JavaCard OS

Hi it´s me again

i want to write an applet which
starts an URL on my Phone using NDEF
but can´t find any tutorials on the
internet.

Please can someone give me some usefull links?
I thought there is a library.

What do you want to implement?
It is my understanding：
1 The phone scan one text or image;
2 Phone pass the text/image information to the card;
3 The applet in the card response one url;
4 The phone open the url with web browser or web browser component.
Is it your needs?

I want to write a NDEF-Message like Smartposter
on my card and via NFC my Smartphone knows
what to do.
I think that´s what i need:
https://learn.adafruit.com/adafruit-pn532-rfid-nfc/ndef

It´s not a JavaCard case, it´s Mifare
I think.