Need help - PlayerDropItemEvent

Download Link
https://www.spigotmc.org/resources/social-jump.21466/

Could not pass event PlayerDropItemEvent to SocialJump v1.3
org.bukkit.event.EventException

Compiled in 1.8 for version 1.9.4

Spoiler: Listeners.java

Code (Text):

package me.socialclubz.com;


import java.util.ArrayList;
import java.util.HashMap;
import org.bukkit.Bukkit;
import org.bukkit.Effect;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.Server;
import org.bukkit.Sound;
import org.bukkit.World;
import org.bukkit.block.Block;
import org.bukkit.block.BlockState;
import org.bukkit.block.Sign;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Item;
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.block.BlockBreakEvent;
import org.bukkit.event.block.BlockPlaceEvent;
import org.bukkit.event.entity.EntityDamageEvent;
import org.bukkit.event.entity.FoodLevelChangeEvent;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.event.player.PlayerCommandPreprocessEvent;
import org.bukkit.event.player.PlayerDropItemEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.event.player.PlayerPickupItemEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.InventoryView;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.PlayerInventory;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.PluginManager;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;
import org.bukkit.util.Vector;

public class Listeners
  implements Listener
{
  private SocialJump plugin;
  public String prefix = "[SocialJump] ";
  public String noperm = SocialJump.m7;
  public String help = "For Help: /SocialJump help";

  public Listeners(SocialJump SocialJump)
  {
    this.plugin = SocialJump;
    this.plugin.getServer().getPluginManager().registerEvents(this, this.plugin);
  }

  @EventHandler
  public void onFeed(FoodLevelChangeEvent e)
  {
    if ((e.getEntity() instanceof Player))
    {
      Player p = (Player)e.getEntity();
      if (this.plugin.InGame.contains(p.getName())) {
        e.setCancelled(true);
      }
    }
  }

  @EventHandler
  public void ItemPickup(PlayerPickupItemEvent e)
  {
    if (this.plugin.InGame.contains(e.getPlayer().getName())) {
      e.setCancelled(true);
    }
  }

  @EventHandler
  public void ItemDrop(PlayerDropItemEvent e)
  {
    if (this.plugin.InGame.contains(e.getPlayer().getName())) {
      e.setCancelled(true);
    }
  }

  @EventHandler
  public void CommandsDeny(PlayerCommandPreprocessEvent e)
  {
    if ((this.plugin.InGame.contains(e.getPlayer().getName())) &&
      (!e.getMessage().contains("/socialjump")))
    {
      e.setCancelled(true);
      e.getPlayer().sendMessage(this.plugin.prefix + SocialJump.m8);
    }
  }

  @EventHandler
  public void PlayerDeny(EntityDamageEvent e)
  {
    if ((e.getEntity() instanceof Player))
    {
      Player p = (Player)e.getEntity();
      if (this.plugin.InGame.contains(p.getName())) {
        e.setCancelled(true);
      }
    }
  }

  @EventHandler
  public void onQuit(PlayerQuitEvent e)
  {
    this.plugin.leaveArena(e.getPlayer());
  }

  @EventHandler
  public void onBlockBreak(BlockBreakEvent e)
  {
    if (this.plugin.InGame.contains(e.getPlayer().getName())) {
      e.setCancelled(true);
    }
  }

  @EventHandler
  public void BlockPlace(BlockPlaceEvent e)
  {
    if (this.plugin.InGame.contains(e.getPlayer().getName())) {
      e.setCancelled(true);
    }
  }

  @EventHandler
  public void onDamage(EntityDamageEvent e)
  {
    if ((e.getEntity() instanceof Player))
    {
      Player p = (Player)e.getEntity();
      if (this.plugin.InGame.contains(p.getName())) {
        e.setCancelled(true);
      }
    }
  }

  @EventHandler
  public void PlayerMove(PlayerMoveEvent e)
  {
    if (this.plugin.InGame.contains(e.getPlayer().getName()))
    {
      Player p = e.getPlayer();
      Block b = p.getLocation().subtract(0.0D, 1.0D, 0.0D).getBlock();
      if (b.getType() == Material.SEA_LANTERN)
      {
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 100.0F, 500.0F);
        p.addPotionEffect(new PotionEffect(PotionEffectType.BLINDNESS, 100, 10));
      }
      if (b.getType() == Material.DIAMOND_BLOCK)
      {
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 100.0F, 500.0F);
        p.addPotionEffect(new PotionEffect(PotionEffectType.BLINDNESS, 2500, 10));
      }
      if (b.getType() == Material.SAND)
      {
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 100.0F, 500.0F);
        p.addPotionEffect(new PotionEffect(PotionEffectType.CONFUSION, 100, 10));
      }
      if (b.getType() == Material.SOUL_SAND)
      {
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 100.0F, 500.0F);
        p.addPotionEffect(new PotionEffect(PotionEffectType.CONFUSION, 600, 10));
      }
      if (b.getType() == Material.OBSIDIAN) {
        teleportToSpawn(p);
      }
      if (b.getType() == Material.STATIONARY_WATER) {
        teleportToSpawn(p);
      }
      if (b.getType() == Material.STATIONARY_LAVA) {
        teleportToSpawn(p);
      }
      if (b.getType() == Material.EMERALD_ORE)
      {
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 3.0F, 3.0F);
        p.addPotionEffect(new PotionEffect(PotionEffectType.SPEED, 80, 2));
      }
      if (b.getType() == Material.EMERALD_BLOCK)
      {
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 3.0F, 3.0F);
        p.addPotionEffect(new PotionEffect(PotionEffectType.SPEED, 80, 10));
      }
      if (b.getType() == Material.BEDROCK)
      {
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 3.0F, 3.0F);
        p.removePotionEffect(PotionEffectType.REGENERATION);
        p.removePotionEffect(PotionEffectType.SPEED);
        p.removePotionEffect(PotionEffectType.FIRE_RESISTANCE);
        p.removePotionEffect(PotionEffectType.POISON);
        p.removePotionEffect(PotionEffectType.HEALTH_BOOST);
        p.removePotionEffect(PotionEffectType.NIGHT_VISION);
        p.removePotionEffect(PotionEffectType.WEAKNESS);
        p.removePotionEffect(PotionEffectType.INCREASE_DAMAGE);
        p.removePotionEffect(PotionEffectType.SLOW);
        p.removePotionEffect(PotionEffectType.JUMP);
        p.removePotionEffect(PotionEffectType.HARM);
        p.removePotionEffect(PotionEffectType.WATER_BREATHING);
        p.removePotionEffect(PotionEffectType.INVISIBILITY);
        p.removePotionEffect(PotionEffectType.ABSORPTION);
        p.removePotionEffect(PotionEffectType.BLINDNESS);
        p.removePotionEffect(PotionEffectType.CONFUSION);
        p.removePotionEffect(PotionEffectType.FAST_DIGGING);
        p.removePotionEffect(PotionEffectType.HUNGER);
        p.removePotionEffect(PotionEffectType.SATURATION);
        p.removePotionEffect(PotionEffectType.SLOW_DIGGING);
        p.removePotionEffect(PotionEffectType.WITHER);
      }
      if (b.getType() == Material.BEACON)
      {
        this.plugin.InGame.remove(p.getName());
     
        p.getInventory().clear();
        ItemStack[] old = (ItemStack[])this.plugin.oldItems.get(p.getName());
        p.getInventory().setContents(old);
        p.updateInventory();
     
        Location loc = (Location)this.plugin.oldLoc.get(p.getName());
        p.teleport(loc);
     
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 3.0F, 2.0F);
        p.playEffect(p.getLocation(), Effect.FIREWORKS_SPARK, 1);
        p.sendMessage(this.plugin.prefix + SocialJump.m9);
        p.performCommand("socialjumpmenu");
      }
      if ((p.getLocation().getBlock().getType() == Material.AIR) &&
        (p.getLocation().subtract(0.0D, 1.0D, 0.0D).getBlock().getType() == Material.IRON_BLOCK))
      {
        Vector v = p.getLocation().getDirection().multiply(3.0D).setY(0.8D);
        p.setVelocity(v);
        p.getWorld().playEffect(p.getLocation().add(0.0D, 0.0D, 0.0D), Effect.INSTANT_SPELL, 1);
        p.getWorld().playEffect(p.getLocation().add(0.0D, 0.5D, 0.0D), Effect.INSTANT_SPELL, 1);
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 500.0F, 500.0F);
        p.getWorld().playEffect(p.getLocation().add(0.0D, 1.5D, 0.0D), Effect.INSTANT_SPELL, 1);
        p.getWorld().playEffect(p.getLocation().add(0.0D, 2.0D, 0.0D), Effect.INSTANT_SPELL, 1);
      }
      if ((p.getLocation().getBlock().getType() == Material.AIR) &&
        (p.getLocation().subtract(0.0D, 1.0D, 0.0D).getBlock().getType() == Material.SLIME_BLOCK))
      {
        Vector v2 = p.getLocation().getDirection().multiply(0.0D).setY(1.0D);
        p.setVelocity(v2);
        p.getWorld().playEffect(p.getLocation().add(0.0D, 0.0D, 0.0D), Effect.COLOURED_DUST, 1);
        p.getWorld().playEffect(p.getLocation().add(0.0D, 0.5D, 0.0D), Effect.COLOURED_DUST, 1);
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 500.0F, 500.0F);
        p.getWorld().playEffect(p.getLocation().add(0.0D, 1.5D, 0.0D), Effect.COLOURED_DUST, 1);
        p.getWorld().playEffect(p.getLocation().add(0.0D, 2.0D, 0.0D), Effect.COLOURED_DUST, 1);
      }
      if (b.getType() == Material.LAPIS_BLOCK)
      {
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 3.0F, 3.0F);
        p.addPotionEffect(new PotionEffect(PotionEffectType.SLOW, 80, 2));
      }
      if (b.getType() == Material.PACKED_ICE)
      {
        p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 3.0F, 3.0F);
        p.addPotionEffect(new PotionEffect(PotionEffectType.SLOW, 1000, 2));
      }
    }
  }

  @EventHandler
  public void onDrop(PlayerDropItemEvent e)
  {
    if (e.getItemDrop() == null) {
      return;
    }
    if (e.getItemDrop().getItemStack().getItemMeta().getDisplayName().equalsIgnoreCase(SocialJump.m14)) {
      e.setCancelled(true);
    }
  }

  @EventHandler
  public void teleportToSpawn(Player p)
  {
    FileConfiguration cfg = this.plugin.getConfig();
 
    String world = cfg.getString("Start.World");
    double x = cfg.getDouble("Start.PosX");
    double y = cfg.getDouble("Start.PosY");
    double z = cfg.getDouble("Start.PosZ");
    double yaw = cfg.getDouble("Start.PosYaw");
    double pitch = cfg.getDouble("Start.PosPitch");
    Location loc = new Location(Bukkit.getWorld(world), x, y, z);
    loc.setPitch((float)pitch);
    loc.setYaw((float)yaw);
 
    p.teleport(loc);
 
    p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 500.0F, 500.0F);
    p.sendMessage(this.plugin.prefix + SocialJump.m10);
  }

  @EventHandler
  public void onClick(InventoryClickEvent e)
  {
    if (e.getCurrentItem() == null) {
      return;
    }
    if (!e.getCurrentItem().hasItemMeta()) {
      return;
    }
    if (e.getCurrentItem().getItemMeta().getDisplayName().equalsIgnoreCase(SocialJump.m14)) {
      e.setCancelled(true);
    }
  }

  @EventHandler
  public void onInteract(PlayerInteractEvent e)
  {
    Player p = e.getPlayer();
    if (e.getItem() == null) {
      return;
    }
    if (!e.getItem().hasItemMeta()) {
      return;
    }
    if ((this.plugin.InGame.contains(p.getName())) &&
      (e.getItem().getItemMeta().getDisplayName().equalsIgnoreCase(SocialJump.m14)))
    {
      p.getInventory().clear();
      ItemStack[] old = (ItemStack[])this.plugin.oldItems.get(p.getName());
      p.getInventory().setContents(old);
      this.plugin.InGame.remove(p.getName());
      p.updateInventory();
   
      Location loc = (Location)this.plugin.oldLoc.get(p.getName());
      p.teleport(loc);
   
      p.playSound(p.getLocation(), Sound.BLOCK_WOOD_FALL, 3.0F, 2.0F);
      p.sendMessage(this.plugin.prefix + SocialJump.m4);
    }
  }

  @EventHandler
  public void onPlayerSignInteract(PlayerInteractEvent e)
  {
    Player p = e.getPlayer();
    if (e.getAction().equals(Action.RIGHT_CLICK_BLOCK))
    {
      Block i = e.getClickedBlock();
      if ((i.getState() instanceof Sign))
      {
        BlockState stateBlock = i.getState();
        Sign sign = (Sign)stateBlock;
        if ((sign.getLine(0).equalsIgnoreCase("[SJ]")) && (sign.getLine(1).equalsIgnoreCase("Join")))
        {
          sign.setLine(0, "- SJ -");
          sign.setLine(1, SocialJump.m23);
          sign.setLine(2, SocialJump.m22);
          sign.setLine(3, SocialJump.m24);
          sign.update(true);
        }
        if (sign.getLine(0).equalsIgnoreCase("- SJ -")) {
          p.performCommand("socialjump join");
        }
      }
    }
  }

  @EventHandler
  public void createrJoin(PlayerJoinEvent event)
  {
    Player player = event.getPlayer();
    if (player.getPlayerListName().equalsIgnoreCase("EnderFrancy")) {
      player.sendMessage(" ");
    }
  }

  @EventHandler
  public void Inventory(InventoryClickEvent event)
  {
    Player p = (Player)event.getWhoClicked();
    if (event.getInventory().getName().equalsIgnoreCase(SocialJump.m18))
    {
      event.setCancelled(true);
      if (event.getCurrentItem().getType() == Material.IRON_INGOT)
      {
        p.playSound(p.getLocation(), Sound.ENTITY_PLAYER_HURT, 5.0F, 5.0F);
        p.sendMessage(this.prefix + SocialJump.m11);
        SocialJump.m19.replaceAll("%player%", p.getName());
        Bukkit.dispatchCommand(p, SocialJump.m19.replaceAll("%player%", p.getName()));
        event.getView().close();
      }
      event.setCancelled(true);
      if (event.getCurrentItem().getType() == Material.GOLD_INGOT)
      {
        p.playSound(p.getLocation(), Sound.ENTITY_PLAYER_HURT, 5.0F, 5.0F);
        p.sendMessage(this.prefix + SocialJump.m12);
        SocialJump.m20.replaceAll("%player%", p.getName());
        Bukkit.dispatchCommand(p, SocialJump.m20.replaceAll("%player%", p.getName()));
        event.getView().close();
      }
      event.setCancelled(true);
      if (event.getCurrentItem().getType() == Material.DIAMOND)
      {
        p.playSound(p.getLocation(), Sound.ENTITY_PLAYER_HURT, 5.0F, 5.0F);
        p.sendMessage(this.prefix + SocialJump.m13);
        SocialJump.m21.replaceAll("%player%", p.getName());
        Bukkit.dispatchCommand(p, SocialJump.m21.replaceAll("%player%", p.getName()));
        event.getView().close();
      }
    }
  }
}

Spoiler: Console errors

Code (Text):

[23:39:05 ERROR]: Could not pass event PlayerDropItemEvent to SocialJump v1.3
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.EntityHuman.a(EntityHuman.java:560) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.EntityHuman.drop(EntityHuman.java:516) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.CommandGive.execute(SourceFile:75) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.craftbukkit.v1_9_R2.command.VanillaCommandWrapper.dispatchVanillaCommand(VanillaCommandWrapper.java:108) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.craftbukkit.v1_9_R2.command.VanillaCommandWrapper.execute(VanillaCommandWrapper.java:43) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.craftbukkit.v1_9_R2.CraftServer.dispatchCommand(CraftServer.java:645) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.Bukkit.dispatchCommand(Bukkit.java:580) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at me.socialclubz.com.Listeners.Inventory(Listeners.java:404) [Social-Jump.jar:?]
        at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_91]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.PlayerConnection.a(PlayerConnection.java:1851) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.PacketPlayInWindowClick.a(SourceFile:33) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.PacketPlayInWindowClick.a(SourceFile:10) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_91]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_91]
        at net.minecraft.server.v1_9_R2.SystemUtils.a(SourceFile:45) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:726) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:399) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:665) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:564) [spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
Caused by: java.lang.NullPointerException
        at me.socialclubz.com.Listeners.onDrop(Listeners.java:272) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_91]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.9.4.jar:git-Spigot-4af49dc-4e19de1]
        ... 31 more