How to make a custom droplist?

Code:

/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package events.March9;

import java.util.ArrayList;
import java.util.List;

import lineage2.commons.util.Rnd;
import lineage2.gameserver.Announcements;
import lineage2.gameserver.Config;
import lineage2.gameserver.cache.Msg;
import lineage2.gameserver.listener.actor.OnDeathListener;
import lineage2.gameserver.listener.actor.player.OnPlayerEnterListener;
import lineage2.gameserver.model.Creature;
import lineage2.gameserver.model.Player;
import lineage2.gameserver.model.SimpleSpawner;
import lineage2.gameserver.model.actor.listener.CharListenerList;
import lineage2.gameserver.model.instances.NpcInstance;
import lineage2.gameserver.network.serverpackets.components.CustomMessage;
import lineage2.gameserver.scripts.Functions;
import lineage2.gameserver.scripts.ScriptFile;
import lineage2.gameserver.utils.Util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Mobius
 * @version $Revision: 1.0 $
 */
public class March9 extends Functions implements ScriptFile, OnDeathListener, OnPlayerEnterListener
{
   /**
    * Field _log.
    */
   private static final Logger _log = LoggerFactory.getLogger(March9.class);
   /**
    * Field EVENT_NAME. (value is ""March9"")
    */
   private static final String EVENT_NAME = "March9";
   /**
    * Field RECIPE_PRICE. (value is 50000)
    */
   private static final int RECIPE_PRICE = 50000;
   /**
    * Field RECIPE_ID. (value is 20191)
    */
   private static final int RECIPE_ID = 20191;
   /**
    * Field EVENT_MANAGER_ID. (value is 4301)
    */
   private static final int EVENT_MANAGER_ID = 4301;
   /**
    * Field _spawns.
    */
   private static final List<SimpleSpawner> _spawns = new ArrayList<>();
   /**
    * Field DROP.
    */
   private static final int[] DROP =
   {
      6673,// อาเดนางานฉลอง
      6633,// Dummy - General Item 1
      6634,// Dummy - General Item 2
      6635
   // Dummy - General Item 3
   // Mark of Cheers
   };
   /**
    * Field _active.
    */
   private static boolean _active = false;
   
   /**
    * Method spawnEventManagers.
    */
   private void spawnEventManagers()
   {
      final int[][] EVENT_MANAGERS =
      {
         {
            -113224,
            -244936,
            -15536,
            8192
         }
      };
      SpawnNPCs(EVENT_MANAGER_ID, EVENT_MANAGERS, _spawns);
   }
   
   /**
    * Method unSpawnEventManagers.
    */
   private void unSpawnEventManagers()
   {
      deSpawnNPCs(_spawns);
   }
   
   /**
    * Method isActive.
    * @return boolean
    */
   private static boolean isActive()
   {
      return IsActive(EVENT_NAME);
   }
   
   /**
    * Method startEvent.
    */
   public void startEvent()
   {
      final Player player = getSelf();
      if (!player.getPlayerAccess().IsEventGm)
      {
         return;
      }
      if (SetActive(EVENT_NAME, true))
      {
         spawnEventManagers();
         System.out.println("Event: March 9 started.");
         Announcements.getInstance().announceByCustomMessage("scripts.events.March9.AnnounceEventStarted", null);
      }
      else
      {
         player.sendMessage("Event 'March 9' already started.");
      }
      _active = true;
      show("admin/events.htm", player);
   }
   
   /**
    * Method stopEvent.
    */
   public void stopEvent()
   {
      final Player player = getSelf();
      if (!player.getPlayerAccess().IsEventGm)
      {
         return;
      }
      if (SetActive(EVENT_NAME, false))
      {
         unSpawnEventManagers();
         System.out.println("Event: March 9 stopped.");
         Announcements.getInstance().announceByCustomMessage("scripts.events.March9.AnnounceEventStoped", null);
      }
      else
      {
         player.sendMessage("Event 'March 9' not started.");
      }
      _active = false;
      show("admin/events.htm", player);
   }
   
   /**
    * Method buyrecipe.
    */
   public void buyrecipe()
   {
      final Player player = getSelf();
      if (!player.isQuestContinuationPossible(true))
      {
         return;
      }
      if (!NpcInstance.canBypassCheck(player, player.getLastNpc()))
      {
         return;
      }
      final long need_adena = (long) (RECIPE_PRICE * Config.EVENT_MARCH9_PRICE_RATE);
      if (player.getAdena() < need_adena)
      {
         player.sendPacket(Msg.YOU_DO_NOT_HAVE_ENOUGH_ADENA);
         return;
      }
      player.reduceAdena(need_adena, true);
      Functions.addItem(player, RECIPE_ID, 1);
   }
   
   /**
    * Method DialogAppend_4301.
    * @param val Integer
    * @return String
    */
   public String DialogAppend_4301(Integer val)
   {
      if (val != 0)
      {
         return "";
      }
      final String price;
      String append = "";
      price = Util.formatAdena((long) (RECIPE_PRICE * Config.EVENT_MARCH9_PRICE_RATE));
      append += "<br><a action=\"bypass -h scripts_events.March9.March9:buyrecipe\">";
      append += new CustomMessage("scripts.events.March9.buyrecipe", getSelf()).addString(price);
      append += "</a><br>";
      return append;
   }
   
   /**
    * Method onLoad.
    * @see lineage2.gameserver.scripts.ScriptFile#onLoad()
    */
   @Override
   public void onLoad()
   {
      CharListenerList.addGlobal(this);
      if (isActive())
      {
         _active = true;
         spawnEventManagers();
         _log.info("Loaded Event: March 9 [state: activated]");
      }
      else
      {
         _log.info("Loaded Event: March 9 [state: deactivated]");
      }
   }
   
   /**
    * Method onReload.
    * @see lineage2.gameserver.scripts.ScriptFile#onReload()
    */
   @Override
   public void onReload()
   {
      unSpawnEventManagers();
   }
   
   /**
    * Method onShutdown.
    * @see lineage2.gameserver.scripts.ScriptFile#onShutdown()
    */
   @Override
   public void onShutdown()
   {
      unSpawnEventManagers();
   }
   
   /**
    * Method onPlayerEnter.
    * @param player Player
    * @see lineage2.gameserver.listener.actor.player.OnPlayerEnterListener#onPlayerEnter(Player)
    */
   @Override
   public void onPlayerEnter(Player player)
   {
      if (_active)
      {
         Announcements.getInstance().announceToPlayerByCustomMessage(player, "scripts.events.March9.AnnounceEventStarted", null);
      }
   }
   
   /**
    * Method onDeath.
    * @param cha Creature
    * @param killer Creature
    * @see lineage2.gameserver.listener.actor.OnDeathListener#onDeath(Creature, Creature)
    */
   @Override
   public void onDeath(Creature cha, Creature killer)
   {
      if (_active && SimpleCheckDrop(cha, killer) && Rnd.chance(Config.EVENT_MARCH9_DROP_CHANCE * killer.getPlayer().getRateItems() * ((NpcInstance) cha).getTemplate().rateHp))
      {
         ((NpcInstance) cha).dropItem(killer.getPlayer(), DROP[Rnd.get(DROP.length)], 1);
      }
   }
}


darkillust wrote:can use old quest to make custom quest like evilspirit quest i has edit long time ago can select monster id in quest