Changed Item to class. This required way more modifications than Liquids.

core/src/io/anuke/mindustry/resource/Item.java

@@ -1,16 +1,40 @@
 package io.anuke.mindustry.resource;
 
+import com.badlogic.gdx.utils.Array;
 import io.anuke.ucore.util.Bundles;
 
-public enum Item{
-	stone, iron, coal, steel, titanium, dirium, uranium;
+public class Item{
 
-	public String localized(){
-		return Bundles.get("item."+name() + ".name");
+	public static final Array<Item> items = new Array<>();
+
+	public static final Item stone = new Item("stone");
+	public static final Item iron = new Item("iron");
+	public static final Item coal = new Item("coal");
+	public static final Item steel = new Item("steel");
+	public static final Item titanium = new Item("titanium");
+	public static final Item dirium = new Item("dirium");
+	public static final Item uranium = new Item("uranium");
+
+	public final int id;
+	public final String name;
+
+	public Item(String name) {
+		this.id = items.size;
+		this.name = name;
+
+		Item.items.add(this);
+	}
+
+	public String localizedName(){
+		return Bundles.get("item." + this.name + ".name");
 	}
 
 	@Override
 	public String toString() {
-		return localized();
+		return localizedName();
+	}
+
+	public static Array<Item> getAllItems() {
+		return Item.items;
 	}
 }