src/main/java/com/example/examplemod/ExampleMod.java


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package com.example.examplemod;

import net.minecraft.block.Block;
import net.minecraft.block.Blocks;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.RegistryEvent;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.InterModComms;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.event.lifecycle.FMLClientSetupEvent;
import net.minecraftforge.fml.event.lifecycle.FMLCommonSetupEvent;
import net.minecraftforge.fml.event.lifecycle.InterModEnqueueEvent;
import net.minecraftforge.fml.event.lifecycle.InterModProcessEvent;
import net.minecraftforge.fml.event.server.FMLServerStartingEvent;
import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.util.stream.Collectors;

// The value here should match an entry in the META-INF/mods.toml file
@Mod("examplemod")
public class ExampleMod
{
   // Directly reference a log4j logger.
   private static final Logger LOGGER = LogManager.getLogger();

   public ExampleMod() {
      // Register the setup method for modloading
      FMLJavaModLoadingContext.get().getModEventBus().addListener(this::setup);
      // Register the enqueueIMC method for modloading
      FMLJavaModLoadingContext.get().getModEventBus().addListener(this::enqueueIMC);
      // Register the processIMC method for modloading
      FMLJavaModLoadingContext.get().getModEventBus().addListener(this::processIMC);
      // Register the doClientStuff method for modloading
      FMLJavaModLoadingContext.get().getModEventBus().addListener(this::doClientStuff);

      // Register ourselves for server and other game events we are interested in
      MinecraftForge.EVENT_BUS.register(this);
   }

   private void setup(final FMLCommonSetupEvent event)
   {
      // some preinit code
      LOGGER.info("HELLO FROM PREINIT");
      LOGGER.info("DIRT BLOCK >> {}", Blocks.DIRT.getRegistryName());
   }

   private void doClientStuff(final FMLClientSetupEvent event) {
      // do something that can only be done on the client
      LOGGER.info("Got game settings {}", event.getMinecraftSupplier().get().options);
   }

   private void enqueueIMC(final InterModEnqueueEvent event)
   {
      // some example code to dispatch IMC to another mod
      InterModComms.sendTo("examplemod", "helloworld", () -> { LOGGER.info("Hello world from the MDK"); return "Hello world";});
   }

   private void processIMC(final InterModProcessEvent event)
   {
      // some example code to receive and process InterModComms from other mods
      LOGGER.info("Got IMC {}", event.getIMCStream().
            map(m->m.getMessageSupplier().get()).
            collect(Collectors.toList()));
   }
   // You can use SubscribeEvent and let the Event Bus discover methods to call
   @SubscribeEvent
   public void onServerStarting(FMLServerStartingEvent event) {
      // do something when the server starts
      LOGGER.info("HELLO from server starting");
   }

   // You can use EventBusSubscriber to automatically subscribe events on the contained class (this is subscribing to the MOD
   // Event bus for receiving Registry Events)
   @Mod.EventBusSubscriber(bus=Mod.EventBusSubscriber.Bus.MOD)
   public static class RegistryEvents {
      @SubscribeEvent
      public static void onBlocksRegistry(final RegistryEvent.Register<Block> blockRegistryEvent) {
         // register a new block here
         LOGGER.info("HELLO from Register Block");
      }
   }
}