How do I use .java files and recompile the code?

[jungltemple]

Yeah, I don't really understand Java that much.

How do I decompile the code into .java files rather than .class files, so that I can edit them directly in IntelliJ?
And how do I run the decompiled code? It doesn't come with Gradle by default, so I'm a bit confused.
Also, for some reason my decompiled 1.21.1 code doesn't have the net.minecraft.client.Main class, which is the entrypoint listed in the MANIFEST.MF file.

[XiaoPangxie732]

How do I decompile the code into .java files rather than .class files, so that I can edit them directly in IntelliJ?

Run MCD with your args and -r -d

And how do I run the decompiled code? It doesn't come with Gradle by default, so I'm a bit confused.

You need to figure out it yourself. Providing a useable workspace is not the goal of MCD. And usually the decompiled code cannot be directly recompiled because it contains errors. Maybe you should use MCP-Reborn instead.

Also, for some reason my decompiled 1.21.1 code doesn't have the net.minecraft.client.Main class, which is the entrypoint listed in the MANIFEST.MF file.

It is probably a bug, I'll figure it out asap

[XiaoPangxie732]

It is probably a bug, I'll figure it out asap

I get it. It is a bug from Mojang. The actual main class is net.minecraft.client.main.Main

[jungltemple]

Thank you! My problem with MCP-Reborn is that it doesn't support 1.21.1 and also has trouble with my Java 21 toolchain, but I'll think about it.