Help me

package me.jack.Cryptex.core;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.GameMode;
import org.bukkit.Material;
import org.bukkit.Server;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Damageable;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.event.player.PlayerDropItemEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.event.player.PlayerRespawnEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.PlayerInventory;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;

public class Main
  extends JavaPlugin
  implements Listener
{

	 @EventHandler
	  public void onJoin(PlayerJoinEvent event)
	  {
	    Player p = event.getPlayer();



	    Bukkit.broadcastMessage(ChatColor.GREEN + "" + ChatColor.BOLD + "JOIN" + ChatColor.GRAY + " » " + ChatColor.GRAY + p.getName());
}

	 @EventHandler
	  public void onDeath(PlayerDeathEvent event)
	  {
	    Player p = event.getEntity();
	    event.getDrops().clear();
	    Player k = event.getEntity().getKiller();
	    Damageable d = k;
	    double hearts = d.getHealth();
	    hearts = Math.round(hearts) / 2L;
	    Player[] arrayOfPlayer;
	    int j = (arrayOfPlayer = Bukkit.getOnlinePlayers()).length;
	    for (int i = 0; i < j; i++)
	    {
	      Player person = arrayOfPlayer[i];
	      person.sendMessage(ChatColor.RED + "" + ChatColor.BOLD + "Cryptex" + ChatColor.GRAY + "»" + ChatColor.RED + k.getName() + ChatColor.AQUA + " killed you with " + ChatColor.GOLD + hearts + ChatColor.AQUA + " Heartz");



	    }



	    p.getInventory().clear();
	    p.getInventory().setArmorContents(null);
	    p.setFoodLevel(20);

	    k.sendMessage(ChatColor.RED + "" + ChatColor.BOLD + "Cryptex" + ChatColor.GRAY + "»" + ChatColor.GREEN + "You Killed " + ChatColor.RED + p.getName() + ChatColor.GREEN + " With " + ChatColor.GREEN + hearts + ChatColor.GREEN + " Heartz");

	  }

	 @EventHandler
	 public void onQuit(PlayerQuitEvent event)
	 {
	   Player p = event.getPlayer();
	  Bukkit.broadcastMessage(ChatColor.RED + "" + ChatColor.BOLD + "QUIT" + ChatColor.GRAY + " » " + ChatColor.GRAY + p.getName());

	 }


	 public boolean onCommand(CommandSender sender, Command cmd, String Label, String[] args)
	  {
	    Player p = (Player)sender;
	    if (cmd.getName().equalsIgnoreCase("apply")) {
	    	p.sendMessage(ChatColor.RED + "" + ChatColor.BOLD + "Cryptex" + ChatColor.GRAY + "»" + ChatColor.GOLD + " cryptex-factions.enjin.com ");

	    }
	    return true;
	  }}