public boolean enviarCorreo(String mensaje, String asunto){
    boolean enviado = false;
        try{
            String de = "[email protected]"; String clave =
            "contraseña";
            String para="[email protected]";
            String host = "smtp.gmail.com";

            Properties prop = System.getProperties();

            prop.put("mail.smtp.starttls.enable","true");
            prop.put("mail.smtp.host", host);
            prop.put("mail.smtp.user",de);
            prop.put("mail.smtp.password", clave);
            prop.put("mail.smtp.port",587);
            prop.put("mail.smtp.auth","true");

            Session sesion = Session.getDefaultInstance(prop,null);

            MimeMessage message = new MimeMessage(sesion);

            message.setFrom(new InternetAddress(de));

            message.setRecipient(Message.RecipientType.TO, new
            InternetAddress(para));

            message.setSubject(asunto);
            message.setText(mensaje);

            Transport transport = sesion.getTransport("smtp");

            transport.connect(host,de,clave);

            transport.sendMessage(message, message.getAllRecipients());

            transport.close();

            enviado = true;

        }catch(Exception e){
            e.printStackTrace();
        }

    return enviado;
}