JSON Reader and Object Storage

I have a JSON file with a bunch of objects in it with values that I need to read. How would I go about being able to read this file and access the values. I understand that I need to use GSON but here are my issues.
1. How do I register the file pathway because it does now like using the qualified name. Also is my JSON Reader created correctly?
 

public class GSONDamageResistanceReader 
{
	public static void Init()
	{
		String file = "/DungeonCraft/src/main/resources/data/dungeoncraft/tags/items/armor_damage_type_resistance_values.json"; //bad file path
		Gson gson = new GsonBuilder().create();
				
		try (Reader reader = new FileReader(file))
		{
			ArmorResistance armor = gson.fromJson(reader, ArmorResistance.class);
			
			System.out.println(armor);
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
	}
}

2. this is a sample of my JSON file to read and the values I need to get are the resistances. Would I need to store these objects in an array and then use my ArmorResistance class to set and get the values?

{
	"minecraft:leather_chestplate": 
	{
		"slashing_resistance" : 1,
		"piercing_resistance" : 1,
		"bludgeoning_resistance" : 1
	},

	"minecraft:leather_leggings": 
	{
		"slashing_resistance" : 1,
		"piercing_resistance" : 1,
		"bludgeoning_resistance" : 1
	}
}

Thanks in advance for the help. If you need anymore information let me know, been stuck on this for a while and cant find much else to help.