This is something I've been trying to do for a couple days, and I can't seem to figure it out. Basically I want to be able to launch Minecraft with my modded code and test it in-game while logged into my own account. If this is not possible I will just work around it, but I rather be able to do this because it would make the project I'm working on 10x easier.

 

Thanks In Advance

-XenParadox

In eclipse, go to Run > Run Configurations...

Under Client, go to the arguments tab, and under program arguments add the argument "--username [your username]" without the quotes, replacing [your username] with your minecraft username. I think that should work, although I'm not sure.

Thanks, this did indeed work.

It will give you your username and skin, but you are not "logged in" so don't expect to be able to log into online-mode=true servers

Hmmm...this doesn't seem to work now...is there a new way to do it?

 

EDIT: Literally as soon as I posted this, I got it working.

 

Now, all you need to do is go to Run, then Run Configurations. Click on Client under Java Application (there are two Client, but you only need to edit one). Then, under the arguments tab, find the Program Arguments. Now type: --username YOURUSERNAME and replace YOURUSERNAME with your username (duh). Hope this helps!

Is there a good way to do this with IntelliJ?

Its program arguments, it doesn't matter wether its Eclipse or IntelliJ.

Heres a link for IntelliJ Run configurations though

https://www.jetbrains.com/help/idea/creating-and-editing-run-debug-configurations.html