In Need of Help Solving a Bug

Solved

Hello,
I've been developing a plugin for my server recently (mainly to test my knowledge, but it will also be of use on my server), and it works well, except from one bug:
When I run the command, it does what it's supposed to, but THEN tells the user that an internal error occurred.
It only happens on the command "/help", and there is "/help list" which works just fine without the error.

Main.java:

Code:

package me.jake.CustomHelp;

import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin {
    public void onEnable() {
        getLogger().info("Plugin Enabled!");
    }
    public void onDisable() {
        getLogger().info("Plugin Disabled!");
    }
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if (sender instanceof Player) {
            Player player = (Player) sender;
            // Default help page
            if(cmd.getName().equalsIgnoreCase("help")) {
                //player.sendMessage(ChatColor.DARK_GRAY + "[" + ChatColor.AQUA + "Help" + ChatColor.DARK_GRAY + "]" + ChatColor.GRAY + " This is your help guide. Here you can find help for many aspects of the game which you may be struggling with. There are " + ChatColor.AQUA + "many pages of help " + ChatColor.GRAY + "which you can access with the command: " + ChatColor.AQUA + "/help <page>" + ChatColor.GRAY + ". The pages are listed on /help list. Have fun and good luck! " );
                if (args.length == 0) { //Sender only typed '/hello' and nothing else
                    player.sendMessage(ChatColor.DARK_GRAY + "[" + ChatColor.AQUA + "Help" + ChatColor.DARK_GRAY + "]" + ChatColor.GRAY + " This is your help guide. Here you can find help for many aspects of the game which you may be struggling with. There are " + ChatColor.AQUA + "many pages of help " + ChatColor.GRAY + "which you can access with the command: " + ChatColor.AQUA + "/help <page>" + ChatColor.GRAY + ". The pages are listed on /help list. Have fun and good luck! " );
                }
                if (args[0].equalsIgnoreCase("list")) {
                    // If use sends /help list, send message below.
                    player.sendMessage(ChatColor.DARK_GRAY + "[" + ChatColor.AQUA + "Help" + ChatColor.DARK_GRAY + "]" + ChatColor.GRAY + " Help - List\n" + ChatColor.GRAY + " /help - Default help page\n/help list - Lists pages of help");
                }
                return true;
            }
          
            // UNWORKING
            //if(cmd.getName().equalsIgnoreCase("help list")) {
            //    player.sendMessage(ChatColor.DARK_GRAY + "[" + ChatColor.AQUA + "Help" + ChatColor.DARK_GRAY + "]" + ChatColor.GRAY + " /help - Default help page\n/help list - Lists pages of help");
            //}
          
        }
      
        return false;
    }


}

plugin.yml:

Code:

name: CustomHelp
author: Rocky_990
version: 1.1.2
description: Displays custom help.
main: me.jake.CustomHelp.Main
commands:
  help:
    description: Displays custom help main page.
  help list:
    description: Lists custom help pages.

Console when command is run:

Code:

[00:20:39] [Server thread/INFO]: Rocky_990 issued server command: /help
[00:20:39] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'help' in plugin CustomHelp v1.1.2
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180) ~[minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at org.bukkit.craftbukkit.v1_7_R3.CraftServer.dispatchCommand(CraftServer.java:701) ~[minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.PlayerConnection.handleCommand(PlayerConnection.java:956) [minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:817) [minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.PacketPlayInChat.a(PacketPlayInChat.java:28) [minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.PacketPlayInChat.handle(PacketPlayInChat.java:47) [minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:157) [minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.ServerConnection.c(SourceFile:134) [minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:667) [minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:260) [minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:558) [minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:469) [minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
at me.jake.CustomHelp.Main.onCommand(Main.java:25) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[minecraft_server.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]

Thanks a lot to anyone who tries to help remove the internal error; very much appreciated.

~Rocky_990 (Jake)

 

@Rocky_990

It's on line 25 of Main.java. Which in your original post is a }, so you must of copied it wrong.

 

@BrickBoy55 , thank you for your help although I'm still unsure on what's wrong with that? That is there due to the if statement...

 

That's the line your error is at.

Show line 25 in your Main class.

 

@BrickBoy55

Code:

if (args[0].equalsIgnoreCase("list")) {

 

Code:java

if (args.length == 0) { //Sender only typed '/hello' and nothing else
                    player.sendMessage(ChatColor.DARK_GRAY + "[" + ChatColor.AQUA + "Help" + ChatColor.DARK_GRAY + "]" + ChatColor.GRAY + " This is your help guide. Here you can find help for many aspects of the game which you may be struggling with. There are " + ChatColor.AQUA + "many pages of help " + ChatColor.GRAY + "which you can access with the command: " + ChatColor.AQUA + "/help <page>" + ChatColor.GRAY + ". The pages are listed on /help list. Have fun and good luck! " );
 
//Code continues because you didnt return true.
                }
                if (args[0] <-- ERROR because the args.length may be 0

 

@Rocky_990 This:

Code:

if (args[0].equalsIgnoreCase("list")) {

Should be an else if statement; only if the lines after the first if statement are not run do you want this bit to run.

 

@FisheyLP
Thanks a lot!! Fixed it.