Codigo-fonte (Erro de exception na main)

Programação Java
#1 
import javax.mail.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.util.*;
import javax.mail.internet.*;


public class Neon extends JFrame {
   

   
public JButton ok,limpar,sair;   
public JTextArea editor;
public JScrollPane rolagem;
public JTextField texto1,texto2,texto3;
public JLabel label1,label2,label3,label4;
   
   
   
   
   public Neon(String nome1,String nome2,String nome3,String nome4) 
   {
	
         super("Neonmail");	
	
        
        texto1 = new JTextField(20); 
        texto2 = new JTextField(20);
        texto3 = new JTextField(20);
        label1 = new JLabel(nome1);
        label2 = new JLabel(nome2);
        label3 = new JLabel(nome3);
        label4 = new JLabel(nome4);
        ok = new JButton("Send");
        limpar = new JButton("Clear");
        sair = new JButton("Quit");
      
       editor = new JTextArea(10,20);
       editor.setLineWrap(true);
       rolagem = new JScrollPane(editor);
      
      
       JPanel painel = new JPanel();	
       painel.add(label1);
       painel.add(texto1);
       painel.add(label2);
       painel.add(texto2);
       painel.add(label3);
       painel.add(texto3);
       painel.add(label4);
       painel.add(rolagem);
       painel.add(ok);
       painel.add(limpar);
       painel.add(sair);
	
	
        Container container = getContentPane(); 
        container.add(painel);
	
	
	
      setVisible(true);
      setSize(400,400);
      setLocation(300,300);
      	
	
	
	
	
     }
   
   
   
   
   

   
   
   public void setClear() 
     {
	
	
	limpar.addActionListener(new ActionListener() 
	{
	    public void actionPerformed(ActionEvent event)
	     {
		editor.setText("");
		texto1.setText("");
		texto2.setText("");
		texto3.setText("");
	        	
	     }
	});
				      
   
   
     }
   
   
   
   
  public void setQuit() 
     {   
	
	
	
	
           sair.addActionListener(new ActionListener()  
	   {	
	      public void actionPerformed(ActionEvent evento1)
		{ 
	                System.exit(0);	   
		   
		}
	   }
	      );
	
	
	
     }
   

       public void setSending() {


	  ok.addActionListener(new ActionListener() 
         {
          public void actionPerformed(ActionEvent evento2) 
          {				  
	      
				  
	     	  
	  
	  
        Properties properties = new Properties();
	properties.put("smtp.netsite.com.br","smtp.netsite.com.br");	
        Session session = Session.getInstance(properties, null);
	MimeMessage msg = new MimeMessage(session);
	
	
	         try 
	         {
	     	         
		      msg.setFrom(new InternetAddress(texto1.getText()));
		      msg.setRecipient(Message.RecipientType.TO, new InternetAddress(texto2.getText()));
		      msg.setSentDate(new Date());
		      msg.setSubject(texto3.getText());
		      msg.setText(editor.getText());
		 
		      Transport.send(msg);
		  }
		  catch (AddressException e) 
		  {
		      System.out.println("Error: " + e);
		  }
		  catch (MessagingException mes) 
		  {
		      System.out.println("Error: " + mes);
		  }
       }
	 
      });
	  










    }








   
   
   public static void main(String args[]) 
   {

     Neon neon = new Neon("From:","To:","Subject:","Message:");
          neon.setClear();
          neon.setQuit();
          neon.setSending();
   }
}
#2

???

#3

[root@localhost neon]# java -classpath /javamail/javamail-1.3.1/mail.jar Neon
Exception in thread “main” java.lang.NoClassDefFoundError: Neon

#4

Vc deve acresentar o .;

java -classpath .;/javamail/javamail-1.3.1/mail.jar Neon

#5