How do class work?

[thatdumbdevit]

Hi,
I'm still approaching the developing world, so there's something I don't understand
I often see this:

import net.minecraft.class_1267;
import net.minecraft.class_1297;
import net.minecraft.class_1299;
import net.minecraft.class_1309;
import net.minecraft.class_1559;
import net.minecraft.class_1657;
import net.minecraft.class_1972;
import net.minecraft.class_2246;
import net.minecraft.class_2338;
import net.minecraft.class_3218;
import net.minecraft.class_3532;

or even this:

public boolean maxNearbyMonsters(class_3218 world, class_1657 player) {
        int max;
        if (world.method_8407() == class_1267.field_5805) {
            max = 1;
        } else if (world.method_8407() == class_1267.field_5802) {
            max = 2;
        } else if (world.method_8407() == class_1267.field_5807) {
            max = 3;
        } else {
            max = 1;
        }

How does "class_number" or "method_number" work?

[haykam821]

These are intermediary names for unmapped classes and methods. They function exactly like normal classes and methods, but do not have a useful name or package to refer to them (such as DynamicRegistryManager in place of class_5455).

[thatdumbdevit]

The class list you sent me is for Minecraft 21w16a (1.17 Snapshot). Can you send me the 1.16.5 version?

[Chocohead]

The list for 1.16.5 is here.

I would ask where you're getting the sources in Intermediary from in the first place? If you're decompiling the Minecraft jar you'd be better running the genSources task which will use the Yarn names rather than Intermediary.

[thatdumbdevit]

I was decompiling a mod that I found on Internet. Also, thanks for the advice. I always use genSources on VSCode, but in that moment I was not using any IDE, I was using jadx-gui-1.2.0, a program that just allow to see the decompiled content of a Jar file, but nothing else. Another question, is this the official decompiled Jar of Minecraft? If it isn't, can you link me the official one?

[rdvdev2]

I would recommend you to check out this wiki page on obfuscation and mappings, as it looks like you don't know either concept. Read it from start to end, and I think it will all become clear.

[thatdumbdevit]

As I said, I'm still approaching the developers world, so thank you, that will be really useful for me!