Trouble running the demo msgshow class

Question

Hello,
I'm able to compile the msgshow.java file...here's my commandline results:
C:\javaclass\javamail-1_3_1\javamail-1.3.1>javac msgshow.java
C:\javaclass\javamail-1_3_1\javamail-1.3.1>dir msg*
04/07/2004 07:32a 7,421 msgshow.class
04/07/2004 12:09a 7,642 msgshow.java
2 File(s) 15,063 bytes
0 Dir(s) 35,521,511,424 bytes free
However... when I now run msgshow I get this:
C:\javaclass\javamail-1_3_1\javamail-1.3.1>java msgshow
Exception in thread "main" java.lang.NoClassDefFoundError: msgshow
That error makes no sense. Class msgshow is the primary class in the program...containing main(). How can Java claim it can't se msgshow?
Here are the top several lines of msgshow.java...to show the class definition....
import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
* Demo app that exercises the Message interfaces.
* Show information about and contents of messages.
* msgshow protocol host user password mailbox msgnum
public class msgshow {
static String protocol;
static String host = null;
static String user = null;
static String password = null;

Answer 1

Perhaps there's an easier way to solve this. I'm just trying to find some sample code that will connect to my pop3 server and let me retreive/parse/delete messages. I can write the parser easily, I'm just looking for something that demonstrates connecting to POP3 and retreiving messages.
Is there simpler code available that does this?
(I'm trying to make a simple mail parser/spam filter to build some Java experience)