SystemMessage msg = new SystemMessage(SystemMessageId.YOU_HAVE_SUCCEEDED_INVITING_FRIEND);
requestor.sendPacket(msg);
// Player added to your friendlist
msg = new SystemMessage(SystemMessageId.S1_ADDED_TO_FRIENDS);
msg.addString(player.getName());
requestor.sendPacket(msg);
requestor.getFriendList().add(player.getName());
// has joined as friend.
msg = new SystemMessage(SystemMessageId.S1_JOINED_AS_FRIEND);