package info.u_team.u_team_core.item.armor;

import info.u_team.u_team_core.util.ItemProperties;
import net.minecraft.item.*;
import net.minecraft.item.Item.Properties;

public class ArmorSetCreator {
	
	public static ArmorSet create(String name, Properties properties, IArmorMaterial material) {
		return create(name, null, properties, material);
	}
	
	public static ArmorSet create(String name, ItemGroup group, Properties properties, IArmorMaterial material) {
		return new ArmorSet(new UHelmetItem(name, group, new ItemProperties(properties), material), new UChestplateItem(name, group, new ItemProperties(properties), material), new ULeggingsItem(name, group, new ItemProperties(properties), material), new UBootsItem(name, group, new ItemProperties(properties), material));
	}
}

package info.u_team.u_team_core.item.armor;

import info.u_team.u_team_core.util.ItemProperties;
import net.minecraft.item.*;
import net.minecraft.item.Item.Properties;
import net.minecraftforge.fml.RegistryObject;
import net.minecraftforge.registries.DeferredRegister;

public class ArmorSetCreator {
	
	public static ArmorSet create(DeferredRegister<Item> register, String name, Properties properties, IArmorMaterial material) {
		return create(register, name, null, properties, material);
	}
	
	public static ArmorSet create(DeferredRegister<Item> register, String name, ItemGroup group, Properties properties, IArmorMaterial material) {
		final RegistryObject<UHelmetItem> helmet = register.register(name + "_helmet", () -> new UHelmetItem(name, group, new ItemProperties(properties), material));
		final RegistryObject<UChestplateItem> chestplate = register.register(name + "_chestplate", () -> new UChestplateItem(name, group, new ItemProperties(properties), material));
		final RegistryObject<ULeggingsItem> leggings = register.register(name + "_leggings", () -> new ULeggingsItem(name, group, new ItemProperties(properties), material));
		final RegistryObject<UBootsItem> boots = register.register(name + "_boots", () -> new UBootsItem(name, group, new ItemProperties(properties), material));
		
		return new ArmorSet(helmet, chestplate, leggings, boots);
	}
}

Update armor set with new register
Update armor set with new register