Java EE (Java Enterprise Edition) General Discussion

I am working on a Linux machine trying to run a simple application of JavaMail.

I have made a class called JavaMail. It compiles alright. When I run it using simply java MailTest, I get the following error <i> java.lang.NoClassDefFoundError: MailTest</i>

I made a jar file called app.jar. When I run it, the error I am getting is <b>java.lang.NoClassDefFoundError: javax/mail/Session.</b> The code snippet is as follows.

<code>
import javax.mail.internet.*;
import javax.mail.*;
import java.util.*;

public class MailTest
{

public void runIt()
{
try
{
String username = "myUsername";
String password = "myPassword";

System.out.println("Hello and Welcome to my Mail Client");
Properties prop = new Properties();

// The error is on this line
Session session = Session.getDefaultInstance(prop,null);
Store store = session.getStore("pop3");

store.connect("10.10.11.156",username,password);

Folder folder = store.getFolder("INBOX");

folder.open(Folder.READ_ONLY);

Message msg[] = folder.getMessages();

System.out.println(" A Total of "+msg.length+" message");
System.out.println("**********************************");
for (int i=0; i<msg.length; i++)
{
System.out.println("# "+(1+i)+" : "+msg.getFrom()[0]);
System.out.println("Subject : \t"+msg[i].getSubject()+"\n");

}

}
catch(Exception e)
{
System.err.println("Error");
}
catch(Error e)
{
System.out.println("Linkage error: "+e);
}

}


public static void main(String arg[])
{
try{

MailTest m = new MailTest();
m.runIt();
}
catch (Exception e)
{
System.out.println("A Run time Exception has occurred"+e);
}

catch (Throwable e)
{
System.out.println("A fatal exception: "+e);
}

finally { System.out.println("System is shutting down now");
}
}
}


</code>

I am also listing the text of .bash_profile so that you can understand the paths which I setup.

The jdk,j2ee,mailAPI and jaf are all set on my account.
<i>
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi

# User specific environment and startup programs

#PATH=$PATH:$HOME/bin
JAVA_HOME=$HOME/jdk
J2EE_HOME=$HOME/j2ee
PATH=$PATH:$HOME/j2ee/bin:$HOME/jdk/bin:$HOME/j2ee/lib:$HOME/javamail:$HOME/javamail/lib:$HOME/jaf:$HOME/jdk/lib
CLASSPATH=$HOME/javamail/mail.jar:$HOME/jaf/activation.jar:$HOME/javamail/lib/pop3.jar:$HOME/j2ee/lib/j2ee.jar
export PATH
export JAVA_HOME
export J2EE_HOME
export CLASSPATH
unset USERNAME
</i>

The classpaths, all seem alright but I can understand what the problem is. Can someone please help me out.