Trying to get ArrayList from config.yml

I'm trying to get an ArrayList from config.yml and then send a message to the player that types in a command that gives the first value of the ArrayList, and there is definitely a value, but it gives me this:

Code:

[14:51:17 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'drink' in plugin DrinkCraft v0.0.1
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServer.java:740) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at net.minecraft.server.v1_7_R4.PlayerConnection.handleCommand(PlayerConnection.java:957) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:818) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at net.minecraft.server.v1_7_R4.PacketPlayInChat.a(PacketPlayInChat.java:28) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at net.minecraft.server.v1_7_R4.PacketPlayInChat.handle(PacketPlayInChat.java:47) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:157) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at net.minecraft.server.v1_7_R4.ServerConnection.c(SourceFile:134) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:667) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:258) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:558) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:469) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
Caused by: java.lang.NullPointerException
    at com.arwrock.main.Main.onCommand(Main.java:83) ~[?:?]
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.2-15-g66c314d-b3104jnks]
    ... 13 more

It says an internal error occured.
The config.yml:

Code:

Drinks:
  Beer:
    effect: '1'
    time: '120'

I want it to send me a message saying Beer to test out the ArrayList.

Here is my class:

Code:java

public class Main extends JavaPlugin implements Listener{
public String itemName;
public ItemStack potion = new ItemStack(Material.POTION,1);
public ItemMeta meta = potion.getItemMeta();
List<String> drinks;
 
public void onEnable(){
getServer().getPluginManager().registerEvents(this, this);
getLogger().info("Remember to check bukkit for the latest versions of DrinkCraft!");
File file = new File(getDataFolder() + File.separator + "config.yml");
 
 
if (!file.exists()){
 
getConfig().addDefault("Drinks.Beer.effect" , "1");
getConfig().addDefault("Drinks.Beer.time" , "120");//adding default settings
drinks = getConfig().getStringList("Drinks"); //Path Drinks>Beer>effect
 
//Save the default settings
getConfig().options().copyDefaults(true);
saveConfig();
} else {
CheckConfig();
saveConfig();
reloadConfig();
 
}
}
 
public void onDisable(){
 
}
 
public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args){
if(cmd.getName().equalsIgnoreCase("drink")){
if(args.length == 2){
if(args[0].equalsIgnoreCase("give")){
 
itemName = args[1];
if(sender instanceof Player){
if(sender.hasPermission("drinkcraft.give")){
meta.setDisplayName(itemName);
potion.setItemMeta(meta);
PlayerInventory inventory = ((Player) sender).getInventory();
inventory.addItem(potion);
sender.sendMessage(drinks.get(0));
return true;
 
}
}
else{
sender.sendMessage("You must be a player to execute this command.");
return false;
}
}
 
}
else{
sender.sendMessage("/drink list | Lists all drinks./drink give <number> | Gives you a certain drink.");
sender.sendMessage("/drink give <id> | Gives you the drink specified.");
sender.sendMessage("DrinkCraft made by Arwrock.");
 
return true;
}
 
}
 
return false;
}

Thanks and sorry for the long class to look through. Also, there are no visible errors in Eclipse.

 

A list is like this:

MyList:
- listItemOne
- listItemTwo
- listItemThree

so, what you're trying to get is not a list. If you'd like me to go in-depth on achieving what you need, I'll be glad to.

 

I have to go now, but how many spaces would there be to list stuff? just 1 between the - and the item? Thanks in advance.

 

[no spaces]listName:
[two spaces]-[one space]item
[two spaces]-[one space]item
[two spaces]-[one space]item

 

EDIT: This doesn't work. It always deletes the two spaces on reload. I have no config changing methods in my plugin either.

Actually on second thought, can you help me go about with a system where it says (for example):

Code:

Drinks:
  Beer:
      effects: 12, 1
      time: 120
  Vodka:
      effects: 12, 13, 10
      time: 150

Basically it collects all the names (Beer, Vodka), and then collects the effects and times, and then stores them into an ArrayList?
Thanks for your time!

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

arwrock
Loop through ConfigurationSection of Drinks.

 

Can you explain to me how that would work, maybe with code? I don't think that would work considering how nothing I've tried has worked. Thanks.

 

I'm giving you the code so please take in consideration how I'm doing this.

Code:

// Gets the configuration section path of "Drinks"
ConfigurationSection sect = config.getConfigurationSection("Drinks");
// Gets all of the keys from your current configuration section
// NOTE: These are only your drink names!
// the boolean represents if you want it to go in deeper,
// meaning go in deeper and find the other keys, such as effects and time
List<String> drinks = new ArrayList<>(sect.getKeys(false)); // I don't like sets
// We're going to loop through the drinks, and find the values.
for (int i = 0; i < drinks.size(); i++) {
    String drinkName = drinks.get(i);
    // Let's now access the configuration section of the drink itself.
    ConfigurationSection drinkSect = sect.getConfigurationSection(drinkName);
    // Do what else you need to now.
    String effects = drinkSect.getString("effects");
}

This code is from the top of my head, so I'm not 100% sure it works, but I'm 95% sure.