Warning...

I Have i warning, can anywhere help me to fix it ^^

Code:

package listeners;

import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;

public class Head implements Listener{

    @EventHandler(priority=EventPriority.NORMAL)
    public void onDeath(PlayerDeathEvent e) {
        if(e.getEntity().getKiller() instanceof Player) {
            Player killer = e.getEntity().getKiller();
           
            ItemStack Kopf = new ItemStack(397, 1, (short) 3); //Here is the baad Warning...
            ItemMeta meta = Kopf.getItemMeta();
            meta.setDisplayName("§6"+e.getEntity().getName());
            Kopf.setItemMeta(meta);
           
            killer.getInventory().addItem(Kopf);
        }
    }

}

 

how do it? i'm new, my first plugin ^^

 

The warning appears because 397 is Integer, not a material. Use Material.SKULL_ITEM instead

 

Okay, Thank you ^^

Another error plz help ^^

Code:

package Commands; //Iwas stimmt hier nicht :(

import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.command.ConsoleCommandSender;
import org.bukkit.entity.Player;

import me.xSora.SoraSDK.main;

public class ChatClear implements CommandExecutor{

    main plugin;

    public ChatClear( ) {
  
    }

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label,
            String[] args) {
  
        if(sender instanceof ConsoleCommandSender) {
            ChatClearPlayers(100, "Console");
        }
        if(sender instanceof Player) {
            Player p = (Player) sender;
            if(!p.hasPermission("sora.cc")){
                p.sendMessage("§3[SoraSDK] §7Fehlende Rechte.");
                return true;
            }
            ChatClearPlayers(100, p.getName());
        }
  
        return true;
    }


    public void ChatClearPlayers(int zeilen, String name) {
  
        for(int i = 0; i<=zeilen; i++) {
            plugin.getServer().broadcastMessage("§3[SoraSDK] §7Der Chat wurde von §a"+ name +"§7 Geleert");
            }

    }
}

EDIT by Timtower: merged posts

 

if i enter /cc the console outpot only errors

 

Material.TheMaterial the list of materials can be found here: https://hub.spigotmc.org/javadocs/bukkit/index.html?org/bukkit/Material.html

As for the issue, look at what @timtower said just above.

 

http://pastebin.com/g60t6t8b

 

@xSora plugin is null, you need to get the instance through the constructor.

 

No, we need the warning. Not the code.

 

okay, Hiere is the error http://pastebin.com/0txLiqzb

 

Moved to Bukkit Alternates.

 

Caused by: java.lang.NullPointerException
at Commands.ChatClear.ChatClearPlayers(ChatClear.java:42) ~[?:?]

plugin.getServer().broadcastMessage("§3[SoraSDK] §7Der Chat wurde von §a"+ name +"§7 Geleert");

Means that AT THE MOMENT that the execution reaches this line, there is a null object being dereferenced on this line (ie, trying to access .getSomething() or .doSomething() on a null object. Possibilities: plugin.getServer() may be null, in which case the .broadcastMessage() cant be accessed. Or plugin may be null, and ou can't .getServer() from null.

The chances of .getServer() returning a null object is insanely small, so the odds are that plugin is null at this point. So trace the execution back - how does the program get to this line, and when it does, have we given value to the plugin object that it uses?

You have a plugin variable of the type main (your plugin main class name..). You dont initialize plugin within the constructor (where most people do)... you dont have a .set method to set plugin externally. Therefore 99.99999999% chance that the null is plugin {You can confirm by putting the following statement just before the error line:

Code:

if (plugin==null){System.err.println("plugin is null indeed");}

and you should see that message in your console/log just before the NPE gets thrown.

You need to initialize plugin, and through the constructor is the best place to do it, passing an instance of the plugin through the constructor when created in the calling code

 

do this instead of main plugin;

PHP:

public static main plugin;

and I think that you might don't need this code do you ?

Code:

public ChatClear( ) {
      
    }