Minecraft(Java版)で座標を表示するプラグイン

package com.comorichico.positiondisplay;

import org.bukkit.event.Listener;
import org.bukkit.plugin.java.JavaPlugin;
import net.kyori.adventure.text.Component;
import net.kyori.adventure.text.format.TextColor;
import org.bukkit.Bukkit;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.scoreboard.DisplaySlot;
import org.bukkit.scoreboard.Objective;
import org.bukkit.scoreboard.Scoreboard;
import org.bukkit.scoreboard.ScoreboardManager;

public class PositionDisplay extends JavaPlugin implements Listener{
    
    ScoreboardManager manager;
    Scoreboard board;
    Objective objective;
        
    @Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(this, this);
        manager = Bukkit.getScoreboardManager();
        board = manager.getMainScoreboard();
    }
    
    @EventHandler
    public void onPlayerMove(PlayerMoveEvent event) {
        
        Player player = event.getPlayer();
        String playerName = player.getName();
        
        if (board.getObjective(playerName) != null){
            board.getObjective(playerName).unregister();
        }
        
        String x = ((Integer)(int)player.getLocation().getX()).toString();
        String y = ((Integer)(int)player.getLocation().getY()).toString();
        String z = ((Integer)(int)player.getLocation().getZ()).toString();
        
        objective = board.registerNewObjective(playerName, playerName,Component.text(playerName));
        objective.displayName(Component.text("位置" + " X:" + x + " Y:" + y + " Z:" + z,TextColor.color(255, 255, 255)));
        objective.setDisplaySlot(DisplaySlot.SIDEBAR);
        
        objective.getScore("").setScore(0);
                
        player.setScoreboard(board);
    }
    
    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
        if(cmd.getName().equalsIgnoreCase("pos")){
            Player player = Bukkit.getPlayer(sender.getName());
            String x = ((Integer)(int)player.getLocation().getX()).toString();
            String y = ((Integer)(int)player.getLocation().getY()).toString();
            String z = ((Integer)(int)player.getLocation().getZ()).toString();
            getServer().broadcast(Component.text(player.getName() + "は" + " X:" + x + " Y:" + y + " Z:" + z + " の位置にいます。"));
            return true;
        } else {
            return false;
        }
    }
}