File NullpointerException

Code:

File file = null;  

public void loadKit(Player player) {
      
        try {
        file = new File(plugin.getDataFolder(), player.getUniqueId().toString() + ".yml"); //Seems to be the problem here
        } catch (Exception e) {
            e.printStackTrace();
        }
      
        if(file.exists()) { //Problem also here
            new YamlConfiguration();
            YamlConfiguration inv = YamlConfiguration.loadConfiguration(file);
          
            if(!inv.contains("Inventory")) {
                player.sendMessage(ChatColor.RED + "Could not find a kit!");
                return;
            }
          
            ItemStack[] contents = player.getInventory().getContents();
            ItemStack[] armorContents = player.getInventory().getArmorContents();
          
            List<?> items = inv.getList("Inventory.items");
            List<?> armor = inv.getList("Inventory.armor");
          
            for(int i = 0; i < items.size(); i++) {
                contents[i] = (ItemStack) items.get(i);
            }
          
            for(int i = 0; i < armor.size(); i++) {
                armorContents[i] = (ItemStack) armor.get(i);
            }
          
            player.getInventory().clear();
            player.getInventory().setContents(contents);
            player.getInventory().setArmorContents(armorContents);
            player.updateInventory();
            player.sendMessage("Loaded your Kit!");
        } else {
          
            file = new File(plugin.getDataFolder(), "default.yml");
            YamlConfiguration inv = YamlConfiguration.loadConfiguration(file);
          
            ItemStack[] contents = player.getInventory().getContents();
            ItemStack[] armorContents = player.getInventory().getArmorContents();
          
            List<?> items = inv.getList("Inventory.items");
            List<?> armor = inv.getList("Inventory.armor");
          
            for(int i = 0; i < items.size(); i++) {
                contents[i] = (ItemStack) items.get(i);
            }
          
            for(int i = 0; i < armor.size(); i++) {
                armorContents[i] = (ItemStack) armor.get(i);
            }
          
            player.getInventory().clear();
            player.getInventory().setContents(contents);
            player.getInventory().setArmorContents(armorContents);
            player.updateInventory();
          
            player.sendMessage(ChatColor.RED + "Could not find a kit, loading default kit now!");
        }
    }

Not really sure what could be null. I have the file created in my dataFolder just to test out but I still get nullpointer. I'm pretty much using the exact code to save/load kits so I don't know whats wrong

 

@Irantwomiles
Is plugin null? If you try to get the DataFolder by itself, does it return a null file?

 

Hmm didn't try checking if datafolder is null. Give me a second.

EDIT: All of my problems lead up to when I try to initialize the file in my method.

Code:

 file = new File(plugin.getDataFolder(), player.getUniqueId().toString(); //This is the probelm, keeps giving me NPE

EDIT: Ok so I checked whether the plugin is null or not using this

Code:

 

Practice plugin; //Practice is my main class

if(plugin == null) { sysout("plugin is null"); } //and it returns that in console, how is my plugin null? All of the other classes work just fine.

 

@Irantwomiles
Show us where you set the value to the "plugin" variable.

 

I did, look one message up. That is in my global space of the class containing the method.

 

@Irantwomiles
Well, you never define the variable there, only initialize it, meaning it'll be null. You have to set it to your instance of the main class somehow.