Problemnn

package com.derffamily.main;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.OfflinePlayer;
import org.bukkit.entity.Player;
import org.bukkit.event.Event.Result;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.event.inventory.CraftItemEvent;
import org.bukkit.event.player.PlayerInteractAtEntityEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerLevelChangeEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.ShapelessRecipe;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scoreboard.DisplaySlot;
import org.bukkit.scoreboard.Objective;
import org.bukkit.scoreboard.Score;
import org.bukkit.scoreboard.Scoreboard;

public class Levelsystem extends JavaPlugin implements Listener {

        private static Scoreboard board;
        private static Objective o;
        private static Score s;



        static HashMap<OfflinePlayer, Score> scores = new HashMap<OfflinePlayer, Score>();

        static ItemStack craft_result = null;


    public void loadConfiguration(){





        this.getConfig().options().copyDefaults(true);

        this.saveConfig();
}




    public void onEnable() {



    	{



                /**
                 * Craft Result Information
                 */


        ItemStack sword1 = new ItemStack(Material.IRON_SWORD, 1);
        ItemMeta sm1 = sword1.getItemMeta();
        sm1.setDisplayName(ChatColor.GOLD + "Rusty Iron Sword");
        sm1.setLore(Arrays.asList(ChatColor.GREEN + "Your rusty ol' sword"));
        sword1.setItemMeta(sm1);
        sword1.setDurability((short) 128);
        ShapelessRecipe sword1r = new ShapelessRecipe(sword1);

       sword1r.addIngredient(Material.STICK);
       sword1r.addIngredient(Material.STICK);
       sword1r.addIngredient(Material.STICK);
       sword1r.addIngredient(Material.STICK);
       sword1r.addIngredient(Material.IRON_INGOT);

        ItemStack result = sword1r.getResult();

        craft_result=result;
        Bukkit.getServer().addRecipe(sword1r);

        }

        board = Bukkit.getServer().getScoreboardManager().getNewScoreboard();
        o = board.registerNewObjective("Stats", "dummy");
        o.setDisplayName(ChatColor.GOLD +"Player stats");
        o.setDisplaySlot(DisplaySlot.SIDEBAR);

        s = o.getScore(ChatColor.GREEN + "Level:");
        loadConfiguration();
        Bukkit.getServer().getPluginManager().registerEvents(this, this);

        this.getCommand("level").setExecutor(new LevelCommand(null));

        List<String> s = getConfig().getStringList("levels");
        for(String str : s) {

                String[] words = str.split(":");
                scores.put(Bukkit.getServer().getOfflinePlayer(words[0]), o.getScore( Bukkit.getServer().getOfflinePlayer(ChatColor.GREEN + "Level:")));
                scores.get(Bukkit.getServer().getOfflinePlayer(words[0])).setScore(Integer.parseInt(words[1]));

        }
        saveDefaultConfig();


    }

    public void onDisable() {
        List<String> s = getConfig().getStringList("levels");
        for(OfflinePlayer p : scores.keySet()) {

                s.add(p.getName() + ":" + scores.get(p).getScore());

        }
        getConfig().set("levels", s);
        saveConfig();
    }



    @EventHandler
    public void playerlevel(PlayerLevelChangeEvent e) {
        if(e.getNewLevel() - e.getOldLevel() == 1) {
          scores.get(e.getPlayer()).setScore(scores.get(e.getPlayer()).getScore() + 1);
        } else {
                return;
        }

    }

    @EventHandler
    public void playerJoinEvents(PlayerJoinEvent e) {

        Player p = e.getPlayer();

        p.setScoreboard(board);

        if(scores.get(p) == null) {
                scores.put(p, o.getScore( Bukkit.getServer().getOfflinePlayer(ChatColor.GREEN + "Level:")));

        } else {
                return;
        }


    }

    @EventHandler
   public void playerdeath(PlayerDeathEvent e) {
    	Player p = e.getEntity();
    	int score = scores.get(p).getScore();

    	if(p.isDead() && !p.hasPermission("level.bypass")) {
    		scores.get(p).setScore(0);
    	} else {
    		return;
    	}

    	System.out.println(prefix + "If you die you can lose levels (optional)");
    }



   // End of levels //






    String prefix = ChatColor.GOLD + "[" + ChatColor.WHITE +  ChatColor.BOLD +  "Level" + ChatColor.GOLD + "]";


   @EventHandler
   public void deny_crafting(CraftItemEvent e){
           Player p = (Player) e.getWhoClicked();

           if(craft_result!=null){
          if(e.getInventory().getResult().equals(craft_result)){
          if(scores.get(p)!=null){
              int score = scores.get(p).getScore();

              if(score<5){
                  e.setResult(Result.DENY);

                  ItemStack result = e.getInventory().getResult();
                  e.getInventory().remove(result);
                  /**
                   * Could be also e.setCancelled(true) not tested!
                   */

                  p.sendMessage("You need to be Level 5!");
              }
          }
           }
          }

           System.out.println(prefix + "No crafting if level != required level");
   }


  @EventHandler
   public void deny_use(PlayerInteractEvent e) {
	   Player p = e.getPlayer();
	   int score = scores.get(p).getScore();

	   if(e.getItem().equals(craft_result) && e.getMaterial().equals(Material.IRON_SWORD)) {
		   if(score < 5) {
		   e.setCancelled(true);
		   e.getPlayer().sendMessage(prefix + "Sorry! you're a too low level!");
		   } else if(score >= 5) {
			   return;
		   }
	   }


	   System.out.println(prefix + "Denying Player weapon usage if level != required level");

   }




        }



    // End class //