Solved Why I get no Inventory?

Code:

public Inventory invnt(int in) {
      
        Inventory inv = Bukkit.createInventory(null, 27,"Daily");
inv.setItem(in, new ItemStack(Material.HOPPER));
return inv;
}

Code:

p.openInventory(inve.invnt(6));

 

Could you please explain the error you're experiencing, or include the error log that came with it. Otherwise we can not help you.

 

Code:

org.bukkit.command.CommandException: Unhandled exception executing command 'daily' in plugin Daily v1.0.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:641) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1385) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1220) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_191]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_191]
        at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:747) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:405) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_191]
Caused by: java.lang.NullPointerException
        at me.Kicksy.de.main.onCommand(main.java:63) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        ... 15 more

 

Something on line 63 in your 'main' class is null, which results in a NullPointerException. Could you post your full main class, as well as the class that contains the Inventory methods?

 

Code:

package me.Kicksy.de;

import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;

public class inve implements Listener {

    private main plugin;
    private Spieler spieler;

    public inve(main main) {
        this.plugin = main;
        spieler = this.plugin.spieler;
    }

    public ItemStack item(int id, String title) {
        ItemStack item = new ItemStack(id, 1);
        ItemMeta im = item.getItemMeta();
        im.setDisplayName(title);
        item.setItemMeta(im);
        return item;
    }

    public Inventory invnt(int Tag, Player p) {

        Inventory inv = Bukkit.createInventory(p, 27, "Daily");

        for (int i = 0; i < 27; i++) {
            inv.setItem(i, new ItemStack(Material.STAINED_GLASS, 1));
        }

        inv.setItem(4, new ItemStack(Material.HOPPER));

        // if(Tag-- < 0 && Tag++ <= plugin.getConfig().getInt("Tage")) {
        if (spieler.spielerConfig.getInt("Spieler." + p.getUniqueId() + ".Tag") + 4 > plugin.getConfig()
                .getInt("Tage")) {

            for (int i = 9; i < 17; i++) {
                int count = 0;
                count++;
                int day = Tag - 9 + count;
                if (day < 0) {
                    day *= -1;
                }
                inv.setItem(i, item(Integer.parseInt(plugin.getConfig().getString("Belohung." + day + ".item")),
                        plugin.getConfig().getString("Belohung." + Tag-- + ".titel")));
            }
            inv.setItem(12, item(Integer.parseInt(plugin.getConfig().getString("Belohung." + Tag-- + ".item")),
                    plugin.getConfig().getString("Belohung." + Tag-- + ".titel")));
            inv.setItem(13, item(Integer.parseInt(plugin.getConfig().getString("Belohung." + Tag + ".item")),
                    plugin.getConfig().getString("Belohung." + Tag + ".titel")));
            inv.setItem(14, item(Integer.parseInt(plugin.getConfig().getString("Belohung." + Tag++ + ".item")),
                    plugin.getConfig().getString("Belohung." + Tag++ + ".titel")));
        }
        return inv;
    }
}

Code:

package me.Kicksy.de;


import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.java.JavaPlugin;

public class main extends JavaPlugin {

    String prefix = "[Daily] ";
    public Spieler spieler;
    private inve inve;

    public void loadConfiguration() {
        this.getConfig().addDefault("Tage", "10");
        this.getConfig().options().copyDefaults(true);
        this.saveConfig();
    }

    @Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(new events(this), this);
        //getServer().getPluginManager().registerEvents(new events(new main()), this);
        //Bukkit.getPluginManager().registerEvents(new events(this), this);  
        loadConfiguration();
        int Tage = Integer.parseInt(this.getConfig().getString("Tage"));
        getConfig().set("Belohung." + 0 + ".int", 160);
        for (int i = 1; i < Tage + 1; i++) {
            if (getConfig().getString("Belohung." + i + ".type") == null) {
                getConfig().set("Belohung." + i + ".item", i);
                getConfig().set("Belohung." + i + ".titel", "10 coins");
                getConfig().set("Belohung." + i + ".type", "Item");
                getConfig().set("Belohung." + i + ".int", i);
             
                saveConfig();
            }
        }
     
        System.out.print(prefix + "Das Plugin wurde aktiviert!");
    }

    @SuppressWarnings("deprecation")
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        Player p = (Player) sender;
        if (cmd.getName().equalsIgnoreCase("daily")) {
            if (!(sender instanceof Player)) {
                sender.sendMessage("Du musst ein Spieler sein, um diesen Befehl ausfuehren zu können!");
                return true;
            } else {

                /*Inventory inv = Bukkit.createInventory(p, 27,"Daily");
                for(int i = 0; i<27;i++) { 
                    inv.setItem(i, new ItemStack(Material.STAINED_GLASS,1));
                }
             
                inv.setItem(4, new ItemStack(Material.HOPPER));
                inv.setItem(13, new ItemStack(Integer.parseInt(getConfig().getString("Belohung." + "2" + ".item")),1));
                */p.openInventory(inve.invnt(6,p)); //63 Line
            }
        }
        return true;
     
     
    }

}

 

I'm assuming you're coding for a version close to 1.12.

Defining a new ItemStack with the constructor 'ItemStack(Integer, Integer)', which you are using here

Code:

public ItemStack item(int id, String title) {
        ItemStack item = new ItemStack(id, 1);
        ItemMeta im = item.getItemMeta();
        im.setDisplayName(title);
        item.setItemMeta(im);
        return item;
    }

does not exist. A Material is required to create an item. This should be the case, or you are coding for a version that's quite a bit older. Which version are you coding for, just to be sure?

 

Also if I create only a empty inventory with no Items I get a error.
And I can create a ItemStack only with a int.

 

1.12

I solved the the problem. I add to the onEnable method:

Code:

inve = new inve(this);

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