Solved Get error when item isn't equipped

So I'm trying to run a particle effect when a player has an item on. When they have it on it works great and when they take the item off it turns the particles off which is fine. However I get a null pointer exception error in the console when the item is not equipped. Here is the code.

Code:

package me.plisov.shards.particles;

import org.bukkit.Location;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerMoveEvent;

import com.massivecraft.massivecore.particleeffect.ParticleEffect;

import me.plisov.shards.Enable;
import net.md_5.bungee.api.ChatColor;

public class Boots implements Listener {

    Enable plugin;
    public Boots(Enable plugin) {
        this.plugin = plugin;
    }

    @EventHandler
    public void playerInventory(PlayerMoveEvent event) {

        Player player = (Player) event.getPlayer();

        if(player.getInventory().getBoots().getItemMeta().getDisplayName().contains(ChatColor.RED + "" + ChatColor.BOLD + "Artifact Boots")) {

            Location location1 = player.getEyeLocation();
            Location location2 = player.getEyeLocation();
            Location location3 = player.getEyeLocation();
            int particles = 50;
            float radius = 0.7f;
            for (int i = 0; i < particles; i++) {
                double angle, x, z;
                angle = 2 * Math.PI * i / particles;
                x = Math.cos(angle) * radius;
                z = Math.sin(angle) * radius;
                location1.add(x, 0, z);
                location2.add(x, -0.66, z);
                location3.add(x, -1.33, z);
                //ParticleEffect.FLAME.display(location1, 0, 0, 0, 0, 1);
                //ParticleEffect.FLAME.display(location2, 0, 0, 0, 0, 1);
                ParticleEffect.FLAME.display(location3, 0, 0, 0, 0, 1);
                location1.subtract(x, 0, z);
                location2.subtract(x, -0.66, z);
                location3.subtract(x, -1.33, z);           
            }
        } else {
            return;
        }
    }
}

And here is the error

Code:

[01:30:58 ERROR]: Could not pass event PlayerMoveEvent to Shards v1.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:615) [spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at net.minecraft.server.v1_11_R1.PacketPlayInFlying.a(SourceFile:126) [spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at net.minecraft.server.v1_11_R1.PacketPlayInFlying$PacketPlayInPosition.a(SourceFile:57) [spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at net.minecraft.server.v1_11_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_121]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_121]
        at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:46) [spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:739) [spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:675) [spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:574) [spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_121]
Caused by: java.lang.NullPointerException
        at me.plisov.shards.particles.Boots.playerInventory(Boots.java:26) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_121]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_121]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_121]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_121]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot-1.11.22.jar:git-Spigot-6de2fbc-80dd971]
        ... 15 more

Line 26 is

Code:

        if(player.getInventory().getBoots().getItemMeta().getDisplayName().contains(ChatColor.RED + "" + ChatColor.BOLD + "Artifact Boots")) {

 

How do you know:
1. They have boots on at all
2. Their boots have item meta
3. Their boots have a display name

 

@timtower @Drkmaster83
Thanks guys. That fixed the problem