Development Assistance Problem with Minigame Plugin

Hello, I'm trying to make a minigame plugin. I made an own Minigame class with some functions. Here is my code.

Code:

public class Minigame {
  
    private String name;
    private List<String> description;
    private String command;
    private List<String> aliases;
  
    public Minigame(String name, List<String> description, String command, List<String> aliases) {
        this.name = name;
        this.description = description;
        this.command = command;
        this.aliases = aliases;
    }
  
    public static ArrayList<Minigame> getMinigames() {
        ArrayList<Minigame> minigames = new ArrayList<Minigame>();
        minigames.add(new Minigame("test", Arrays.asList("descr", "iption"), "command", Arrays.asList("alias", "alias2")));
        return minigames;
      
    }
  
  
  
    public String getName() {
        return name;
    }
  
    public List<String> getDescription() {
        return description;
    }
  
    public String getCommand() {
        return command;
    }
  
    public List<String> getAliases() {
        return aliases;
    }
  
    public List<String> getCommandAndAliases() {
        List<String> caa = getAliases();
        caa.add(getCommand());
        return caa;
    }
  
    public static Minigame getMinigame(String name) {
        for(int i = 0; i < getMinigames().size(); i++) {
            if (getMinigames().get(i).getName().equals(name)) {
                return getMinigames().get(i);
            }
        }
        return null;
    }


}

But now, when I try to use the "getCommandAndAliases()" function I get this error:

Code:

org.bukkit.command.CommandException: Unhandled exception executing command 'comm
and' in plugin TheGordiansMinigames v1.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spi
got-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:14
1) ~[spigot-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at org.bukkit.craftbukkit.v1_8_R2.CraftServer.dispatchCommand(CraftServe
r.java:646) ~[spigot-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.PlayerConnection.handleCommand(PlayerCon
nection.java:1139) [spigot-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java
:974) [spigot-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(PacketPlayInChat.java
:45) [spigot-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(PacketPlayInChat.java
:1) [spigot-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:1
3) [spigot-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_45]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_45]
        at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [spigot-1.8
.3.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:7
12) [spigot-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:3
68) [spigot-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:6
51) [spigot-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java
:554) [spigot-1.8.3.jar:git-Spigot-870264a-0a645a2]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_45]
Caused by: java.lang.UnsupportedOperationException
        at java.util.AbstractList.add(Unknown Source) ~[?:1.8.0_45]
        at java.util.AbstractList.add(Unknown Source) ~[?:1.8.0_45]
        at com.thegordians.minigames.Minigame.getCommandAndAliases(Minigame.java
:51) ~[?:?]
        at com.thegordians.minigames.TCommandExecutor.onCommand(TCommandExecutor
.java:19) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spi
got-1.8.3.jar:git-Spigot-870264a-0a645a2]

I tried a few things, but nothing helps. Please help me.

 

@Zekrom2802
I think I may know what your problem is, do you use Arrays.asList anywhere? Because Arrays.asList returns a list with a size that cannot be changed, so you cannot add values.

EDIT:
If you are using

Code:

Arrays.asList(T...);

anywhere, simply add the following class to your project:

Code:

/**
* The MIT License (MIT)
*
* Copyright (c) 2015 [email protected]
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to permit
* persons to whom the Software is furnished to do so, subject to the
* following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
* NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package fake.package.name.put.yours.here;

import java.util.ArrayList;
import java.util.List;

public class ListUtil {
    @SafeVarargs
    /**
     * This method has the same effect as {@code Arrays.asList(T... values)} however, this method does not return a fixed-size list, but rather a fully mutable ArrayList.
     * @param values The values of the list.
     * @return The build list.
     */
    public static <T> List<T> buildList(T... values) {
        List<T> toReturn = new ArrayList<T>();
        for (T obj : values) {
            toReturn.add(obj);
        }
        return toReturn;
    }
}

and replace all calls to "Arrays.asList()" with ListUtil.BuildList().

 

Hello, sorry that I didn't answered yet. Your solution kinda worked, but now I get a new error:

Code:

        at java.lang.Thread.run(Unknown Source) [?:1.8.0_45]
Caused by: java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
        at java.util.ArrayList.rangeCheck(Unknown Source) ~[?:1.8.0_45]
        at java.util.ArrayList.get(Unknown Source) ~[?:1.8.0_45]