Is it possible to turn a Minecraft single player map into multi-player server?
I have wanted to invite my brother to my Single Player world because he hasn't been able to find much diamond. I can find 30 in an hour so I wanted to give him some diamond, build a house for him and have him help me in my mine, but I don't know if I can. I don't want to play on a multiplayer server because it's very time consuming to make one and I don't want to get griefed on a public one.
How can we play together?