Can someone help me to write code to reload .jar file from libs?

it's pretty simple.

Just add what you wanna add to your pack, compile it and then replace the old l2jserver.jar(or whatever is named)

with the new generated one in your server files.

Restart your server and you are ready

i want to make reload without restarting server, is it possible?

 

i want to make reload without restarting server, is it possible?

 

maybe it's possible but it may cause a server crush or sth. It's better to make a restart.