how create package of this java code

Hi,i have email code in java which is working fine with out making package but when i want to make package of this code its stop working.Its showing exception while I execute it.I have to use this code in jsp to send mail. please help , my code is....

package javap; import javax.mail.*; import javax.mail.internet.*; import java.util.*; import java.io.*;

public class sendmail {

private static final String SMTPHOSTNAME = "smtp.gmail.com"; private static final String SMTPAUTHUSER = "abc"; private static final String SMTPAUTHPWD = "xyz";

private static final String emailMsgTxt = "this is test mail"; private static final String emailSubjectTxt = " Subject"; private static final String emailFromAddress = "abc";

// Add List of Email address to who email needs to be sent to private static final String[] emailList = {"xyz.com"};

public static void main(String args[]) throws Exception { sendmail smtpMailSender = new sendmail(); smtpMailSender.postMail( emailList, emailSubjectTxt, emailMsgTxt, emailFromAddress); System.out.println("Sucessfully Sent mail to All Users"); }

public void postMail( String recipients[ ], String subject, String message , String from) throws MessagingException { boolean debug = false;

 Properties props = new Properties();
 props.put("mail.smtp.host", SMTP_HOST_NAME);
 props.put("mail.smtp.auth", "true");

Authenticator auth = new SMTPAuthenticator();
Session session = Session.getDefaultInstance(props, auth);

session.setDebug(debug);


Message msg = new MimeMessage(session);


InternetAddress addressFrom = new InternetAddress(from);
msg.setFrom(addressFrom);

InternetAddress[] addressTo = new InternetAddress[recipients.length];
for (int i = 0; i < recipients.length; i++)
{
    addressTo[i] = new InternetAddress(recipients[i]);
}
msg.setRecipients(Message.RecipientType.TO, addressTo);



msg.setSubject(subject);
msg.setContent(message, "text/plain");
Transport.send(msg);

}

private class SMTPAuthenticator extends javax.mail.Authenticator {

public PasswordAuthentication getPasswordAuthentication()
{
    String username = SMTP_AUTH_USER;
    String password = SMTP_AUTH_PWD;
    return new PasswordAuthentication(username, password);
}

}

}