Error occurred while enabling [Plugin] (Is it up to date?)

Please help me

I'm getting this error everytime my server loads:

Code:java

Error occurred while enabling LobbySystem v1.0 Beta (Is it up to date?)
java.lang.NullPointerException
  at de.max.lobby.voting.Voting.initVotingInventorys(Voting.java:42) ~[?:?]
  at de.max.lobby.voting.Voting.<init>(Voting.java:33) ~[?:?]
  at de.max.lobby.main.Main.initVoting(Main.java:88) ~[?:?]
  at de.max.lobby.main.Main.init(Main.java:96) ~[?:?]
  at de.max.lobby.main.Main.onEnable(Main.java:51) ~[?:?]
  at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:291) ~[spigot.jar:git-Spigot-7d15d07-c194444]
  at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [spigot.jar:git-Spigot-7d15d07-c194444]
  at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot.jar:git-Spigot-7d15d07-c194444]
  at org.bukkit.craftbukkit.v1_9_R1.CraftServer.loadPlugin(CraftServer.java:361) [spigot.jar:git-Spigot-7d15d07-c194444]
  at org.bukkit.craftbukkit.v1_9_R1.CraftServer.enablePlugins(CraftServer.java:321) [spigot.jar:git-Spigot-7d15d07-c194444]
  at org.bukkit.craftbukkit.v1_9_R1.CraftServer.reload(CraftServer.java:745) [spigot.jar:git-Spigot-7d15d07-c194444]
  at org.bukkit.Bukkit.reload(Bukkit.java:539) [spigot.jar:git-Spigot-7d15d07-c194444]
  at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [spigot.jar:git-Spigot-7d15d07-c194444]
  at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot.jar:git-Spigot-7d15d07-c194444]
  at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchCommand(CraftServer.java:645) [spigot.jar:git-Spigot-7d15d07-c194444]
  at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchServerCommand(CraftServer.java:631) [spigot.jar:git-Spigot-7d15d07-c194444]
  at net.minecraft.server.v1_9_R1.DedicatedServer.aL(DedicatedServer.java:437) [spigot.jar:git-Spigot-7d15d07-c194444]
  at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:401) [spigot.jar:git-Spigot-7d15d07-c194444]
  at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:655) [spigot.jar:git-Spigot-7d15d07-c194444]
  at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:554) [spigot.jar:git-Spigot-7d15d07-c194444]

That's my Voting.java:

Code:Java

package de.max.lobby.voting;
 
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
 
import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.inventory.Inventory;
 
import de.max.lobby.main.Main;
import de.max.lobby.util.ItemBuilder;
 
public class Voting {
 
   public static final int MAP_AMOUNT = 2;
   public static final String VOTING_INVENTORY_TITLE = "§6§lMap-Voting";
 
   private Main plugin;
   private ArrayList<Map> maps;
   private Map[] votingMaps;
   private int[] votingInventoryOrder = new int[]{3, 5};
   private HashMap<String, Integer> playerVotes;
   private Inventory votingInventory;
 
   public Voting(Main plugin, ArrayList<Map> maps) {
     this.plugin = plugin;
     this.maps = maps;
     votingMaps = new Map[Voting.MAP_AMOUNT];
     playerVotes = new HashMap<>();
 
     initVotingInventorys();
     chooseRandomMaps();
   }
 
   public void initVotingInventorys() {
     votingInventory = Bukkit.createInventory(null, 9 * 1, Voting.VOTING_INVENTORY_TITLE);
     for(int i = 0; i < votingMaps.length; i++) {
       Map currentMap = votingMaps[i];
       votingInventory.setItem(votingInventoryOrder[i], new ItemBuilder(Material.PAPER)
                              .setDisplayName("§6" + currentMap.getName() + "§c - §c§l" + currentMap.getVotes() + " Votes")
                              .setLore(" ", "§7Erbauer: §a" + currentMap.getBuilder()).build());
     }
   }
 
 
   private void chooseRandomMaps() {
     for(int i = 0; i < votingMaps.length; i++) {
       Collections.shuffle(maps);
       votingMaps[i] = maps.remove(0);
     }
   }
 
 
   public Map getWinnerMap() {
     Map winnerMap = votingMaps[0];
     for(int i = 0; i < votingMaps.length; i++) {
       if(votingMaps[i].getVotes() >= winnerMap.getVotes()) {
         winnerMap = votingMaps[i];
       }
     }
     return winnerMap;
   }
 
   public void vote(Player player, int votingMap) {
     if(playerVotes.containsKey(player.getName())) {
       votingMaps[votingMap].addVote();
       player.closeInventory();
       player.sendMessage(Main.PREFIX + "§aDu hast für die Map §6" + votingMaps[votingMap].getName() + "§a abgestimmt.");
       playerVotes.put(player.getName(), votingMap);
       initVotingInventorys();
     } else {
       player.sendMessage(Main.PREFIX + "§cDu hast bereits gevotet.");
     }
   }
 
   public HashMap<String, Integer> getPlayerVotes() {
     return playerVotes;
   }
 
   public Inventory getVotingInventory() {
     return votingInventory;
   }
 
   public int[] getVotingInventoryOrder() {
     return votingInventoryOrder;
   }
 
   public Map[] getVotingMaps() {
     return votingMaps;
   }
 
}[/i][/i][/i][/i][/i]

I don't know what is null.

 

@DevMax_Plg I would guess 'currentMap' is null.

 

@KarimAKL is right currentMap is null. You're initialising votingMaps to be an array of Map. After that you are assigning votingMaps (which is null) to currentMap.

Line 43 in your example (currentMap.getName) is causing the exception.