Development Assistance [Help] Getting a list of items from a config, and using it in an Inventory.

Hello, I was making this plugin, and I'm having this problem of getting a list of items from the config.yml file, and then using that data to open an inventory when right clicking a specific sign. If anyone could help me I'd really appreciate it. Thank you, and have a nice day.

Main Class:

Code:java

package me.Ricecutter0.RandomRewards;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.plugin.java.JavaPlugin;
 
public class Main extends JavaPlugin {
    public static Main plugin;
 
    ConfigManager cm = ConfigManager.getInstance();
 
 
    String prefix = color("&8[&3RandomRewards&8]");
 
    @Override
    public void onEnable()
    {
        ConfigManager.setup(this);
        Bukkit.getPluginManager().registerEvents(new Rewards(), this);
        Bukkit.getPluginManager().registerEvents(new SignPlacement(), this);
 
    }
 
    @Override
    public void onDisable()
    {
 
 
    }
 
    public static String color(String str){
        return str.replaceAll("&(?=[0-9a-fA-F])", Character.toString(ChatColor.COLOR_CHAR));
    }
 
}

Listener Class:

Code:java

package me.Ricecutter0.RandomRewards;
 
 
 
import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.block.Sign;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.player.PlayerInteractEvent;
 
 
public class Rewards implements Listener{
 
    public static FileConfiguration config;
 
    ConfigManager cm = ConfigManager.getInstance();
 
    CommandManager cmm = CommandManager.getInstance();
 
 
 
 
    @EventHandler
    public void onPlayerInteract(PlayerInteractEvent e){
 
        Player p = e.getPlayer();
 
        Action a = e.getAction();
 
        Block b = e.getClickedBlock();
 
        if(a.equals(Action.RIGHT_CLICK_BLOCK)){
 
            if(b.getType() == Material.SIGN_POST || b.getType() == Material.WALL_SIGN){
 
                Sign sign = (Sign) b.getState();
 
                String[] lines = sign.getLines();
 
                if(lines[0].equals(Main.color("&1[Reward]"))){
 
                    if(!(p.hasPermission("random.open"))){
                        return;
                    }
 
                        cmm.openInv(p);
                    }
                }
 
            }
        }
 
 
 
}

Inventory Class:

Code:java

package me.Ricecutter0.RandomRewards;
 
import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
 
public class CommandManager implements Listener {
 
 
    Main plugin;
 
    private CommandManager() {}
 
    static CommandManager instance = new CommandManager();
 
    public static CommandManager getInstance(){
        return instance;
    }
 
    ConfigManager cm = ConfigManager.getInstance();
 
    FileConfiguration cmg = cm.getConfig();
 
    public void openInv(Player p){
        ItemStack item = new ItemStack(Material.DIRT, 1);
        Inventory inv = Bukkit.createInventory(null, cmg.getInt("inventorySize"), Main.color("&4Reward"));
        inv.addItem(item);
        p.openInventory(inv);
 
 
 
 
    }
}

 

@Ricecutter0 First of all, a minor note: A better thing to type in for color() would be ChatColor.translateAlternateColorCodes('&',str);
And you have not actually provided us with the class that should create the inventory.

 

Oops. Added the class

 

@Ricecutter0 Oh I see, you just need code.
You can literally just save a list of itemstacks to the config, and use getList() to get them again, just use a cast to List<ItemStack>.

 

Okay.