XEP-0054: vcard-temp

VCardManager vCardManager = xmppClient.getManager(VCardManager.class);
VCard vCard = vCardManager.getVCard(Jid.of("juliet@example.net")).getResult();
if (vCard != null) {
    if (vCard.getName() != null) {
        String familyName = vCard.getName().getFamilyName();
        String givenName = vCard.getName().getGivenName();
        // ...
    }
    if (vCard.getPhoto() != null) {
        byte[] imageData = vCard.getPhoto().getValue();
        BufferedImage bufferedImage = ImageIO.read(new ByteArrayInputStream(imageData));
        // ...
    }
    for (VCard.Address address : vCard.getAddresses()) {
        String street = address.getStreet();
        String city = address.getCity();
        // etc...
    }
}

VCardManager vCardManager = xmppClient.getManager(VCardManager.class);
VCard vCard = new VCard();
vCard.setName(new VCard.Name("Family Name", "Given Name", "Middle Name"));
vCard.setNickname("Nickname");
vCardManager.setVCard(vCard);