How to log player join event? Example?

Google Forge Events.

 

Use PlayerLoggedInEvent.

 

Note: this event is fired only by server thread.

More about sides: http://mcforge.readthedocs.io/en/latest/concepts/sides/

What exactly do you want to "log"?

 

Do you want to store who entered in a server in a given time (lets say for a block that does X thing) or simply catch the event so that you can do something based on a player's entry in the game?

 

In both you should look at forge events and event handling, these link should help you

 

http://jabelarminecraft.blogspot.ca/p/minecraft-forge-172-event-handling.html

http://bedrockminer.jimdo.com/modding-tutorials/advanced-modding/event-handler/

http://minecraftforgetutorials.weebly.com/event-introduction.html

 

And the best tutorial imo: http://greyminecraftcoder.blogspot.ca/2013/12/forge-techniques-events.html

I want to log and save a list: players joined the server

 

inside log file:

MC username, and time they joined, and how many have joined

I want to log and save a list: players joined the server

 

inside log file:

MC username, and time they joined, and how many have joined

Note that PlayerLoggedInEvent has the joined player as public field.

1. MC username: player.getDisplayName()

2. Time they joined: I'd assume that you know how to get system time.

To get minecraft time, use World#getWorldTime(). (Player has public field named worldObj)

Get the Overworld using MinecraftServer#getEntityWorld() to get universal server time.

3. How many players have joined:

  - length of World#playerEntities for players in the world.

  - MinecraftServer#getCurrentPlayerCount() for all players in the server.

 

And what do you mean (EDIT) by saving the list?