Evento CommandManager, sistema de top 10 comandos mais executados

CommandManager.java

package com.dont.commandmanager;

import java.util.ArrayList;
import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

import org.bukkit.Bukkit;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerCommandPreprocessEvent;
import org.bukkit.event.server.ServerCommandEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin implements CommandExecutor, Listener{

	private final HashMap<String, Integer> statistics = new HashMap<>();
	public void onEnable() {
		saveDefaultConfig();
		getCommand("topcommands").setExecutor(this);
		Bukkit.getPluginManager().registerEvents(this, this);
		for (String data : getConfig().getStringList("Data")) { // formato na config: /comando:quantidade
			String[] splittedData = data.split(":");
			statistics.put(splittedData[0], Integer.parseInt(splittedData[1]));
		}
	}
	
	public void onDisable() {
		getConfig().set("Data", statistics.entrySet().stream().map(entry -> entry.getKey()+":"+entry.getValue()).collect(Collectors.toList())); // salva as estatisticas com o formato de: /comando:quantidade
		saveConfig();
	}
	
	@EventHandler
	public void onCommand(PlayerCommandPreprocessEvent e) {
		String command = e.getMessage().contains(" ") ? e.getMessage().toLowerCase().split(" ")[0].trim() : e.getMessage().toLowerCase().trim(); // pega sempre o comando (caso tenha argumentos)
		statistics.put(command, statistics.getOrDefault(command, 0) + 1);
	}
	
	@EventHandler
	public void onCommand(ServerCommandEvent e) {
		String command = e.getCommand().contains(" ") ? e.getCommand().toLowerCase().split(" ")[0].trim() : e.getCommand().toLowerCase().trim(); // pega sempre o comando (caso tenha argumentos)
		command = "/" + command;
		statistics.put(command, statistics.getOrDefault(command, 0) + 1);
	}
	
	private final int TOP = 10;
	@Override
	public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
		LinkedHashMap<String, Integer> sorted = statistics.entrySet().stream()
				.sorted(Entry.comparingByValue(Comparator.reverseOrder()))
				.limit(TOP)
				.collect(Collectors.toMap(Entry::getKey, Entry::getValue, (cmd, qntd) -> {throw new IllegalStateException();}, LinkedHashMap::new));
		AtomicInteger i = new AtomicInteger(0);
		sender.sendMessage("");
		sender.sendMessage("§eTop comandos: ");
		sorted.forEach((cmd, qntd) -> {
			sender.sendMessage("§e"+i.incrementAndGet()+"º "+cmd+": §f"+qntd);
		});
		return false;
	}

}