Solved java.lang.IllegalAccessError ??? How do I fix?

Did some research and none of it made sense for my plugin and this errror, I hope someone with experience in this field can possibly help me out I have never seen this error before...

Code:

22:58:52 [SEVERE] Could not pass event BlockPlaceEvent to RCChestLimit v0.0.1
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:427)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:462)
        at org.bukkit.craftbukkit.v1_6_R2.event.CraftEventFactory.callBlockPlace
Event(CraftEventFactory.java:114)
        at net.minecraft.server.v1_6_R2.ItemBlock.processBlockPlace(ItemBlock.ja
va:89)
        at net.minecraft.server.v1_6_R2.ItemBlock.interactWith(ItemBlock.java:73
)
        at net.minecraft.server.v1_6_R2.ItemStack.placeItem(ItemStack.java:79)
        at net.minecraft.server.v1_6_R2.PlayerInteractManager.interact(PlayerInt
eractManager.java:389)
        at net.minecraft.server.v1_6_R2.PlayerConnection.a(PlayerConnection.java
:630)
        at net.minecraft.server.v1_6_R2.Packet15Place.handle(SourceFile:58)
        at net.minecraft.server.v1_6_R2.NetworkManager.b(NetworkManager.java:296
)
        at net.minecraft.server.v1_6_R2.PlayerConnection.e(PlayerConnection.java
:118)
        at net.minecraft.server.v1_6_R2.ServerConnection.b(SourceFile:37)
        at net.minecraft.server.v1_6_R2.DedicatedServerConnection.b(SourceFile:3
0)
        at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:5
90)
        at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:2
26)
        at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:4
86)
        at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java
:419)
        at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:5
82)
Caused by: java.lang.IllegalAccessError: tried to access field io.github.wreed12
345.TempPlayers.players from class io.github.wreed12345.RCChestLimit
        at io.github.wreed12345.RCChestLimit.placeBlock(RCChestLimit.java:95)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:425)
        ... 19 more
>

If you need to see any of the classes let me know.

I know this error comes up when trying to access fields you can not access, but everything in the class is public so I don't see why its not working

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

 

Can we see some code please?

 

My main class for the plugin:

Code:java

package io.github.wreed12345;
 
import java.io.File;
import java.util.ArrayList;
import java.util.List;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockPlaceEvent;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.java.JavaPlugin;
 
import com.sk89q.worldguard.bukkit.WorldGuardPlugin;
import com.sk89q.worldguard.protection.managers.RegionManager;
 
 
public class RCChestLimit extends JavaPlugin implements Listener {
 
    public WorldGuardPlugin getWorldGuard() {
        Plugin plugin = getServer().getPluginManager().getPlugin("WorldGuard");
 
        // WorldGuard may not be loaded
        if (plugin == null || !(plugin instanceof WorldGuardPlugin)) {
            return null; // Maybe you want throw an exception instead
        }
 
        return (WorldGuardPlugin) plugin;
    }
 
    /** @author William Reed */
 
    final String VERSION = "0.0.1 Beta";
    public WorldGuardPlugin wg;
    public RegionManager rm;
 
    @Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(this, this);
 
        wg = getWorldGuard();
        //change this name
 
 
        loadYAML();
 
        getLogger().info("RCChestLimit " + VERSION + " has been enabled!");
    }
 
    @Override
    public void onDisable() {
        saveYAML();
 
        getLogger().info("RCChestLimit  " + VERSION + " has been disabled");
    }
 
    public List<TempPlayers> players = new ArrayList<TempPlayers>();
 
    @EventHandler
    public void placeBlock(BlockPlaceEvent event) {
        rm = wg.getRegionManager(Bukkit.getServer().getWorld("world"));
        //first check if a chest was placed
        if (event.getBlock().getType().equals(Material.CHEST)) {
            System.out.println("chest placed");
            if (
                    rm.getRegion("wreed58")
                            .contains(
                    event.getBlock().getLocation().getBlockX(),
                    event.getBlock().getLocation().getBlockY(),
                    event.getBlock().getLocation().getBlockZ())) {
                System.out.println("chest in protected area");
 
                //check if player has placed chest there before
                if(chestData.getConfigurationSection("name").contains(event.getPlayer().getName())){
                    //check players count of chests. if > 2 cancel event.
                    if(chestData.getInt("name." + event.getPlayer().getName() + ".chests") > 2){
                        event.setCancelled(true);
                        event.getPlayer().sendMessage(ChatColor.RED + "You can not place more than two chests here");
                    }else{
                        chestData.set("name." + event.getPlayer().getName() + ".chests", 2);
                        //exit since they can clearly place another chest.
                        return;
                    }
                }else { //name doesnt exist in data, so create it
 
                    for (String s : chestData.getConfigurationSection("name").getKeys(false)) {
                        players.add(new TempPlayers(s, chestData.getInt("name." + s + ".chests")));
                    }
                    players.add(new TempPlayers(event.getPlayer().getName(), 1));
 
                    chestData.set("name", TempPlayers.players);
 
                    for(int i = 0; i < TempPlayers.players.size(); i++){
                        String player;
                        player = TempPlayers.players.get(i);
                        chestData.set("name." + player + ".chests", players.get(i).chest);
                    }
                    saveYAML();
 
                    //conserve ram
                    players.clear();
                    TempPlayers.players.clear();
                    TempPlayers.chests.clear();
                }
            }
        }
    }
 
    //LOWER COUNT IF THEY BREAK A CHEST
    public File file;
    public FileConfiguration chestData;
 
    void loadYAML() {
        file = new File(this.getDataFolder(), "chests.yml");
        if (!file.exists()) {
            try {
                file.getParentFile().mkdir();
                file.createNewFile();
                chestData = YamlConfiguration.loadConfiguration(file);
                chestData.set("name", "will");
                chestData.set("name.will.chests", 1);
                saveYAML();
                return;
            } catch (Exception e) {
                System.out.println("cant create chests.yml");
            }
        }
        chestData = YamlConfiguration.loadConfiguration(file);
    }
 
    void saveYAML() {
        try {
            chestData.save(file);
        } catch (Exception e) {
            System.out.println("OMGOMGOMG cant save chests.yml");
        }
    }
}
 

Code for the class where the error comes up

Code:java

package io.github.wreed12345;
 
import java.util.ArrayList;
import java.util.List;
 
public class TempPlayers {
 
    public static List<String> players = new ArrayList<String>();
    public static List<Integer> chests = new ArrayList<Integer>();
 
    public String player;
    public int chest;
 
    public TempPlayers(String player, int chest) {
        players.add(player);
        chests.add(chest);
 
        this.player = player;
        this.chest = chest;
    }
}
 

SnipsRevival

 

wreed12345
You are performing something called direct variable access. Although you have declared your variables to be public, which means that anyone can see your variable. However, using <ClassName>.<variable> is an attempt to get the value directly, which Java forbids. To correct, you must create an accessor method:

Code:java

public List<Integer> getChests()
{
return chests;
}

And in your code, you must use the method instead of the direct access.

[On a side note, <ClassName>.<Variable> only works if the variable is declared static, which means the variable is initialized once (class variable).]


Helpful link:
http://stackoverflow.com/questions/11498287/accessor-methods-in-java

 

both of those variables are declared as static? Both lists in that class are static ... collielimabean

 

Dang - didn't catch that. Sorry about that.

I'm not sure then - could be that you are trying to store something illegally through the configuration? I'm not familiar with the FileConfiguration API.

 

It sounds unlikely because i used this method almost exactly the same through another plugin I made collielimabean

Just confirmed that it has nothing to do with the FileConfiguration API. I created a new List<String> called names and performed this:

Code:java

names = TempPlayers.players;

And that is where the error comes up. This seems extremely odd

Well this is extremely weird but I created a new class called TemporaryPlayers and copied everything there from the TempPlayers class and it all works fine...

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