I tried to use java reflection in many ways to get the ping of a player. But at 100%, it returns 0ms.
I\'ve searched for a long time, so... can someone help me?
Finally, it works.
The problem is my FAI : A few days ago, I opened 25565 ports for UDP/TCP and I also change other parameters.
Since I turn off all these options, my ping was magically back to 8-12 ms.
Thanks kahveci for your edit suggestion and sorry for the inconvenience.