Solved NullPointerException on InventoryClickEvent

I am making a plugin just to learn and I am at the part where I want that if you click on a sign that there pops up an inventory and that you than can select your kit. the inventory pop up works but the kit selection doesn 't work.

i get this error:

Code:

Could not pass event InventoryClickEvent to TestPlugin vBeta1.9.1
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:499) [spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) [spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1877) [spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at net.minecraft.server.v1_12_R1.PacketPlayInWindowClick.a(SourceFile:33) [spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at net.minecraft.server.v1_12_R1.PacketPlayInWindowClick.a(SourceFile:10) [spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_131]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_131]
        at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:747) [spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:405) [spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot-1.12.jar:git-Spigot-7228328-af1c013]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_131]
Caused by: java.lang.NullPointerException
        at me.bukkit.firstFlame.events.inventory.InventoryClick.onInventoryClick(InventoryClick.java:30) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_131]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_131]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_131]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_131]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot-1.12.jar:git-Spigot-7228328-af1c013]
        ... 15 more

and this is my onInventoryClickEvent:

Code:

package me.bukkit.firstFlame.events.inventory;

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.inventory.Inventory;
import org.bukkit.inventory.ItemStack;

public class InventoryClick implements Listener {

    @EventHandler
    public void onInventoryClick(InventoryClickEvent event) {

        Player player = (Player) event.getWhoClicked();
        Inventory PlayerInv = player.getInventory();
        Inventory inv = event.getClickedInventory();

        player.sendMessage("stap1");

        if (inv.getName().equalsIgnoreCase("Kit")) {

            player.sendMessage("stap2");

            ItemStack item = event.getCurrentItem();
          
            if (item != null) {
              
                event.setCancelled(true);
              
                if (item.getItemMeta().getDisplayName().equalsIgnoreCase("starter kit")) {

                    player.sendMessage("stap3");

                    ItemStack food = new ItemStack(Material.COOKED_BEEF, 6);
                    ItemStack ChestArmor = new ItemStack(Material.LEATHER_CHESTPLATE);
                    ItemStack sword = new ItemStack(Material.STONE_SWORD);

                    PlayerInv.clear();
                    PlayerInv.addItem(food, sword, ChestArmor);

                }
            }
        }

    }

}

If there is someone who could help, that would be nice!

 

@ramptoetsenbord
What is line 30 in your code?

 

line 30 is:

Code:

if (item.getItemMeta().getDisplayName().equalsIgnoreCase("starter kit")) {
}

i think this is ok and that it works

srry for the delay my messages get delayd until there is a moderator

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

thank you!
this works indeed!
just added in a null checker and everithing works!