minecraft-java-edition – How to Send Twitch.tv Chat Messages in Minecraft

Batch files can only pass arguments to Java and Minecraft, and neither offer the option to start maximised. You will have to use an external program of some sort if you want it to maximise automatically. There are plenty of programs that will watch for a specific window and maximise it automatically, or wrap a program and maximise its window after launch, but there are too many to give a recommendation.

Aside, MagicLauncher doesn't keep running after it launches Minecraft. For just this one option I understand not wanting a whole new application to run, but it still running in the background isn't something you have to worry about.

You can use them as you would use a regular command in chat.

Example:

• /give [user] 1 2

This gives [user] two of item id 1 when the command block is activated with redstone.

• /gamemode [user] [0, 1, 2]

This will change [user]'s gamemode to either 0 (Survival) 1 (Creative) or 2 (Adventure)

Note and Edit: Buttons S (Survival) C (Creative) and A (Adventure) work as well as SevenSidedDie has noted for /gamemode