Solved Inventory Help

So when i type the command shop nothing is happening but an error is happening
Error:
java.lang.NullPointerException
at org.bukkit.craftbukkit.v1_6_R3.entity.CraftHumanEntity.openInventory(CraftHumanEntity.java:185)
at me.bodhiIsEpic.bukkit.Shop.onPlayerInteract(Shop.java:80)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
... 16 more

Code:

Code:java

package me.bodhiIsEpic.bukkit;
 
import java.util.Arrays;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
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;
import org.bukkit.inventory.meta.ItemMeta;
 
public class Shop implements Listener, CommandExecutor {
 
private Inventory inv;
private ItemStack c, s, a;
 
public Shop() {
inv = Bukkit.getServer().createInventory(null, 9, "Shop");
 
c = createItem(new ItemStack(Material.DIAMOND_SWORD, 1), ChatColor.GREEN + "The Slayer", 10);
s = createItem(new ItemStack(Material.BOW, 1), ChatColor.YELLOW + "The assasin", 5);
a = createItem(new ItemStack(Material.DIAMOND_SPADE, 1), ChatColor.RED + "The Spade", 3);
 
inv.setItem(0, c);
inv.setItem(2, s);
inv.setItem(4, a);
}
 
public Shop(Main main) {
}
 
private ItemStack createItem(ItemStack is, String name, int amount) {
ItemStack i = new ItemStack(is);
ItemMeta im = i.getItemMeta();
im.setDisplayName(name);
im.setLore(Arrays.asList("Would you like to buy," + name.toLowerCase() + "for" + amount));
i.setItemMeta(im);
return i;
}
private ItemStack AddItem(ItemStack is, String name, String note, Player p) {
ItemStack i = new ItemStack(is);
ItemMeta im = i.getItemMeta();
im.setDisplayName(name);
im.setLore(Arrays.asList(note));
i.setItemMeta(im);
p.getInventory().addItem(i);
return i;
}
 
@EventHandler
public void onInventoryClick(InventoryClickEvent e) {
if (!e.getInventory().getName().equalsIgnoreCase(inv.getName())) return;
if (e.getCurrentItem().getItemMeta() == null) return;
if (e.getCurrentItem().getItemMeta().getDisplayName().contains("The Slayer")) {
e.setCancelled(true);
AddItem(new ItemStack(Material.DIAMOND_SWORD, 1), ChatColor.GREEN + "The Slayer", ChatColor.LIGHT_PURPLE + "The Slayer of zombies", (Player) e.getWhoClicked());
e.getWhoClicked().closeInventory();
}
if (e.getCurrentItem().getItemMeta().getDisplayName().contains("The assasin")) {
e.setCancelled(true);
e.getWhoClicked().closeInventory();
}
if (e.getCurrentItem().getItemMeta().getDisplayName().contains("The Spade")) {
e.setCancelled(true);
e.getWhoClicked().closeInventory();
}
}
 
@Override
public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
if (cmd.getName().equalsIgnoreCase("shop")) {
Player player = (Player) sender;
player.openInventory(inv); //Line 80
}
return false;
}
}

Thank you all for helping

bump

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

 

bodhistrontg
Refrain from bumping more than once every 24 hours.

Try adding debug messages and see how far the code gets.

 

check if the item isn't null,
and if the item.getType() isn't null.

 

Check if what item isn't null and it is not opening the inventory