Solved ListPlus Help ~ Adding to Lists and Printing

Hello, So here is my error, I go to run my command, and I get this error.

Code:

Unexpected exception while parsing console command "listplus:list"
org.bukkit.command.CommandException: Unhandled exception executing command 'listplus:list' in plugin ListPlus v1.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit-1.8.8.jar:git-Bukkit-18fbb24]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[craftbukkit-1.8.8.jar:git-Bukkit-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:620) ~[craftbukkit-1.8.8.jar:git-Bukkit-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:606) [craftbukkit-1.8.8.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:372) [craftbukkit-1.8.8.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:336) [craftbukkit-1.8.8.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:629) [craftbukkit-1.8.8.jar:git-Bukkit-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:537) [craftbukkit-1.8.8.jar:git-Bukkit-18fbb24]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_131]
Caused by: java.lang.UnsupportedOperationException
        at java.util.AbstractList.add(Unknown Source) ~[?:1.8.0_131]
        at java.util.AbstractList.add(Unknown Source) ~[?:1.8.0_131]
        at me.s1ant.listplus.listCommand.onCommand(listCommand.java:23) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit-1.8.8.jar:git-Bukkit-18fbb24]
        ... 8 more

Here is my Code: I will specify Line 23 for you too:

Code:java

package me.s1ant.listplus;
 
import java.util.Arrays;
import java.util.List;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
 
public class listCommand implements CommandExecutor{
 
    List<String> owners = Arrays.asList();
    List<String> staff = Arrays.asList();
 
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args){
        if(cmd.getName().equalsIgnoreCase("list")){
        for(Player p : Bukkit.getOnlinePlayers()){
            sender.sendMessage(ChatColor.RED + "ListPlus ~ By S1ant" + ChatColor.GRAY + "");
            if(p.hasPermission("listplus.owner")){
                owners.add(p.getPlayerListName());
                sender.sendMessage(ChatColor.DARK_GRAY + "Owner(s):");
                sender.sendMessage(ChatColor.RED + owners.toString());
            }else if(p.hasPermission("listplus.staff")){
                staff.add(p.getPlayerListName() + ", ");
                sender.sendMessage(ChatColor.DARK_GRAY + "Staff:");
                sender.sendMessage(ChatColor.RED + staff.toString());
            }else {
                sender.sendMessage(ChatColor.DARK_RED + "There is noone online to broadcasst to you.");
            }
        }
 
 
 
        }
 
        return true;
    }
 
}

 

@timtower When I do that where do I set the name of the ArrayList?

Edit: Ok now that I use my brain nvm

 

If your problem has been resolved, please mark your thread 'solved' in thread tools.

 

Ok So Here is what happens when I give both my alt and me listplus.staff



I was about to post this then my Computer shut down, Sorry!

 

Thank you to everyone who Helped! I have now Published this plugin on Spigot! https://www.spigotmc.org/resources/listplus.41586