first commit

src/main/java/com/learning/Learning.java

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+package com.learning;
+
+import net.fabricmc.api.ModInitializer;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.learning.item.CustomItem;
+import com.learning.itemgroup.CustomItemGroup;
+
+public class Learning implements ModInitializer {
+	public static final String MOD_ID = "learning";
+
+	// This logger is used to write text to the console and the log file.
+	// It is considered best practice to use your mod id as the logger's name.
+	// That way, it's clear which mod wrote info, warnings, and errors.
+	public static final Logger LOGGER = LoggerFactory.getLogger(MOD_ID);
+
+	@Override
+	public void onInitialize() {
+		// This code runs as soon as Minecraft is in a mod-load-ready state.
+		// However, some things (like resources) may still be uninitialized.
+		// Proceed with mild caution.
+
+		LOGGER.info("Hello Fabric world!");
+        CustomItem.registerItems();
+        CustomItemGroup.registerItemGroup();
+	}
+}

src/main/java/com/learning/LearningDataGenerator.java

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+package com.learning;
+
+import net.fabricmc.fabric.api.datagen.v1.DataGeneratorEntrypoint;
+import net.fabricmc.fabric.api.datagen.v1.FabricDataGenerator;
+
+public class LearningDataGenerator implements DataGeneratorEntrypoint {
+	@Override
+	public void onInitializeDataGenerator(FabricDataGenerator fabricDataGenerator) {
+
+	}
+}

src/main/java/com/learning/component/Foods.java

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+package com.learning.component;
+
+import net.minecraft.component.type.FoodComponent;
+
+public class Foods {
+  public static FoodComponent toastFood = new FoodComponent.Builder().nutrition(4).build();
+}

src/main/java/com/learning/item/CustomItem.java

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+package com.learning.item;
+
+
+import java.util.function.Function;
+
+import com.learning.Learning;
+import com.learning.component.Foods; 
+import com.learning.item.Toast;
+
+import net.minecraft.item.Item;
+import net.minecraft.registry.Registries;
+import net.minecraft.registry.Registry;
+import net.minecraft.registry.RegistryKey;
+import net.minecraft.registry.RegistryKeys;
+import net.minecraft.util.Identifier;
+import net.minecraft.component.type.ConsumableComponents;
+
+public class CustomItem {
+  public static void registerItems() {
+    Learning.LOGGER.info("Registering Items...");
+  }
+
+  public static Item toast = register("toast", Toast::new, new Item.Settings().food(Foods.toastFood, ConsumableComponents.food().consumeSeconds(0.5f).build()));
+
+  private static Item register(String itemId) {
+    return register(itemId, new Item.Settings());
+  }
+
+  private static Item register(String itemId, Item.Settings settings) {
+    return register(itemId, Item::new, settings);
+  }
+  
+  private static Item register(String itemId, Function<Item.Settings, Item> factory, Item.Settings settings) {
+    RegistryKey<Item> key = keyOf(itemId);
+    return Registry.register(Registries.ITEM, key, factory.apply(settings.registryKey(key)));
+  }
+  private static RegistryKey<Item> keyOf(String itemId) {
+    return RegistryKey.of(RegistryKeys.ITEM, Identifier.of(Learning.MOD_ID, itemId));
+  }
+}

src/main/java/com/learning/item/Toast.java

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+package com.learning.item;
+
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+import net.minecraft.item.tooltip.TooltipType;
+import net.minecraft.text.Text;
+import net.minecraft.util.Formatting;
+import net.minecraft.client.gui.screen.Screen;
+
+import java.util.List;
+
+
+public class Toast extends Item {
+    public Toast(Item.Settings settings) {
+    super(settings);
+    }
+
+    @Override
+    public void appendTooltip(ItemStack stack, TooltipContext context, List<Text> tooltip, TooltipType type) {
+        super.appendTooltip(stack, context, tooltip, type);
+        tooltip.add(Text.translatable("toolTip.learning.toast0").formatted(Formatting.GRAY));
+        if (Screen.hasControlDown()) {
+            tooltip.add(Text.translatable("toolTip.learning.toast1"));
+        } else {
+            tooltip.add(Text.translatable("toolTip.learning.hold_control"));
+        }
+    }
+}

src/main/java/com/learning/itemgroup/CustomItemGroup.java

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+package com.learning.itemgroup;
+
+
+import com.learning.Learning;
+import com.learning.item.CustomItem;
+
+import net.fabricmc.fabric.api.itemgroup.v1.ItemGroupEvents;
+import net.minecraft.item.ItemGroup;
+import net.minecraft.item.ItemGroups;
+import net.minecraft.item.ItemStack;
+import net.minecraft.registry.Registries;
+import net.minecraft.registry.Registry;
+import net.minecraft.text.Text;
+import net.minecraft.util.Identifier;
+
+public class CustomItemGroup {
+  public static void registerItemGroup() {
+    Learning.LOGGER.info("Registering ItemGroup...");
+    Learning.LOGGER.info("Registering item into ItemGroups...");
+    ItemGroupEvents.modifyEntriesEvent(ItemGroups.FOOD_AND_DRINK).register(
+      register -> register.add(CustomItem.toast)
+    );
+  }
+
+  public static ItemGroup customItemGroup = register("custom_itemgroup", ItemGroup.create(null, -1)
+  .icon(() -> new ItemStack(CustomItem.toast))
+  .displayName(Text.translatable("itemGroup.learning.custom_itemgroup"))
+  .entries((displayContext, entries) -> {
+      entries.add(CustomItem.toast);
+    })
+  .build());
+
+  private static ItemGroup register(String groupId, ItemGroup itemGroup) {
+    return Registry.register(
+      Registries.ITEM_GROUP, 
+      Identifier.of(Learning.MOD_ID, groupId), 
+      itemGroup);
+  }
+}

src/main/java/com/learning/mixin/ExampleMixin.java

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+package com.learning.mixin;
+
+import net.minecraft.server.MinecraftServer;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(MinecraftServer.class)
+public class ExampleMixin {
+	@Inject(at = @At("HEAD"), method = "loadWorld")
+	private void init(CallbackInfo info) {
+		// This code is injected into the start of MinecraftServer.loadWorld()V
+	}
+}

src/main/resources/assets/learning/items/toast.json

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+{
+  "model": {
+    "type": "minecraft:model",
+    "model": "learning:item/toast"
+  }
+}

src/main/resources/assets/learning/lang/en_us.json

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+{
+    "item.learning.toast": "Toast",
+
+    "itemGroup.learning.custom_itemgroup": "My Dear...",
+
+    "toolTip.learning.toast0": "A simple fastfood.",
+    "toolTip.learning.toast1": "Will be tastier after baking in the furnace!",
+    "toolTip.learning.hold_control": "Hold §6Control §rto show more information."
+}

src/main/resources/assets/learning/models/item/toast.json

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+{
+    "parent": "item/generated",
+    "textures": {
+        "layer0": "learning:item/toast"
+    }
+}

src/main/resources/fabric.mod.json

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+{
+	"schemaVersion": 1,
+	"id": "learning",
+	"version": "${version}",
+	"name": "Learning",
+	"description": "This is an example description! Tell everyone what your mod is about!",
+	"authors": [
+		"Me!"
+	],
+	"contact": {
+		"homepage": "https://fabricmc.net/",
+		"sources": "https://github.com/FabricMC/fabric-example-mod"
+	},
+	"license": "CC0-1.0",
+	"icon": "assets/learning/icon.png",
+	"environment": "*",
+	"entrypoints": {
+		"main": [
+			"com.learning.Learning"
+		],
+		"fabric-datagen": [
+			"com.learning.LearningDataGenerator"
+		]
+	},
+	"mixins": [
+		"learning.mixins.json"
+	],
+	"depends": {
+		"fabricloader": ">=0.16.10",
+		"minecraft": "~1.21.4",
+		"java": ">=21",
+		"fabric-api": "*"
+	},
+	"suggests": {
+		"another-mod": "*"
+	}
+}

src/main/resources/learning.mixins.json

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+{
+	"required": true,
+	"package": "com.learning.mixin",
+	"compatibilityLevel": "JAVA_21",
+	"mixins": [
+		"ExampleMixin"
+	],
+	"injectors": {
+		"defaultRequire": 1
+	}
+}