I've created a jakarta.mail.internet.InternetAddress
InternetAddress system = new InternetAddress("nunyi@gmail.com");
but there is no set to set it as RecipientType BCC
InternetAddress is an object used to define address and has no property of type. However you can set the type when added this address to your message:
InternetAddress system = new InternetAddress("nunyi@gmail.com"); message.setRecipients(Message.RecipientType.TO, system);