I'm looking for a program code for a game like Minecraft and I ask for help.
How naive are you that you seriously believe that someone simply shows you their source code for a game that is as complex as Minecraft?
That should be much easier.
No! You have to use a game engine for example unity and this also needs his code which probably took me weeks and well nobody will give you that… Just go to google and write "Minecraft source code github" and done…
Minecraft is not open source. If you want to write a Minecraft like game. Feel free. You just have to start from 0.
By the way: disassembling compiled source code is illegal as long as you do not have permission from Mojang / Microsoft
Google times for MCP (Mod Coder Pack)