Development Assistance NPE Stack Trace Error

I've spent the past hour trying to figure out what's null, but I just can't seem to find it. I have a PlayerRespawnEvent, and I want it to open up an inventory gui when they respawn.

EventHandler:

Code:java

 
@EventHandler
    public void onPlayerRespawn(PlayerRespawnEvent e) {
        final Player player = e.getPlayer();
        if (player.hasPermission("sheriff.issheriff")) {
            Bukkit.getServer().getScheduler().runTaskLater(Sheriff.getInstance(), new Runnable() {
                public void run() {
                    sheriffssinstance.showsheriff(player);
                    ininv.add(player.getName());
                }
            }, 2);
            if (ininv.contains(e.getPlayer().getName())) {
                Bukkit.getServer().getScheduler().runTaskLater(Sheriff.getInstance(), new Runnable() {
                    public void run() {
                        sheriffssinstance.showsheriff(player);
                    }
                }, 2);
            }
        }

The error is on line 59, which is:

Code:java

sheriffssinstance.showsheriff(player);

Stack Trace:

Code:java

 
[00:40:34 WARN]: [Sheriff] Task #77694 for Sheriff v1.0 generated an exception
java.lang.NullPointerException
        at me.signatured.sheriff.SpawnSelectorEvents$3.run(SpawnSelectorEvents.j
ava:59) ~[?:?]
        at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftTask.run(CraftTask.java
:71) ~[spigot.jar:git-Spigot-13716d9-0899683]
        at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftScheduler.mainThreadHea
rtbeat(CraftScheduler.java:350) [spigot.jar:git-Spigot-13716d9-0899683]
        at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:6
94) [spigot.jar:git-Spigot-13716d9-0899683]
        at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:3
16) [spigot.jar:git-Spigot-13716d9-0899683]
        at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:6
23) [spigot.jar:git-Spigot-13716d9-0899683]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java
:526) [spigot.jar:git-Spigot-13716d9-0899683]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_25]

I understand that something is null. I just don't see what could be null. Here is my SheriffSpawnSelector class as well (where the sheriffshow method is from):

Code:java

 
package me.signatured.sheriff;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.DyeColor;
import org.bukkit.entity.Player;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.material.Wool;
 
public class SheriffSpawnSelector {
 
    SettingsManager settings = SettingsManager.getInstance();
    CommandManager cmdinstance = CommandManager.getInstance();
 
    private static SheriffSpawnSelector ssinstance;
    private static Inventory inv;
    private ItemStack town1, town2, town3, town4;
 
    public static Inventory getInv() {
        return inv;
    }
 
    public SheriffSpawnSelector() {
        ssinstance = this;
 
        inv = Bukkit.getServer().createInventory(null, 9, ChatColor.DARK_GREEN + "Choose a spawn location!");
 
        town1 = createItem(DyeColor.GREEN, ChatColor.GREEN + "Town1");
        town2 = createItem(DyeColor.YELLOW, ChatColor.GREEN + "Town2");
        town3 = createItem(DyeColor.BLUE, ChatColor.GREEN + "Town3");
        town4 = createItem(DyeColor.RED, ChatColor.GREEN + "Town4");
 
        inv.setItem(2, town1);
        inv.setItem(3, town2);
        inv.setItem(5, town3);
        inv.setItem(6, town4);
    }
 
    private ItemStack createItem(DyeColor dc, String name) {
        ItemStack i = new Wool(dc).toItemStack(1);
        ItemMeta im = i.getItemMeta();
        im.setDisplayName(name);
        i.setItemMeta(im);
        return i;
    }
 
    public void showsheriff(Player p) {
        p.openInventory(inv);
    }
 
    public static SheriffSpawnSelector getInstance() {
        return ssinstance;
    }
 
}

Anyone have any ideas? I've ran out.

 

sheriffssinstance is clearly null, but we won't know why until you post the entire class.

 

Full Class:

Code:java

 
package me.signatured.sheriff;
 
import java.util.ArrayList;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.event.inventory.InventoryCloseEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerRespawnEvent;
import org.bukkit.inventory.Inventory;
 
public class SpawnSelectorEvents implements Listener {
 
    private static ArrayList<String> ininv = new ArrayList<String>();
    Inventory inv = SpawnSelector.getInv();
    Inventory sinv = SheriffSpawnSelector.getInv();
    SpawnSelector ssinstance = SpawnSelector.getInstance();
    SheriffSpawnSelector sheriffssinstance = SheriffSpawnSelector.getInstance();
    ArrayList<String> inPrison = Prison.getInPrison();
 
    public static ArrayList<String> getInInv() {
        return ininv;
    }
 
    @EventHandler
    public void onPlayerRespawn(PlayerRespawnEvent e) {
        final Player player = e.getPlayer();
        if (player.hasPermission("sheriff.issheriff")) {
            Bukkit.getServer().getScheduler().runTaskLater(Sheriff.getInstance(), new Runnable() {
                public void run() {
                    sheriffssinstance.showsheriff(player);
                    ininv.add(player.getName());
                }
            }, 2);
            if (ininv.contains(e.getPlayer().getName())) {
                Bukkit.getServer().getScheduler().runTaskLater(Sheriff.getInstance(), new Runnable() {
                    public void run() {
                        sheriffssinstance.showsheriff(player);
                    }
                }, 2);
            }
        }
 
        if (player.hasPermission("sheriff.issheriff")) return;
        Bukkit.getServer().getScheduler().runTaskLater(Sheriff.getInstance(), new Runnable() {
            public void run() {
                if (inPrison.contains(player.getName())) return;
                ssinstance.showbandit(player);
                ininv.add(player.getName());
            }
        }, 2);
        if (ininv.contains(e.getPlayer().getName())) {
            Bukkit.getServer().getScheduler().runTaskLater(Sheriff.getInstance(), new Runnable() {
                public void run() {
                    ssinstance.showbandit(player);
                }
            }, 2);
        }
    }
}

 

@Signatured Are you sure the error is at the

?
Because your stacktrace it pointing the error at this line

Code:

Bukkit.getServer().getScheduler().runTaskLater(Sheriff.getInstance(), new Runnable() {

Are you sure your code hasn't been changed or messed up when you pasted it?