Solved Issue Reading Main Class

I am making a plugin for my server. Currently, I am having an with the server not being able to find certain files in my plugin. I am getting an error saying my main class is missing, but when I extracted it, It was there.

Code:

[17:47:48] [Server thread/ERROR]: Could not load 'plugins\LlamaEnvoys.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `com.agrocupcake.llamaenvoys.mainclass'
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:66) ~[ServerJarS.jar:git-Spigot-5391d73-0ebb9c7]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[ServerJarS.jar:git-Spigot-5391d73-0ebb9c7]
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[ServerJarS.jar:git-Spigot-5391d73-0ebb9c7]
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [ServerJarS.jar:git-Spigot-5391d73-0ebb9c7]
    at org.bukkit.craftbukkit.v1_10_R1.CraftServer.loadPlugins(CraftServer.java:297) [ServerJarS.jar:git-Spigot-5391d73-0ebb9c7]
    at net.minecraft.server.v1_10_R1.DedicatedServer.init(DedicatedServer.java:202) [ServerJarS.jar:git-Spigot-5391d73-0ebb9c7]
    at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:539) [ServerJarS.jar:git-Spigot-5391d73-0ebb9c7]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
Caused by: java.lang.ClassNotFoundException: com.agrocupcake.llamaenvoys.mainclass
    at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_91]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[ServerJarS.jar:git-Spigot-5391d73-0ebb9c7]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[ServerJarS.jar:git-Spigot-5391d73-0ebb9c7]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_91]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_91]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_91]
    at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_91]
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[ServerJarS.jar:git-Spigot-5391d73-0ebb9c7]
    ... 7 more
[17:47:49]

As I said my main Class exists.
My plugin.yml is:

Code:

name: LlamaEnvoys
version: 1.0
main: com.agrocupcake.llamaenvoys.mainclass
Author: AgroCupcake

commands:
  Envoy:
    description: Use This to View Envoy Timer
    usage: /envoy
  AddEnvoy:
    description: Adds an Envoy drop location where you are standing
    usage: /addenvoy

Any Help
-- AgroCupcake

 

is "mainclass" the name of the class that extends JavaPlugin?

 

Yes It is, mainclass.java

 

If the line says

Code:

public class mainclass {
}

Make it say

Code:

public class mainclass extends JavaPlugin {
}

The main class has to extend JavaPlugin for bukkit to recognize the class.

 

It aready does

 

Can you post the code of your main class?

 

Sure:

Code:

package com.agrocupcake.llamaenvoys;
import org.bukkit.command.CommandExecutor
import org.bukkit.command.PluginCommand
import org.bukkit.configuration.file.FileConfiguration
import org.bukkit.configuration.file.FileConfigurationOptions
import org.bukkit.plugin.PluginDescriptionFile
import org.bukkit.plugin.java.JavaPlugin



import com.agrocupcake.llamaenvoys.commands.EnvoyAddCoords;
import com.agrocupcake.llamaenvoys.commands.EnvoyMain;
import java.util.logging.Logger;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.PluginCommand;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.configuration.file.FileConfigurationOptions;
import org.bukkit.plugin.PluginDescriptionFile;
import org.bukkit.plugin.java.JavaPlugin;

public class mainclass extends JavaPlugin {
    public void onEnable() {
        PluginDescriptionFile descFile = this.getDescription();
        Logger logger = this.getLogger();
        logger.info(String.valueOf(descFile.getName()) + "Has Been Enabled (v: " + descFile.getVersion() + " )");
        this.getCommand("envoy").setExecutor((CommandExecutor)new EnvoyCommand(this));
        this.getCommand("addenvoy").setExecutor((CommandExecutor)new EnvoyAddCoords(this));
        this.registerConfig();
    }

    private void registerConfig() {
        this.getConfig().options().copyDefaults(true);
        this.saveConfig();
    }

    public void onDisable() {
        PluginDescriptionFile descFile = this.getDescription();
        Logger logger = this.getLogger();
        logger.info(String.valueOf(descFile.getName()) + "Has Been Disabled (v: " + descFile.getVersion() + " )");
    }
}

Hmm, now I am getting an error saying the package fragment root does not exist for mainclass.java when I am trying to export.


EDIT:
Fixed That, Now I can test, I will get back to you later

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

 

You don't have "@Override" above onEnable() and onDisable()... that may be the problem with it.

 

Nope, same error occured.

 

Try adding a line of space between the package and first imports.

Also, this isn't the reason for your error but the whole logger stuff in onEnable() and onDisable() is entirely unnecessary, bukkit does it automatically for you.

 

Please don't watch TheBcBroz to learn Bukkit... For instance here, there is no need for all that as bukkit allready shows the enable and disable messages in that format.

The only problem this could theoretically cause would be a method not being run from the subclass, but certainly not a ClassNotFoundException.

I dont see how that would help. The problem isnt that the code is not compiling, it is an exception thrown during runtime. a ClassNotFoundException pointing to the main class. A syntax change wouldnt do much. Also the line space between package and imports only changes the way you see it, not the way the compiler 'sees' the code. You could technically put everything on the same line and the compiler would be able to turn it into an actual program that runs.



@AgroCupcake
Please export the jar file to a directory as you do normally and then open the jar file with a Zip file opener such as WinRar or 7zip. Search for the class 'mainclass' in /com/agrocupcake/llamaenvoys/. Is it there?
Also please follow naming conventions.

 

I have done that many times, as it is the most logical answer; Yes It Is

Should I delete the onDisable code then?

 

Yes, currently you do not need it.

 

So, Now I am working on coding a part that places a chest at certain coordinates defined in the config.
I currently have this code:

Code:

        @EventHandler
       List<String> Envoys this.getConfig().getStringList("Envoys")
        for (String l : Envoys){
       public void onBlockPlace(BlockPlaceEvent event) {
            final Block block = event.getBlock();
            if(block.getType() == Material.CHEST){
                Chest chest = (Chest) event.getBlock().getState();
                Inventory chestinv = chest.getBlockInventory()

I am stuck trying to have the chest spawn at the locations defined.
Any Help?

EDIT: Just noticed when troubleshooting that my src folder is empty, is this an issue for bukkit by any chance?
EDIT#2: No more errors in console, it was that they were not in the src, Thanks!