session.getDefaultInstance(prop, null);
//System.out.println("Session::"+session);
MimeMessage lMessage = new MimeMessage(session);
				
	try {
		lMessage.addRecipients(Message.RecipientType.TO, "MyMailAddress");
				lMessage.setSubject(Subject);
				lMessage.setText("This is an Example Mail");
				

				Transport.send(lMessage);
			}catch(Exception e){
				e.printStackTrace();
			}

		 }
	}	


//In my MyView class I am calling it as like this

if(valList == -1){
MailSender.SendingMail()
}

So Please help me to solve the above error

Thanks in Advance,

[Campbell Ritchie]

Which folder is that java mail .jar in?
How are you setting the classpath for your application?
When I Googled for Java Mail, I found a download page where Message appears to be in mail.jar. Please confirm you have got that mail.jar file in the classpath as well.

[Kushi Gadiparthi]

Hi,

Thanks for the Reply. I had added this jar in the eclipse --> preferences-->java-->BuildPath-->classpath variables.


But still no use, getting the same message.


Thanks in Advance.

[Ulf Dittmer]

Build path and runtime path are different things; both need all jar files.