Make config with plugin prefix

This is my main

Code:

package me.tvhee.chatradius;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.CommandExecutor;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.plugin.java.JavaPlugin;

public class ChatRadiusClass extends JavaPlugin {

    FileConfiguration config = this.getConfig();
    String igprefix = config.getString("pluginprefix");
    String coloredString = ChatColor.translateAlternateColorCodes('&', igprefix);

    @Override
    public void onEnable()
        {
            Bukkit.getServer().getPluginManager().registerEvents(new ListenerClass(this), this);
            Bukkit.getServer().getPluginCommand("cr").setExecutor((CommandExecutor) new Commands(this));

            this.getConfig().addDefault("chatradius", 100);
            this.getConfig().addDefault("pluginprefix", "&7[&6ChatRadius&7] ");
            this.getConfig().options().copyDefaults(true);
            saveConfig();
            Settings.current_chat_radius = getConfig().getInt("chatradius");

            getLogger().info("has been enabeled!");
            getLogger().info("made by " + getDescription().getAuthors());
        }

    @Override
    public void onDisable()
    {
        getLogger().info("made by " + getDescription().getAuthors());
        getLogger().info("has been disabled!");
    }
}

Problem: & color codes aren't working

 

If i set it in the OnEnable then I get much errors

New: I changed my main and now I get an error by loading the plugin

Main (open) Main (close)

package me.tvhee.chatradius;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.CommandExecutor;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.plugin.java.JavaPlugin;

public class ChatRadiusClass extends JavaPlugin {

@Override

public void onEnable()
{
Bukkit.getServer().getPluginManager().registerEvents(new ListenerClass(this), this);
Bukkit.getServer().getPluginCommand("cr").setExecutor((CommandExecutor) new Commands(this));

this.getConfig().addDefault("chatradius", 100);
this.getConfig().addDefault("pluginprefix", "&7[&6ChatRadius&7] ");
this.getConfig().options().copyDefaults(true);
saveConfig();
Settings.current_chat_radius = getConfig().getInt("chatradius");

getLogger().info("has been enabeled!");
getLogger().info("made by " + getDescription().getAuthors());
}

FileConfiguration config = this.getConfig();
String prefix = config.getString("pluginprefix");
String igprefix = ChatColor.translateAlternateColorCodes('&', prefix);

@Override
public void onDisable()
{
getLogger().info("made by " + getDescription().getAuthors());
getLogger().info("has been disabled!");
}
}

Error (open) Error (close)

[17:29:03 ERROR]: Could not load 'plugins\ChatRadius 1.5.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.IllegalArgumentException: Cannot translate null text
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:141) ~[patched_1.16.1.jar:git-Paper-79]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:397) ~[patched_1.16.1.jar:git-Paper-79]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:305) ~[patched_1.16.1.jar:git-Paper-79]
at org.bukkit.craftbukkit.v1_16_R1.CraftServer.loadPlugins(CraftServer.java:388) ~[patched_1.16.1.jar:git-Paper-79]
at org.bukkit.craftbukkit.v1_16_R1.CraftServer.reload(CraftServer.java:930) ~[patched_1.16.1.jar:git-Paper-79]
at org.bukkit.Bukkit.reload(Bukkit.java:688) ~[patched_1.16.1.jar:git-Paper-79]
at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:54) ~[patched_1.16.1.jar:git-Paper-79]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[patched_1.16.1.jar:git-Paper-79]
at org.bukkit.craftbukkit.v1_16_R1.CraftServer.dispatchCommand(CraftServer.java:794) ~[patched_1.16.1.jar:git-Paper-79]
at org.bukkit.craftbukkit.v1_16_R1.CraftServer.dispatchServerCommand(CraftServer.java:756) ~[patched_1.16.1.jar:git-Paper-79]
at net.minecraft.server.v1_16_R1.DedicatedServer.handleCommandQueue(DedicatedServer.java:411) ~[patched_1.16.1.jar:git-Paper-79]
at net.minecraft.server.v1_16_R1.DedicatedServer.b(DedicatedServer.java:378) ~[patched_1.16.1.jar:git-Paper-79]
at net.minecraft.server.v1_16_R1.MinecraftServer.a(MinecraftServer.java:1212) ~[patched_1.16.1.jar:git-Paper-79]
at net.minecraft.server.v1_16_R1.MinecraftServer.v(MinecraftServer.java:1000) ~[patched_1.16.1.jar:git-Paper-79]
at net.minecraft.server.v1_16_R1.MinecraftServer.lambda$a$0(MinecraftServer.java:177) ~[patched_1.16.1.jar:git-Paper-79]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_261]
Caused by: java.lang.IllegalArgumentException: Cannot translate null text
at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[patched_1.16.1.jar:git-Paper-79]
at org.bukkit.ChatColor.translateAlternateColorCodes(ChatColor.java:354) ~[patched_1.16.1.jar:git-Paper-79]
at me.tvhee.chatradius.ChatRadiusClass.<init>(ChatRadiusClass.java:30) ~[?:?]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_261]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_261]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_261]
at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_261]
at java.lang.Class.newInstance(Unknown Source) ~[?:1.8.0_261]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:80) ~[patched_1.16.1.jar:git-Paper-79]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:137) ~[patched_1.16.1.jar:git-Paper-79]
... 15 more

Main:

Main (open) Main (close)

package me.tvhee.chatradius;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.CommandExecutor;
import org.bukkit.plugin.java.JavaPlugin;

public class ChatRadiusClass extends JavaPlugin {

String igprefix = getConfig().getString(ChatColor.translateAlternateColorCodes('&', "pluginprefix"));

@Override
public void onEnable()
{
Bukkit.getServer().getPluginManager().registerEvents(new ListenerClass(this), this);
Bukkit.getServer().getPluginCommand("cr").setExecutor((CommandExecutor) new Commands(this));

this.getConfig().addDefault("chatradius", 100);
this.getConfig().addDefault("pluginprefix", "&7[&6ChatRadius&7] ");
this.getConfig().options().copyDefaults(true);
saveConfig();
Settings.current_chat_radius = getConfig().getInt("chatradius");
Settings.current_igprefix = getConfig().getString("pluginprefix");


getLogger().info("has been enabeled!");
getLogger().info("made by " + getDescription().getAuthors());
}
@Override
public void onDisable()
{
getLogger().info("made by " + getDescription().getAuthors());
getLogger().info("has been disabled!");
}
}

Now I see this in game: &7[&6ChatRadius&7], When I use the § I get an error

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

 

Okay I think I can solve this today and you mean my Java code need between [code.] blocks?[/code.]