ExampleAddon.java

package me.CHANGEME.slimefunaddon;

import io.github.thebusybiscuit.slimefun4.libraries.dough.updater.GitHubBuildsUpdater;
import org.bukkit.Material;
import org.bukkit.NamespacedKey;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.java.JavaPlugin;

import io.github.thebusybiscuit.slimefun4.api.items.ItemGroup;
import io.github.thebusybiscuit.slimefun4.api.items.SlimefunItem;
import io.github.thebusybiscuit.slimefun4.api.items.SlimefunItemStack;
import io.github.thebusybiscuit.slimefun4.api.recipes.RecipeType;
import io.github.thebusybiscuit.slimefun4.api.SlimefunAddon;
import io.github.thebusybiscuit.slimefun4.libraries.dough.config.Config;
import io.github.thebusybiscuit.slimefun4.libraries.dough.items.CustomItemStack;

import java.io.File;

public class ExampleAddon extends JavaPlugin implements SlimefunAddon {

    @Override
    public void onEnable() {
        // Read something from your config.yml
        Config cfg = new Config(this);
        if (!new File(getDataFolder(), "config.yml").exists()) {
            saveDefaultConfig();
        }
        //Auto updater for https://thebusybiscuit.github.io/builds/
        if (getConfig().getBoolean("options.auto-update") && getDescription().getVersion().startsWith("DEV - ")) {
            new GitHubBuildsUpdater(this, getFile(), "CHANGEME/ExampleAddon/master").start();

        }

        /*
         * 1. Creating a new Category
         * This Category will use the following ItemStack
         */
        ItemStack itemGroupItem = new CustomItemStack(Material.DIAMOND, "&4Addon Category", "", "&a> Click to open");

        // Give your Category a unique id.
        NamespacedKey itemGroupId = new NamespacedKey(this, "addon_category");
        ItemGroup itemGroup = new ItemGroup(itemGroupId, itemGroupItem);

        /*
         * 2. Create a new SlimefunItemStack
         * This class has many constructors, it is very important
         * that you give each item a unique id.
         */
        SlimefunItemStack slimefunItem = new SlimefunItemStack("COOL_DIAMOND", Material.DIAMOND, "&4Cool Diamond", "&c+20% Coolness");

        /*
         * 3. Creating a Recipe
         * The Recipe is an ItemStack Array with a length of 9.
         * It represents a Shaped Recipe in a 3x3 crafting grid.
         * The machine in which this recipe is crafted in is specified
         * further down as the RecipeType.
         */
        ItemStack[] recipe = { new ItemStack(Material.EMERALD), null, new ItemStack(Material.EMERALD), null, new ItemStack(Material.DIAMOND), null, new ItemStack(Material.EMERALD), null, new ItemStack(Material.EMERALD) };

        /*
         * 4. Registering the Item
         * Now you just have to register the item.
         * RecipeType.ENHANCED_CRAFTING_TABLE refers to the machine in
         * which this item is crafted in.
         * Recipe Types from Slimefun itself will automatically add the recipe to that machine.
         */
        SlimefunItem item = new SlimefunItem(itemGroup, slimefunItem, RecipeType.ENHANCED_CRAFTING_TABLE, recipe);
        item.register(this);
    }

    @Override
    public void onDisable() {
        // Logic for disabling the plugin...
    }

    @Override
    public String getBugTrackerURL() {
        //adds a link for people to report any bugs/errors/issues to your addon's github page
        return "https://github.com/CHANGEME/ExampleAddon/issues";
    }

    @Override
    public JavaPlugin getJavaPlugin() {
        /*
         * You will need to return a reference to your Plugin here.
         * If you are using your main class for this, simply return "this".
         */
        return this;
    }

}