OnPlayerJoin Help

Here is my code:

Code:java

package me.zangoran.kobaltorange.smp;
 
import org.bukkit.Bukkit;
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 SMP extends JavaPlugin {
 
    public static boolean state = false;
 
    @Override
    public void onEnable() {
        getLogger().info("onEnable has been enabled!");
    }
 
    @Override
    public void onDisable() {
    }
 
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if (cmd.getName().equalsIgnoreCase("smp") && sender instanceof Player) {
            Player player = (Player) sender;
            if (!player.hasPermission("smp.toggle")) {
                player.sendMessage(ChatColor.RED + "You are not allowed to perform this command.");
                return true;
            } else if (args.length > 0) {
                if (args[0].equalsIgnoreCase("on")) {
                    SMP.state = true;
                    for (Player p : Bukkit.getServer().getOnlinePlayers()) {
                        if (!p.hasPermission("smp.bypass")) {
                            p.kickPlayer("Server is under maintenance!");
                            return true;
                            } else {
                            Bukkit.getLogger().info(ChatColor.RED + "[" + ChatColor.GOLD + "SMP" + ChatColor.RED + "]" + ChatColor.BLUE + " SMP has been turned" + ChatColor.DARK_GREEN + " ON");
                            p.sendMessage(ChatColor.RED + "[" + ChatColor.GOLD + "SMP" + ChatColor.RED + "]" + ChatColor.BLUE + " SMP has been turned" + ChatColor.DARK_GREEN + " ON");
                            }
                        }
                    }
 
                } else if (args[0].equalsIgnoreCase("off")) {
                    SMP.state = false;
                    for (Player p : Bukkit.getServer().getOnlinePlayers()) {
                        p.sendMessage(ChatColor.RED + "[" + ChatColor.GOLD + "SMP" + ChatColor.RED + "]" + ChatColor.BLUE + " SMP has been turned" + ChatColor.RED + " OFF");
                    }
                    return true;
                } else if (args[0].equalsIgnoreCase("reload")) {
                    if (player.hasPermission("smp.reload")) {
                        this.reloadConfig();
                        player.sendMessage(ChatColor.RED + "[" + ChatColor.GOLD + "SMP" + ChatColor.RED + "]" + ChatColor.DARK_RED + " Config reloaded!");
                        Bukkit.getLogger().info(ChatColor.RED + "[" + ChatColor.GOLD + "SMP" + ChatColor.RED + "]" + ChatColor.DARK_RED + " Config reloaded!");
                        return true;
                    }
                } else {
                    return false;
                }
            } else {
                return true;
            }
 
 
        return true;
    }
}

What I want it to do is when a player joins they get kicked right away. When I do /smp on it does nothing at all except say the chat notification. Also when I do it in the console it does nothing. And when I do /smp it gives me this:

Code:

[17:43:17 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'smp' in plugin SMP v1.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R0.1-2-g1e4
dcde-b3086jnks]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180) ~[craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R0.
1-2-g1e4dcde-b3086jnks]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.dispatchCommand(CraftServer.java:701) ~[craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-
1.7.9-R0.1-2-g1e4dcde-b3086jnks]
        at net.minecraft.server.v1_7_R3.PlayerConnection.handleCommand(PlayerConnection.java:956) [craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bu
kkit-1.7.9-R0.1-2-g1e4dcde-b3086jnks]
        at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:817) [craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R
0.1-2-g1e4dcde-b3086jnks]
        at net.minecraft.server.v1_7_R3.PacketPlayInChat.a(PacketPlayInChat.java:28) [craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R0
.1-2-g1e4dcde-b3086jnks]
        at net.minecraft.server.v1_7_R3.PacketPlayInChat.handle(PacketPlayInChat.java:47) [craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7
.9-R0.1-2-g1e4dcde-b3086jnks]
        at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:157) [craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R0.1-
2-g1e4dcde-b3086jnks]
        at net.minecraft.server.v1_7_R3.ServerConnection.c(SourceFile:134) [craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R0.1-2-g1e4d
cde-b3086jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:667) [craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R0.
1-2-g1e4dcde-b3086jnks]
        at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:260) [craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R0.
1-2-g1e4dcde-b3086jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:558) [craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R0.
1-2-g1e4dcde-b3086jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:469) [craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R
0.1-2-g1e4dcde-b3086jnks]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R0.
1-2-g1e4dcde-b3086jnks]
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
        at me.zangoran.kobaltorange.smp.SMP.onCommand(SMP.java:43) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit-1.7.9-R0.2-20140520.082451-2.jar:git-Bukkit-1.7.9-R0.1-2-g1e4
dcde-b3086jnks]
        ... 13 more

Could someone please help?

 

You're getting a null error because the args array is empty when you just type "/smp". Hence "Caused by: java.lang.ArrayIndexOutOfBoundsException: 0".

You might find it easier if you taught yourself some more Java and re-did the plugin tutorial

 

Locked. This topic is now being discussed here: http://forums.bukkit.org/threads/plugin-not-working.274788/