That's how you connect to a pre-existing server. But if you want to create a server of your own, here's how to do it. How to create your own 'Minecraft: Java' server Important: The steps below ...

So, if your IP address is 48.32.34.102, and your Minecraft server is on port 25565, then you'd tell your friends to enter 48.32.34.102:25565 in the address field of Minecraft.