larsgerrits

Why is there a taco.json in src/main/java/com/matthyfamily/init/recipes/? Remove it. No wonder you're getting those ZipExceptions, your entire resource folder structure is messed up.

They have been renamed/moved. updateTick is now called tick. To schedule a tick you call IWorld#getPendingBlockTicks().scheduleTick()

This has been fixed in 25.0.81.

Custom model loaders have not been implemented, as such you can't load .obj models right now.

...What...the... That's a copy of the vanilla furnace. Yes, this is how things are done in vanilla. World#getBlockState and IBlockState#getBlock.

It can't find your model file because you're missing the assets folder. In src/main/resources should be a folder called "assets" which contains the "lang", "models", "recipes" and "textures" folders. the pack.mcmeta and mcmod.info should remain in the resources folder.

Post the logs.

You should use "Build Project" instead of "Rebuild Project" if you only change code. Building your product only recompiles the changed classes while rebuilding it recompiles every class again, taking much more time. Rebuilding is sometimes required if you change resources in debug mode.

This is never going to be possible with Minecraft. Or any other game probably. Minecraft itself is constantly being updated to be more efficient and in the 1.13 update world generation got its own thread. The mod launcher has also been rewritten from scratch to allow parallel mod loading which significantly increase loading times. But what you are suggesting is not going to be possible.

What do you want to achieve? There might be other ways to achieve what you want.

You can register IRecipes just fine, but you need to reference them from a JSON recipe file. To register a custom IRecipe you need to get a RecipeType usingRecipeType.get (look at VanillaRecipeTypes). You also need to register a custom IRecipeSerializer using RecipeSerializers.register. RecipeSerializers also contain the registering of all vanilla serializers. To use your custom IRecipe, set the type of your recipe to the ResourceLocation you specified from YourIRecipeSerializer#getName.

You don't. When the data changes on in the GUI, you send a packet from the client to the server containing the new information. The server will receive that packet and pass it to the packet handler together with the player, where you can verify if the data is correct (to prevent cheating) and set the capability data.

You don't have to with Java 8+. @DcZipPL don't provide copy/paste code like that. He doesn't learn anything from it and it's actually wrong in multiple places. @TheHex create your Items in a RegistryEvent.Register<Item> event handler instead of a static initializer.

Look at at net.minecraft.command.Commands. It registers all commands there and you can open each one of them to see how they work.

You shouldn't even have had that in the beginning, remove it. How are you building your mod?