ForgeGradle

Exception message: java.lang.IllegalArgumentException: Duplicate registration jade you're registering "jade" twice, I think that should be the only thing wrong oh also, your enum constants should be all uppercased (it won't cause any errors of course, but it's the standard)  

Sure, i played around with the code a bit and added a ".get()" to the end of the material, this removed all errors. Except its wrong because now I launch and the game crashes, yet eclipse gives me no errors. Heres my list: package djofox.gemstones.materials; import java.util.function.Supplier; import djofox.gemstones.init.ItemInit; import net.minecraft.item.IItemTier; import net.minecraft.item.crafting.Ingredient; import net.minecraft.util.LazyValue; public enum ToolMaterialList implements IItemTier { beryl(0, 131, 15.0f, 2.75f, 30, () -> { return Ingredient.of(ItemInit.beryl.get()); }), jade(2, 500, 7.0f, 2.25f, 23, () -> { return Ingredient.of(ItemInit.jade.get()); }), moissanite(2, 500, 7.0f, 2.25f, 23, () -> { return Ingredient.of(ItemInit.moissanite.get()); }), kunzite(0, 315, 12f, 0.5f, 20, () -> { return Ingredient.of(ItemInit.kunzite.get()); }), orpiment(2, 258, 10f, 0.5f, 20, () -> { return Ingredient.of(ItemInit.orpiment.get()); }), mercurySulfide(2, 1012, 5.5f, 2.0f, 14, () -> { return Ingredient.of(ItemInit.mercurySulfide.get()); }), blackDiamond(3, 2757, 8.0f, 3.0f, 2, () -> { return Ingredient.of(ItemInit.blackDiamond.get()); }), treatedCarbide(4, 2560, 10.0f, 5.0f, 2, () -> { return Ingredient.of(ItemInit.siliconCarbide.get()); }); private final int level; private final int uses; private final float speed; private final float damage; private final int enchantmentValue; private final LazyValue<Ingredient> repairIngredient; private ToolMaterialList(int p_i48458_3_, int p_i48458_4_, float p_i48458_5_, float p_i48458_6_, int p_i48458_7_, Supplier<Ingredient> p_i48458_8_) { this.level = p_i48458_3_; this.uses = p_i48458_4_; this.speed = p_i48458_5_; this.damage = p_i48458_6_; this.enchantmentValue = p_i48458_7_; this.repairIngredient = new LazyValue<>(p_i48458_8_); } public int getUses() { return this.uses; } public float getSpeed() { return this.speed; } public float getAttackDamageBonus() { return this.damage; } public int getLevel() { return this.level; } public int getEnchantmentValue() { return this.enchantmentValue; } public Ingredient getRepairIngredient() { return this.repairIngredient.get(); } } Heres my init class which causes the crash (from taking other stuff) And heres the error I get when I crash (I dont know if you need it but better safe than sorry)  

can you show your ToolMaterialList?

Heres the full error  

Ohh ok, that makes sense, but even still how could I fix it? I cant initialize my items before I do my ToolMaterialList because my items class uses it.