java mail function

/*sendMail function for single recipient*/

public void sendMail(String from, String to, String subject, String messageBody)
        throws MessagingException, AddressException
    {
        Properties props = System.getProperties();
        props.put("hostname", "servername");
        Session session = Session.getDefaultInstance(props, null);
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));
        InternetAddress addressTo = new InternetAddress(to);
        message.setRecipient(javax.mail.Message.RecipientType.TO, addressTo);
        message.setSubject(subject);
        BodyPart messageBodyPart = new MimeBodyPart();
        messageBodyPart.setText(messageBody);
        message.setContent(messageBody, "text/html");
        Transport.send(message);
  }

/*sendMail function for multiple recipient*/

    public void sendMail(String from, String to[], String subject, String messageBody)
        throws MessagingException, AddressException
    {
        Properties props = System.getProperties();
        props.put("hostname", "servername");
        Session session = Session.getDefaultInstance(props, null);
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));
        InternetAddress addressTo[] = new InternetAddress[to.length];
        for(int i = 0; i < to.length; i++)
            addressTo[i] = new InternetAddress(to[i]);

        message.setRecipients(javax.mail.Message.RecipientType.TO, addressTo);
        message.setSubject(subject);
        BodyPart messageBodyPart = new MimeBodyPart();
        messageBodyPart.setText(messageBody);
        message.setContent(messageBody, "text/plain");
        Transport.send(message);
    }


/*sendMail function for single recipient with cc and bcc*/

    public void sendMail(String from, String to, String cc, String bcc, String subject, String messageBody)
        throws MessagingException, AddressException
    {
        Properties props = System.getProperties();
        props.put("hostname", "servername");
        Session session = Session.getDefaultInstance(props, null);
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));
        InternetAddress addressTo = new InternetAddress(to);
        InternetAddress addressCC = new InternetAddress(cc);
        InternetAddress addressBCC = new InternetAddress(bcc);
        message.setRecipient(javax.mail.Message.RecipientType.TO, addressTo);
        message.addRecipient(javax.mail.Message.RecipientType.CC, addressCC);
        message.addRecipient(javax.mail.Message.RecipientType.BCC, addressBCC);
        message.setSubject(subject);
        BodyPart messageBodyPart = new MimeBodyPart();
        messageBodyPart.setText(messageBody);
        message.setContent(messageBody, "text/html");
        Transport.send(message);
    }